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Destabilization of Magnetic Order in a Dilute Kitaev Spin Liquid Candidate (2017)

P. Lampen-Kelley, A. Banerjee, A. A. Aczel, H. B. Cao, M. B. Stone, C. A. Bridges, J.-Q. Yan, S. E. Nagler, and D. Mandrus

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-12-07

Beschreibung: Author(s): P. Lampen-Kelley, A. Banerjee, A. A. Aczel, H. B. Cao, M. B. Stone, C. A. Bridges, J.-Q. Yan, S. E. Nagler, and D. Mandrus The insulating honeycomb magnet α − RuCl 3 exhibits fractionalized excitations that signal its proximity to a Kitaev quantum spin liquid state; however, at T = 0 , fragile long-range magnetic order arises from non-Kitaev terms in the Hamiltonian. Spin vacancies in the form of Ir 3 + substituted for Ru are f... [Phys. Rev. Lett. 119, 237203] Published Wed Dec 06, 2017

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

Print ISSN: 0031-9007

Digitale ISSN: 1079-7114

Thema: Physik

Publiziert von American Physical Society (APS)

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Influence of uniaxial single-ion anisotropy on the magnetic and thermal properties of Heisenberg antiferromagnets within unified molecular field theory (2017)

David C. Johnston

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-03-18

Beschreibung: Author(s): David C. Johnston The influence of uniaxial single-ion anisotropy − D S z 2 on the magnetic and thermal properties of Heisenberg antiferromagnets (AFMs) is investigated. The uniaxial anisotropy is treated exactly and the Heisenberg interactions are treated within unified molecular field theory (MFT) [ Phys. Rev. B 91 , 064… [Phys. Rev. B 95, 094421] Published Fri Mar 17, 2017

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

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Optical Talbot carpet with atomic density gratings obtained by standing-wave manipulation (2017)

Chen Li, Tianwei Zhou, Yueyang Zhai, Xuguang Yue, Jinggang Xiang, Shifeng Yang, Wei Xiong, and Xuzong Chen

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-03-21

Beschreibung: Author(s): Chen Li, Tianwei Zhou, Yueyang Zhai, Xuguang Yue, Jinggang Xiang, Shifeng Yang, Wei Xiong, and Xuzong Chen We report a method of generating atomic density gratings by standing-wave manipulation of ultracold Bose gases. By illuminating the gratings with a beam of homogeneous light, we observe one- and two-dimensional Talbot carpets. We further measure the autocorrelation function of the images, which vari… [Phys. Rev. A 95, 033821] Published Mon Mar 20, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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Proximity-Induced Shiba States in a Molecular Junction (2017)

Joshua O. Island, Rocco Gaudenzi, Joeri de Bruijckere, Enrique Burzurí, Carlos Franco, Marta Mas-Torrent, Concepció Rovira, Jaume Veciana, Teun M. Klapwijk, Ramón Aguado, and Herre S. J. van der Zant

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-03-21

Beschreibung: Author(s): Joshua O. Island, Rocco Gaudenzi, Joeri de Bruijckere, Enrique Burzurí, Carlos Franco, Marta Mas-Torrent, Concepció Rovira, Jaume Veciana, Teun M. Klapwijk, Ramón Aguado, and Herre S. J. van der Zant Superconductors containing magnetic impurities exhibit intriguing phenomena derived from the competition between Cooper pairing and Kondo screening. At the heart of this competition are the Yu-Shiba-Rusinov (Shiba) states which arise from the pair breaking effects a magnetic impurity has on a superc… [Phys. Rev. Lett. 118, 117001] Published Fri Mar 17, 2017

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

Print ISSN: 0031-9007

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Bilayer Graphene as a Platform for Bosonic Symmetry-Protected Topological States (2017)

Zhen Bi, Ruixing Zhang, Yi-Zhuang You, Andrea Young, Leon Balents, Chao-Xing Liu, and Cenke Xu

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-03-22

Beschreibung: Author(s): Zhen Bi, Ruixing Zhang, Yi-Zhuang You, Andrea Young, Leon Balents, Chao-Xing Liu, and Cenke Xu Bosonic symmetry protected topological (BSPT) states, the bosonic analogue of topological insulators, have attracted enormous theoretical interest in the last few years. Although BSPT states have been classified by various approaches, there is so far no successful experimental realization of any BSP… [Phys. Rev. Lett. 118, 126801] Published Mon Mar 20, 2017

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Squeezing the fundamental temperature fluctuations of a high-Q microresonator (2017)

Xuan Sun, Rui Luo, Xi-Cheng Zhang, and Qiang Lin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Xuan Sun, Rui Luo, Xi-Cheng Zhang, and Qiang Lin Temperature fluctuations of an optical resonator underlie a fundamental limit of its cavity stability. Here we show that the fundamental temperature fluctuations of a high- Q microresonator can be suppressed remarkably by pure optical means without cooling the device temperature. An optical wave laun… [Phys. Rev. A 95, 023822] Published Fri Feb 10, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Supermode spatial optical solitons in liquid crystals with competing nonlinearities (2017)

Pawel S. Jung, Wieslaw Krolikowski, Urszula A. Laudyn, Marek Trippenbach, and Miroslaw A. Karpierz

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Pawel S. Jung, Wieslaw Krolikowski, Urszula A. Laudyn, Marek Trippenbach, and Miroslaw A. Karpierz We study numerically the formation of spatial optical solitons in nematic liquid crystals with competing nonlocal nonlinearities. We demonstrate that at a sufficiently high input power the interplay between focusing and thermally induced defocusing may lead to the formation of two-peak fundamental s… [Phys. Rev. A 95, 023820] Published Thu Feb 09, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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8

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Limits of the time-multiplexed photon-counting method (2017)

Regina Kruse, Johannes Tiedau, Tim J. Bartley, Sonja Barkhofen, and Christine Silberhorn

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Regina Kruse, Johannes Tiedau, Tim J. Bartley, Sonja Barkhofen, and Christine Silberhorn The progress in building large quantum states and networks requires sophisticated detection techniques to verify the desired operation. To achieve this aim, a cost- and resource-efficient detection method is the time multiplexing of photonic states. This design is assumed to be efficiently scalable;… [Phys. Rev. A 95, 023815] Published Wed Feb 08, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Preparation of a single-photon dark state in a chiral quantum system (2017)

Fengzheng Zhu, Teng Zhao, Hebin Zhang, Gao-xiang Li, and Zbigniew Ficek

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Fengzheng Zhu, Teng Zhao, Hebin Zhang, Gao-xiang Li, and Zbigniew Ficek We examine conditions under which an open quantum system composed of a driven degenerated parametric oscillator cavity and a driven two-level atom coupled to a waveguide could decay to a pure dark state rather than the expected mixed state. The calculations are carried out analytically in a low-dime… [Phys. Rev. A 95, 023817] Published Wed Feb 08, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Extreme events following bifurcation to spatiotemporal chaos in a spatially extended microcavity laser (2017)

S. Coulibaly, M. G. Clerc, F. Selmi, and S. Barbay

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): S. Coulibaly, M. G. Clerc, F. Selmi, and S. Barbay The occurrence of extreme events in a spatially extended microcavity laser has been recently reported [Selmi et al. , Phys. Rev. Lett. 116 , 013901 (2016) ] to be correlated to emergence of spatiotemporal chaos. In this dissipative system, the role of spatial coupling through diffraction is essential … [Phys. Rev. A 95, 023816] Published Wed Feb 08, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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11

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Casimir force between hyperbolic metamaterials (2017)

Ge Song, Jingping Xu, Chengjie Zhu, Pengfei He, Yaping Yang, and Shi-Yao Zhu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Ge Song, Jingping Xu, Chengjie Zhu, Pengfei He, Yaping Yang, and Shi-Yao Zhu The Casimir force between two hyperbolic metamaterials (HMMs) constructed by alternative metal-dielectric layers is investigated. Due to the existence of the hyperbolic dispersion, the electromagnetic response of HMMs becomes extremely dramatic, which is embodied by the nearly total reflection in su… [Phys. Rev. A 95, 023814] Published Tue Feb 07, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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12

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Control of Fano resonances and slow light using Bose-Einstein condensates in a nanocavity (2017)

M. Javed Akram, Fazal Ghafoor, M. Miskeen Khan, and Farhan Saif

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): M. Javed Akram, Fazal Ghafoor, M. Miskeen Khan, and Farhan Saif In this study, a standing wave in an optical nanocavity with Bose-Einstein condensate (BEC) constitutes a one-dimensional optical lattice potential in the presence of a finite two bodies atomic interaction. We report that the interaction of a BEC with a standing field in an optical cavity coherently… [Phys. Rev. A 95, 023810] Published Mon Feb 06, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Motion-induced enhancement of Rabi coupling between atomic ensembles in cavity optomechanics (2017)

Anil Kumar Chauhan and Asoka Biswas

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Anil Kumar Chauhan and Asoka Biswas We propose a scheme of enhancement of Rabi coupling between two identical atomic ensembles trapped inside an optical cavity in a membrane-in-the-middle setup. The cavity modes dispersively interact with the ensembles and the effective interaction between the ensembles is governed by the tunneling ra… [Phys. Rev. A 95, 023813] Published Mon Feb 06, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Determining the first-order character of La(Fe,Mn,Si)_{13} (2017)

Milan Bratko, Edmund Lovell, A. David Caplin, Vittorio Basso, Alexander Barcza, Matthias Katter, and Lesley F. Cohen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Milan Bratko, Edmund Lovell, A. David Caplin, Vittorio Basso, Alexander Barcza, Matthias Katter, and Lesley F. Cohen Definitive determination of first-order character of the magnetocaloric magnetic transition remains elusive. Here we use a microcalorimetry technique in two modes of operation to determine the contributions to entropy change from latent heat and heat capacity separately in an engineered set of La ( Fe … [Phys. Rev. B 95, 064411] Published Mon Feb 13, 2017

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

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Evolution of structure, magnetism, and electronic transport in the doped pyrochlore iridate Y_{2} Ir_{2−x} Ru_{x} O_{7} (2017)

Harish Kumar, R. S. Dhaka, and A. K. Pramanik

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Harish Kumar, R. S. Dhaka, and A. K. Pramanik The interplay between spin-orbit coupling (SOC) and electron correlation ( U ) is considered for many exotic phenomena in iridium oxides. We have investigated the evolution of structural, magnetic, and electronic properties in the pyrochlore iridate Y 2 Ir 2 − x Ru x O 7 where the substitution of Ru has been a… [Phys. Rev. B 95, 054415] Published Mon Feb 13, 2017

Schlagwort(e): Magnetism

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Thermal conductivity of local moment models with strong spin-orbit coupling (2017)

Georgios L. Stamokostas, Panteleimon E. Lapas, and Gregory A. Fiete

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Georgios L. Stamokostas, Panteleimon E. Lapas, and Gregory A. Fiete We study the magnetic and lattice contributions to the thermal conductivity of electrically insulating strongly spin-orbit coupled magnetically ordered phases on a two-dimensional honeycomb lattice using the Kitaev-Heisenberg model. Depending on model parameters, such as the relative strength of the… [Phys. Rev. B 95, 064410] Published Mon Feb 13, 2017

Schlagwort(e): Magnetism

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17

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Thermally induced magnon accumulation in two-sublattice magnets (2017)

Ulrike Ritzmann, Denise Hinzke, and Ulrich Nowak

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Ulrike Ritzmann, Denise Hinzke, and Ulrich Nowak We present a temperature-dependent study of the thermal excitation of a magnon accumulation in two-sublattice magnetic materials. Using atomistic spin model simulations, we study the local magnetization profiles sublattice-wise in the vicinity of a temperature step in antiferromagnets, as well as in… [Phys. Rev. B 95, 054411] Published Wed Feb 08, 2017

Schlagwort(e): Magnetism

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DFT investigation of the effect of spin-orbit coupling on the NMR shifts in paramagnetic solids (2017)

Roberta Pigliapochi, Andrew J. Pell, Ieuan D. Seymour, Clare P. Grey, Davide Ceresoli, and Martin Kaupp

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Roberta Pigliapochi, Andrew J. Pell, Ieuan D. Seymour, Clare P. Grey, Davide Ceresoli, and Martin Kaupp Nuclear magnetic resonance (NMR) spectroscopy is a powerful tool for studying the structural and electronic properties of paramagnetic solids. However, the interpretation of paramagnetic NMR spectra is often challenging as a result of the interactions of unpaired electrons with the nuclear spins of … [Phys. Rev. B 95, 054412] Published Wed Feb 08, 2017

Schlagwort(e): Magnetism

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Spin transfer torque ferromagnetic resonance induced spin pumping in the Fe/Pd bilayer system (2017)

A. Kumar, S. Akansel, H. Stopfel, M. Fazlali, J. Åkerman, R. Brucas, and P. Svedlindh

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): A. Kumar, S. Akansel, H. Stopfel, M. Fazlali, J. Åkerman, R. Brucas, and P. Svedlindh Inconsistencies in estimates of the spin Hall angle ( θ S H ) and spin diffusion length ( λ S D ) of nonmagnetic (NM) layers using the spin transfer torque ferromagnetic resonance (ST-FMR) in ferromagnetic FM/NM bilayer structures are attributed to the inverse spin Hall effect (ISHE) and interfacial paramet… [Phys. Rev. B 95, 064406] Published Wed Feb 08, 2017

Schlagwort(e): Magnetism

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J_{1} −J_{2} square-lattice Heisenberg antiferromagnets with 4d^{1} spins: AMoOPO_{4} Cl (A=K,Rb) (2017)

Hajime Ishikawa, Nanako Nakamura, Makoto Yoshida, Masashi Takigawa, Peter Babkevich, Navid Qureshi, Henrik M. Rønnow, Takeshi Yajima, and Zenji Hiroi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Hajime Ishikawa, Nanako Nakamura, Makoto Yoshida, Masashi Takigawa, Peter Babkevich, Navid Qureshi, Henrik M. Rønnow, Takeshi Yajima, and Zenji Hiroi Magnetic properties of A MoOP O 4 Cl ( A = K , Rb ) with M o 5 + ions in the 4 d 1 electronic configuration are investigated by magnetization, heat capacity, and nuclear magnetic resonance (NMR) measurements on single crystals, combined with powder neutron diffraction experiments. The magnetization measurements re… [Phys. Rev. B 95, 064408] Published Wed Feb 08, 2017

Schlagwort(e): Magnetism

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Method for estimating spin-spin interactions from magnetization curves (2017)

Ryo Tamura and Koji Hukushima

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Ryo Tamura and Koji Hukushima We develop a method to estimate the spin-spin interactions in the Hamiltonian from the observed magnetization curve by machine learning based on Bayesian inference. In our method, plausible spin-spin interactions are determined by maximizing the posterior distribution, which is the conditional proba… [Phys. Rev. B 95, 064407] Published Wed Feb 08, 2017

Schlagwort(e): Magnetism

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Spin pseudogap in the S=1/2 chain material Sr_{2} CuO_{3} with impurities (2017)

G. Simutis, S. Gvasaliya, N. S. Beesetty, T. Yoshida, J. Robert, S. Petit, A. I. Kolesnikov, M. B. Stone, F. Bourdarot, H. C. Walker, D. T. Adroja, O. Sobolev, C. Hess, T. Masuda, A. Revcolevschi, B. Büchner, and A. Zheludev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): G. Simutis, S. Gvasaliya, N. S. Beesetty, T. Yoshida, J. Robert, S. Petit, A. I. Kolesnikov, M. B. Stone, F. Bourdarot, H. C. Walker, D. T. Adroja, O. Sobolev, C. Hess, T. Masuda, A. Revcolevschi, B. Büchner, and A. Zheludev The low-energy magnetic excitation spectrum of the Heisenberg antiferromagnetic S = 1 / 2 chain system Sr 2 CuO 3 with Ni and Ca impurities is studied by neutron spectroscopy. In all cases, a defect-induced spectral pseudogap is observed and shown to scale proportionately to the number of scattering center… [Phys. Rev. B 95, 054409] Published Tue Feb 07, 2017

Schlagwort(e): Magnetism

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Crystal electric field excitations in the quasicrystal approximant TbCd_{6} studied by inelastic neutron scattering (2017)

Pinaki Das, P.-F. Lory, R. Flint, T. Kong, T. Hiroto, S. L. Bud'ko, P. C. Canfield, M. de Boissieu, A. Kreyssig, and A. I. Goldman

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Pinaki Das, P.-F. Lory, R. Flint, T. Kong, T. Hiroto, S. L. Bud'ko, P. C. Canfield, M. de Boissieu, A. Kreyssig, and A. I. Goldman We have performed inelastic neutron scattering measurements on powder samples of the quasicrystal approximant, TbCd 6 , grown using isotopically enriched Cd 112 . Both quasielastic scattering and distinct inelastic excitations were observed below 3 meV. The intensity of the quasielastic scattering measu… [Phys. Rev. B 95, 054408] Published Tue Feb 07, 2017

Schlagwort(e): Magnetism

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Glass Transitions in Monodisperse Cluster-Forming Ensembles: Vortex Matter in Type-1.5 Superconductors (2017)

Rogelio Díaz-Méndez, Fabio Mezzacapo, Wolfgang Lechner, Fabio Cinti, Egor Babaev, and Guido Pupillo

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Rogelio Díaz-Méndez, Fabio Mezzacapo, Wolfgang Lechner, Fabio Cinti, Egor Babaev, and Guido Pupillo At low enough temperatures and high densities, the equilibrium configuration of an ensemble of ultrasoft particles is a self-assembled, ordered, cluster crystal. In the present Letter, we explore the out-of-equilibrium dynamics for a two-dimensional realization, which is relevant to superconducting … [Phys. Rev. Lett. 118, 067001] Published Wed Feb 08, 2017

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Landau-Zener-Stückelberg Interferometry in Quantum Dots with Fast Rise Times: Evidence for Coherent Phonon Driving (2017)

M. Korkusinski, S. A. Studenikin, G. Aers, G. Granger, A. Kam, and A. S. Sachrajda

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): M. Korkusinski, S. A. Studenikin, G. Aers, G. Granger, A. Kam, and A. S. Sachrajda Manipulating qubits via electrical pulses in a piezoelectric material such as GaAs can be expected to generate incidental acoustic phonons. In this Letter we determine theoretically and experimentally the consequences of these phonons for semiconductor spin qubits using Landau-Zener-Stückelberg inte… [Phys. Rev. Lett. 118, 067701] Published Wed Feb 08, 2017

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Odd-Integer Quantum Hall States and Giant Spin Susceptibility in p-Type Few-Layer WSe_{2} (2017)

Shuigang Xu, Junying Shen, Gen Long, Zefei Wu, Zhi-qiang Bao, Cheng-Cheng Liu, Xiao Xiao, Tianyi Han, Jiangxiazi Lin, Yingying Wu, Huanhuan Lu, Jianqiang Hou, Liheng An, Yuanwei Wang, Yuan Cai, K. M. Ho, Yuheng He, Rolf Lortz, Fan Zhang, and Ning Wang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Shuigang Xu, Junying Shen, Gen Long, Zefei Wu, Zhi-qiang Bao, Cheng-Cheng Liu, Xiao Xiao, Tianyi Han, Jiangxiazi Lin, Yingying Wu, Huanhuan Lu, Jianqiang Hou, Liheng An, Yuanwei Wang, Yuan Cai, K. M. Ho, Yuheng He, Rolf Lortz, Fan Zhang, and Ning Wang Transition metal dichalcogenides in a tilted magnetic field display unconventional quantum Hall transport phenomena, including a Zeeman energy that is almost three times as large as the cyclotron energy. [Phys. Rev. Lett. 118, 067702] Published Fri Feb 10, 2017

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Nuclear Magnetic Resonance Reveals Disordered Level-Crossing Physics in the Bose-Glass Regime of the Br-Doped Ni(Cl_{1−x} Br_{x} )_{2} −4SC(NH_{2} )_{2} Compound at a High Magnetic Field (2017)

Anna Orlova, Rémi Blinder, Edwin Kermarrec, Maxime Dupont, Nicolas Laflorencie, Sylvain Capponi, Hadrien Mayaffre, Claude Berthier, Armando Paduan-Filho, and Mladen Horvatić

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Anna Orlova, Rémi Blinder, Edwin Kermarrec, Maxime Dupont, Nicolas Laflorencie, Sylvain Capponi, Hadrien Mayaffre, Claude Berthier, Armando Paduan-Filho, and Mladen Horvatić By measuring the nuclear magnetic resonance (NMR) T 1 − 1 relaxation rate in the Br (bond) doped DTN compound, Ni ( Cl 1 − x Br x ) 2 − 4 SC ( NH 2 ) 2 ( DTN X ) , we show that the low-energy spin dynamics of its high magnetic field “Bose-glass” regime is dominated by a strong peak of spin fluctuations found at the nearly d… [Phys. Rev. Lett. 118, 067203] Published Thu Feb 09, 2017

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Disorder-Induced Revival of the Bose-Einstein Condensation in Ni(Cl_{1−x} Br_{x} )_{2} −4SC(NH_{2} )_{2} at High Magnetic Fields (2017)

Maxime Dupont, Sylvain Capponi, and Nicolas Laflorencie

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Maxime Dupont, Sylvain Capponi, and Nicolas Laflorencie Building on recent NMR experiments [A. Orlova et al. , Phys. Rev. Lett. 118 , 067203 (2017) .], we theoretically investigate the high magnetic field regime of the disordered quasi-one-dimensional S = 1 antiferromagnetic material Ni ( Cl 1 − x Br x ) 2 − 4 SC ( NH 2 ) 2 . The interplay between disorder, chemically controll… [Phys. Rev. Lett. 118, 067204] Published Thu Feb 09, 2017

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Electrical Detection of Spin Backflow from an Antiferromagnetic Insulator/Y_{3} Fe_{5} O_{12} Interface (2017)

Weiwei Lin and C. L. Chien

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Weiwei Lin and C. L. Chien Spin Hall magnetoresistance (SMR) has been observed in Pt / NiO / Y 3 Fe 5 O 12 (YIG) heterostructures with characteristics very different from those in Pt / YIG . This phenomenon indicates that a spin current generated by the spin Hall effect in Pt transmits through the insulating NiO and is reflected from the… [Phys. Rev. Lett. 118, 067202] Published Wed Feb 08, 2017

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Orbital Dimer Model for the Spin-Glass State in Y_{2} Mo_{2} O_{7} (2017)

Peter M. M. Thygesen, Joseph A. M. Paddison, Ronghuan Zhang, Kevin A. Beyer, Karena W. Chapman, Helen Y. Playford, Matthew G. Tucker, David A. Keen, Michael A. Hayward, and Andrew L. Goodwin

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Peter M. M. Thygesen, Joseph A. M. Paddison, Ronghuan Zhang, Kevin A. Beyer, Karena W. Chapman, Helen Y. Playford, Matthew G. Tucker, David A. Keen, Michael A. Hayward, and Andrew L. Goodwin The formation of a spin glass generally requires that magnetic exchange interactions are both frustrated and disordered. Consequently, the origin of spin-glass behavior in Y 2 Mo 2 O 7 —in which magnetic Mo 4 + ions occupy a frustrated pyrochlore lattice with minimal compositional disorder—has been a longst… [Phys. Rev. Lett. 118, 067201] Published Wed Feb 08, 2017

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Anomalous Metal Phase Emergent on the Verge of an Exciton Mott Transition (2017)

Fumiya Sekiguchi, Toshimitsu Mochizuki, Changsu Kim, Hidefumi Akiyama, Loren N. Pfeiffer, Ken W. West, and Ryo Shimano

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-02-14

Beschreibung: Author(s): Fumiya Sekiguchi, Toshimitsu Mochizuki, Changsu Kim, Hidefumi Akiyama, Loren N. Pfeiffer, Ken W. West, and Ryo Shimano We investigate the exciton Mott transition (EMT) by using optical pump-terahertz probe spectroscopy on GaAs, with realizing the condition of Mott’s gedanken experiment by the resonant excitation of 1 s excitons. We show that an anomalous metallic phase emerges on the verge of the EMT as manifested by… [Phys. Rev. Lett. 118, 067401] Published Wed Feb 08, 2017

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Quantum trajectories for propagating Fock states (2017)

Ben Q. Baragiola and Joshua Combes

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-12

Beschreibung: Author(s): Ben Q. Baragiola and Joshua Combes We derive quantum trajectories (also known as stochastic master equations) that describe an arbitrary quantum system probed by a propagating wave packet of light prepared in a continuous-mode Fock state. We consider three detection schemes of the output light: photon counting, homodyne detection, an... [Phys. Rev. A 96, 023819] Published Wed Aug 09, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Few-photon scattering on Bose-Hubbard lattices (2017)

Kim G. L. Pedersen and Mikhail Pletyukhov

American Physical Society (APS)

In: Physical Review A

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Beschreibung: Author(s): Kim G. L. Pedersen and Mikhail Pletyukhov We theoretically investigate the scattering of few-photon light on Bose-Hubbard lattices using diagrammatic scattering theory. We explicitly derive general analytical expressions for the lowest-order photonic correlation functions, which we apply numerically to several different lattices. We focus s... [Phys. Rev. A 96, 023815] Published Mon Aug 07, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Propagation of phase nonanalytical points in fast- and slow-light media (2017)

Yuma Morita and Makoto Tomita

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-12

Beschreibung: Author(s): Yuma Morita and Makoto Tomita We performed a series of experiments to examine the arrival of phase nonanalytical points in fast- and slow-light media, using a Gaussian-shaped temporal pulse and encoding phase nonanalytical points at various positions within the pulse envelope. For the phase nonanalytical points, the amplitude of... [Phys. Rev. A 96, 023813] Published Mon Aug 07, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Enhanced detection of a low-frequency signal by using broad squeezed light and a bichromatic local oscillator (2017)

Wei Li, Yuanbin Jin, Xudong Yu, and Jing Zhang

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-12

Beschreibung: Author(s): Wei Li, Yuanbin Jin, Xudong Yu, and Jing Zhang We experimentally study a protocol of using the broadband high-frequency squeezed vacuum to detect the low-frequency signal. In this scheme, the lower sideband field of the squeezed light carries the low-frequency modulation signal, and the two strong coherent light fields are applied as the bichrom... [Phys. Rev. A 96, 023808] Published Fri Aug 04, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Analytical description of the mode hybridization in a restricted two-dimensional model for an electromagnetic cavity containing a thin magnetized slab (2017)

V. V. Dodonov and A. V. Dodonov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-12

Beschreibung: Author(s): V. V. Dodonov and A. V. Dodonov Analytical solutions to the problem of mode splitting caused by a thin plain magnetized slab placed in a rectangular electromagnetic cavity are found in two special cases: an infinite slab between two ideal infinite plain mirrors (1D model) and a 2D model of a cavity confined in the direction of per... [Phys. Rev. B 96, 054419] Published Fri Aug 11, 2017

Schlagwort(e): Magnetism

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Investigation of the commensurate magnetic structure in the heavy-fermion compound ${\mathrm{CePt}}_{2}{\mathrm{In}}_{7}$ using magnetic resonant x-ray diffraction (2017)

Nicolas Gauthier, Didier Wermeille, Nicola Casati, Hironori Sakai, Ryan E. Baumbach, Eric D. Bauer, and Jonathan S. White

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-12

Beschreibung: Author(s): Nicolas Gauthier, Didier Wermeille, Nicola Casati, Hironori Sakai, Ryan E. Baumbach, Eric D. Bauer, and Jonathan S. White We investigated the magnetic structure of the heavy-fermion compound CePt 2 In 7 below T N = 5.34 ( 2 ) K using magnetic resonant x-ray diffraction at ambient pressure. The magnetic order is characterized by a commensurate propagation vector k 1 / 2 = 1 2 , 1 2 , 1 2 with spins lying in the basal plane. Our measurements... [Phys. Rev. B 96, 064414] Published Thu Aug 10, 2017

Schlagwort(e): Magnetism

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Entanglement of condensed magnons via momentum-space fragmentation (2017)

Clement H. Wong and Ari Mizel

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-12

Beschreibung: Author(s): Clement H. Wong and Ari Mizel A scheme is presented for engineering momentum-space entanglement of fragmented magnon condensates. We consider easy-plane frustrated antiferromagnets in which the magnon dispersion has degenerate minima that represent “umbrella” chiral spin textures. We tune the Hamiltonian near a quantum critical ... [Phys. Rev. B 96, 054412] Published Wed Aug 09, 2017

Schlagwort(e): Magnetism

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Proposal for quantum many-body simulation and torsional matter-wave interferometry with a levitated nanodiamond (2017)

Yue Ma, Thai M. Hoang, Ming Gong, Tongcang Li, and Zhang-qi Yin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-12

Beschreibung: Author(s): Yue Ma, Thai M. Hoang, Ming Gong, Tongcang Li, and Zhang-qi Yin Hybrid spin-mechanical systems have great potential in sensing, macroscopic quantum mechanics, and quantum information science. In order to induce strong coupling between an electron spin and the center-of-mass motion of a mechanical oscillator, a large magnetic gradient usually is required, which i... [Phys. Rev. A 96, 023827] Published Thu Aug 10, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Cavity-induced anticorrelated photon-emission rates of a single ion (2017)

Hiroki Takahashi, Ezra Kassa, Costas Christoforou, and Matthias Keller

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-12

Beschreibung: Author(s): Hiroki Takahashi, Ezra Kassa, Costas Christoforou, and Matthias Keller We report on the alteration of photon-emission properties of a single trapped ion coupled to a high-finesse optical fiber cavity. We show that the vacuum field of the cavity can simultaneously affect the emissions in both the infrared (IR) and ultraviolet (UV) branches of the Λ -type level system of ... [Phys. Rev. A 96, 023824] Published Thu Aug 10, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Raman Scattering from Higgs Mode Oscillations in the Two-Dimensional Antiferromagnet ${\mathrm{Ca}}_{2}{\mathrm{RuO}}_{4}$ (2017)

Sofia-Michaela Souliou, Jiří Chaloupka, Giniyat Khaliullin, Gihun Ryu, Anil Jain, B. J. Kim, Matthieu Le Tacon, and Bernhard Keimer

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): Sofia-Michaela Souliou, Jiří Chaloupka, Giniyat Khaliullin, Gihun Ryu, Anil Jain, B. J. Kim, Matthieu Le Tacon, and Bernhard Keimer We present and analyze Raman spectra of the Mott insulator Ca 2 RuO 4 , whose quasi-two-dimensional antiferromagnetic order has been described as a condensate of low-lying spin-orbit excitons with angular momentum J eff = 1 . In the A g polarization geometry, the amplitude (Higgs) mode of the spin-orbit cond... [Phys. Rev. Lett. 119, 067201] Published Tue Aug 08, 2017

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Spin Order and Phase Transitions in Chains of Polariton Condensates (2017)

H. Ohadi, A. J. Ramsay, H. Sigurdsson, Y. del Valle-Inclan Redondo, S. I. Tsintzos, Z. Hatzopoulos, T. C. H. Liew, I. A. Shelykh, Y. G. Rubo, P. G. Savvidis, and J. J. Baumberg

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): H. Ohadi, A. J. Ramsay, H. Sigurdsson, Y. del Valle-Inclan Redondo, S. I. Tsintzos, Z. Hatzopoulos, T. C. H. Liew, I. A. Shelykh, Y. G. Rubo, P. G. Savvidis, and J. J. Baumberg We demonstrate that multiply coupled spinor polariton condensates can be optically tuned through a sequence of spin-ordered phases by changing the coupling strength between nearest neighbors. For closed four-condensate chains these phases span from ferromagnetic (FM) to antiferromagnetic (AFM), sepa... [Phys. Rev. Lett. 119, 067401] Published Tue Aug 08, 2017

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Conductance of a Freestanding Conjugated Molecular Wire (2017)

Torben Jasper-Tönnies, Aran Garcia-Lekue, Thomas Frederiksen, Sandra Ulrich, Rainer Herges, and Richard Berndt

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): Torben Jasper-Tönnies, Aran Garcia-Lekue, Thomas Frederiksen, Sandra Ulrich, Rainer Herges, and Richard Berndt The conductance of a molecule standing perpendicular to a substrate is found to be dependent on the geometry, orbital symmetries, and bonds of the molecule. [Phys. Rev. Lett. 119, 066801] Published Mon Aug 07, 2017

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Skyrme Insulators: Insulators at the Brink of Superconductivity (2017)

Onur Erten, Po-Yao Chang, Piers Coleman, and Alexei M. Tsvelik

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-08-12

Beschreibung: Author(s): Onur Erten, Po-Yao Chang, Piers Coleman, and Alexei M. Tsvelik Current theories of superfluidity are based on the idea of a coherent quantum state with topologically protected quantized circulation. When this topological protection is absent, as in the case of He 3 − A , the coherent quantum state no longer supports persistent superflow. Here, we argue that the los... [Phys. Rev. Lett. 119, 057603] Published Fri Aug 04, 2017

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Enhanced Spin Conductance of a Thin-Film Insulating Antiferromagnet (2017)

Scott A. Bender, Hans Skarsvåg, Arne Brataas, and Rembert A. Duine

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-08-12

Beschreibung: Author(s): Scott A. Bender, Hans Skarsvåg, Arne Brataas, and Rembert A. Duine We investigate spin transport by thermally excited spin waves in an antiferromagnetic insulator. Starting from a stochastic Landau-Lifshitz-Gilbert phenomenology, we obtain the out-of-equilibrium spin-wave properties. In linear response to spin biasing and a temperature gradient, we compute the spin... [Phys. Rev. Lett. 119, 056804] Published Fri Aug 04, 2017

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Phononic Josephson oscillation and self-trapping with two-phonon exchange interaction (2017)

Xun-Wei Xu, Ai-Xi Chen, and Yu-xi Liu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-15

Beschreibung: Author(s): Xun-Wei Xu, Ai-Xi Chen, and Yu-xi Liu We propose a bosonic Josephson junction (BJJ) in two nonlinear mechanical resonators coupled through two-phonon exchange interaction induced by quadratic optomechanical couplings. The nonlinear dynamical equations and effective Hamiltonian are derived to describe behaviors of the BJJ. We show that t... [Phys. Rev. A 96, 023832] Published Mon Aug 14, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Correlation between structure, electronic properties, and magnetism in ${\mathrm{Co}}_{x}{\mathrm{Gd}}_{1−x}$ thin amorphous films (2017)

N. Bergeard, A. Mougin, M. Izquierdo, E. Fonda, and F. Sirotti

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-15

Beschreibung: Author(s): N. Bergeard, A. Mougin, M. Izquierdo, E. Fonda, and F. Sirotti Correlation between structure, electronic properties, and magnetism in Co x Gd 1 − x thin amorphous films was investigated. The thickness averaged properties of covered thin films are consistent with those of in-depth homogeneous amorphous alloys. In spite of that, x-ray magnetic circular dichroism (XMCD... [Phys. Rev. B 96, 064418] Published Mon Aug 14, 2017

Schlagwort(e): Magnetism

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Tuning Perpendicular Magnetic Anisotropy by Oxygen Octahedral Rotations in $({\mathrm{La}}_{1−x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3})/({\mathrm{SrIrO}}_{3})$ Superlattices (2017)

Di Yi, Charles L. Flint, Purnima P. Balakrishnan, Krishnamurthy Mahalingam, Brittany Urwin, Arturas Vailionis, Alpha T. N’Diaye, Padraic Shafer, Elke Arenholz, Yongseong Choi, Kevin H. Stone, Jiun-Haw Chu, Brandon M. Howe, Jian Liu, Ian R. Fisher, and Yuri Suzuki

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-08-15

Beschreibung: Author(s): Di Yi, Charles L. Flint, Purnima P. Balakrishnan, Krishnamurthy Mahalingam, Brittany Urwin, Arturas Vailionis, Alpha T. N’Diaye, Padraic Shafer, Elke Arenholz, Yongseong Choi, Kevin H. Stone, Jiun-Haw Chu, Brandon M. Howe, Jian Liu, Ian R. Fisher, and Yuri Suzuki Perpendicular magnetic anisotropy (PMA) plays a critical role in the development of spintronics, thereby demanding new strategies to control PMA. Here we demonstrate a conceptually new type of interface induced PMA that is controlled by oxygen octahedral rotation. In superlattices comprised of La 1 − x ... [Phys. Rev. Lett. 119, 077201] Published Mon Aug 14, 2017

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Adiabatic transfer of energy fluctuations between membranes inside an optical cavity (2017)

Devender Garg, Anil K. Chauhan, and Asoka Biswas

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-16

Beschreibung: Author(s): Devender Garg, Anil K. Chauhan, and Asoka Biswas A scheme is presented for the adiabatic transfer of average fluctuations in the phonon number between two membranes in an optical cavity. We show that by driving the cavity modes with external time-delayed pulses, one can obtain an effect analogous to stimulated Raman adiabatic passage in the atomic... [Phys. Rev. A 96, 023837] Published Tue Aug 15, 2017

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Highly entangled photon pairs generated from the biexciton cascade transition in a quantum-dot–metal-nanoparticle hybrid system (2017)

T. Moradi, M. Bagheri Harouni, and M. H. Naderi

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-16

Beschreibung: Author(s): T. Moradi, M. Bagheri Harouni, and M. H. Naderi The entanglement between photon pairs generated from the biexciton cascade transition in a semiconductor quantum dot located in the vicinity of a metal nanoparticle is theoretically investigated. In the model scheme, the biexciton-exciton and exciton–ground-state transitions are assumed to be couple... [Phys. Rev. A 96, 023836] Published Tue Aug 15, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Nonleaky and accelerated population transfer in a transmon qutrit (2017)

Xiao-Jing Lu, M. Li, Z. Y. Zhao, Chun-Li Zhang, Hong-Pei Han, Zhi-Bo Feng, and Yun-Qing Zhou

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-23

Beschreibung: Author(s): Xiao-Jing Lu, M. Li, Z. Y. Zhao, Chun-Li Zhang, Hong-Pei Han, Zhi-Bo Feng, and Yun-Qing Zhou We propose a theoretical scheme for implementing nonleaky and accelerated population transfer with a transmon qutrit. For a transmon-regime artificial atom with weak level anharmonicity, the leakage effects on the target population transfer are considerable. Allowed by the level-transition rule, a t... [Phys. Rev. A 96, 023843] Published Mon Aug 21, 2017

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Spin density in ${\mathrm{YTiO}}_{3}$: I. Joint refinement of polarized neutron diffraction and magnetic x-ray diffraction data leading to insights into orbital ordering (2017)

I. A. Kibalin, Z. Yan, A. B. Voufack, S. Gueddida, B. Gillon, A. Gukasov, F. Porcher, A. M. Bataille, F. Morini, N. Claiser, M. Souhassou, C. Lecomte, J.-M. Gillet, M. Ito, K. Suzuki, H. Sakurai, Y. Sakurai, C. M. Hoffmann, and X. P. Wang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-23

Beschreibung: Author(s): I. A. Kibalin, Z. Yan, A. B. Voufack, S. Gueddida, B. Gillon, A. Gukasov, F. Porcher, A. M. Bataille, F. Morini, N. Claiser, M. Souhassou, C. Lecomte, J.-M. Gillet, M. Ito, K. Suzuki, H. Sakurai, Y. Sakurai, C. M. Hoffmann, and X. P. Wang Orbital ordering below 30 K was previously observed in the ferromagnetic YTiO 3 compound both by polarized neutron diffraction (PND) and x-ray magnetic diffraction (XMD). In this paper we report a procedure for the joint refinement of a unique spin-density model based on both PND and XMD data. The di... [Phys. Rev. B 96, 054426] Published Mon Aug 21, 2017

Schlagwort(e): Magnetism

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Giant spin-charge conversion driven by nanoscopic particles of Ag in Pt (2017)

O. Alves-Santos, E. F. Silva, M. Gamino, R. O. Cunha, J. B. S. Mendes, R. L. Rodríguez-Suárez, S. M. Rezende, and A. Azevedo

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-23

Beschreibung: Author(s): O. Alves-Santos, E. F. Silva, M. Gamino, R. O. Cunha, J. B. S. Mendes, R. L. Rodríguez-Suárez, S. M. Rezende, and A. Azevedo We report the observation of a giant enhancement in the interconversion efficiency between spin current and charge current by the spin Hall effect made possible with the use of nanoscopic structures of Ag in a Pt layer. We fabricate heterostructures of yttrium iron garnet (YIG)/Pt, in which nanopart... [Phys. Rev. B 96, 060408(R)] Published Mon Aug 21, 2017

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Excitation spectrum and density matrix renormalization group iterations (2017)

Natalia Chepiga and Frédéric Mila

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-23

Beschreibung: Author(s): Natalia Chepiga and Frédéric Mila We show that, in certain circumstances, exact excitation energies appear as locally site-independent (or flat) modes if one records the excitation spectrum of the effective Hamiltonian while sweeping through the lattice in the variational matrix-product-state formulation of the density matrix renorm... [Phys. Rev. B 96, 054425] Published Mon Aug 21, 2017

Schlagwort(e): Magnetism

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Spinon confinement in a quasi-one-dimensional anisotropic Heisenberg magnet (2017)

A. K. Bera, B. Lake, F. H. L. Essler, L. Vanderstraeten, C. Hubig, U. Schollwöck, A. T. M. N. Islam, A. Schneidewind, and D. L. Quintero-Castro

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-23

Beschreibung: Author(s): A. K. Bera, B. Lake, F. H. L. Essler, L. Vanderstraeten, C. Hubig, U. Schollwöck, A. T. M. N. Islam, A. Schneidewind, and D. L. Quintero-Castro Confinement – the process by which particles with fractional quantum numbers bind to form quasiparticles with integer quantum numbers – is as important to condensed matter as to particle physics. By a combination of inelastic neutron scattering experiments and theoretical calculations, the authors establish the compound SrCo 2 V 2 O 8 as a beautiful paradigm for spinon confinement in a quasi-one-dimensional quantum magnet. In particular, using state-of-the-art theoretical techniques, the authors provide a quantitative and macroscopic explanation for the existence of free spinons above the ordering temperature. They also explain how those spinons get confined into pairs with transverse and longitudinal polarizations by interchain interactions as well as how these bound pairs evolve with temperature. [Phys. Rev. B 96, 054423] Published Thu Aug 17, 2017

Schlagwort(e): Magnetism

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Odd-Frequency Superconductivity in ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ Measured by Kerr Rotation (2017)

L. Komendová and A. M. Black-Schaffer

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-08-23

Beschreibung: Author(s): L. Komendová and A. M. Black-Schaffer We establish the existence of bulk odd-frequency superconductivity in Sr 2 RuO 4 and show that an intrinsic Kerr effect is direct evidence of this state. We use both general two- and three-orbital models, as well as a realistic tight-binding description of Sr 2 RuO 4 to demonstrate that odd-frequency pair... [Phys. Rev. Lett. 119, 087001] Published Mon Aug 21, 2017

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Full-Gap Superconductivity Robust against Disorder in Heavy-Fermion ${\mathrm{CeCu}}_{2}{\mathrm{Si}}_{2}$ (2017)

T. Takenaka, Y. Mizukami, J. A. Wilcox, M. Konczykowski, S. Seiro, C. Geibel, Y. Tokiwa, Y. Kasahara, C. Putzke, Y. Matsuda, A. Carrington, and T. Shibauchi

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-08-23

Beschreibung: Author(s): T. Takenaka, Y. Mizukami, J. A. Wilcox, M. Konczykowski, S. Seiro, C. Geibel, Y. Tokiwa, Y. Kasahara, C. Putzke, Y. Matsuda, A. Carrington, and T. Shibauchi Magnetic penetration depth measurements show that the superconducting gap in this iconic heavy-fermion superconductor is robust against the introduction of disorder, ruling out some superconductivity mechanisms as explanations. [Phys. Rev. Lett. 119, 077001] Published Fri Aug 18, 2017

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Room-Temperature Spin-Orbit Torque Switching Induced by a Topological Insulator (2017)

Jiahao Han, A. Richardella, Saima A. Siddiqui, Joseph Finley, N. Samarth, and Luqiao Liu

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-08-23

Beschreibung: Author(s): Jiahao Han, A. Richardella, Saima A. Siddiqui, Joseph Finley, N. Samarth, and Luqiao Liu The strongly spin-momentum coupled electronic states in topological insulators (TI) have been extensively pursued to realize efficient magnetic switching. However, previous studies show a large discrepancy of the charge-spin conversion efficiency. Moreover, current-induced magnetic switching with TI... [Phys. Rev. Lett. 119, 077702] Published Fri Aug 18, 2017

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Simultaneous control of the Dzyaloshinskii-Moriya interaction and magnetic anisotropy in nanomagnetic trilayers (2017)

A. L. Balk, K-W. Kim, D. T. Pierce, M. D. Stiles, J. Unguris, and S. M. Stavis

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-08-23

Beschreibung: Author(s): A. L. Balk, K-W. Kim, D. T. Pierce, M. D. Stiles, J. Unguris, and S. M. Stavis Magneto-optical Kerr effect (MOKE) microscopy measurements of magnetic bubble domains demonstrate that Ar + irradiation around 100 eV can tune the Dzyaloshinskii-Moriya interaction (DMI) in Pt / Co / Pt trilayers. Varying the irradiation energy and dose changes the DMI sign and magnitude separately from ... [Phys. Rev. Lett. 119, 077205] Published Thu Aug 17, 2017

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Reversed interplay of quantum interference and which-way information in multiphoton entangled states (2017)

Young-Sik Ra, Malte C. Tichy, Hyang-Tag Lim, Clemens Gneiting, Klaus Mølmer, Andreas Buchleitner, and Yoon-Ho Kim

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-24

Beschreibung: Author(s): Young-Sik Ra, Malte C. Tichy, Hyang-Tag Lim, Clemens Gneiting, Klaus Mølmer, Andreas Buchleitner, and Yoon-Ho Kim We report experimental studies of quantum interference of multiphoton states impinging on a two-port balanced beam splitter. When the distinguishability between the two input paths is increased, we observe a reduction followed by a resurgence of the interference visibility in multiphoton coincidence... [Phys. Rev. A 96, 023845] Published Tue Aug 22, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Terahertz dielectric analysis and spin-phonon coupling in multiferroic ${\mathrm{GeV}}_{4}{\mathrm{S}}_{8}$ (2017)

Matthew T. Warren, G. Pokharel, A. D. Christianson, D. Mandrus, and R. Valdés Aguilar

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-24

Beschreibung: Author(s): Matthew T. Warren, G. Pokharel, A. D. Christianson, D. Mandrus, and R. Valdés Aguilar We present an investigation of the multiferroic lacunar spinel compound GeV 4 S 8 using time-domain terahertz spectroscopy. We find three absorptions which either appear or shift at the antiferromagnetic transition temperature, T N = 17 K , as S = 1 magnetic moments develop on vanadium tetrahedra. Two of thes... [Phys. Rev. B 96, 054432] Published Wed Aug 23, 2017

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Experimental characterization of photon-number noise in Rarity-Tapster-Loudon-type interferometers (2017)

Vojtěch Trávníček, Karol Bartkiewicz, Antonín Černoch, and Karel Lemr

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-24

Beschreibung: Author(s): Vojtěch Trávníček, Karol Bartkiewicz, Antonín Černoch, and Karel Lemr In this paper, we develop a simple model describing inherent photon-number noise in Rarity-Tapster-Loudon-type interferometers. This noise is caused by generating photon pairs in the process of spontaneous parametric down-conversion and adding a third photon by attenuating the fundamental laser mode... [Phys. Rev. A 96, 023847] Published Tue Aug 22, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Exact zero modes in frustrated Haldane chains (2017)

Natalia Chepiga and Frédéric Mila

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-25

Beschreibung: Author(s): Natalia Chepiga and Frédéric Mila We show that the effective coupling between the spin-1/2 edge states of a spin-1 chain of finite length can be continuously tuned by frustration. For the J 1 − J 2 model with nearest- and next-nearest-neighbor antiferromagnetic interactions, we show that the effective coupling in a chain of length L cha... [Phys. Rev. B 96, 060409(R)] Published Thu Aug 24, 2017

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Origin of Superconductivity and Latent Charge Density Wave in ${\mathrm{NbS}}_{2}$ (2017)

Christoph Heil, Samuel Poncé, Henry Lambert, Martin Schlipf, Elena R. Margine, and Feliciano Giustino

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-08-25

Beschreibung: Author(s): Christoph Heil, Samuel Poncé, Henry Lambert, Martin Schlipf, Elena R. Margine, and Feliciano Giustino We elucidate the origin of the phonon-mediated superconductivity in 2 H - NbS 2 using the ab initio anisotropic Migdal-Eliashberg theory including Coulomb interactions. We demonstrate that superconductivity is associated with Fermi surface hot spots exhibiting an unusually strong electron-phonon interac... [Phys. Rev. Lett. 119, 087003] Published Thu Aug 24, 2017

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Non-Fermi Liquid Behavior and Continuously Tunable Resistivity Exponents in the Anderson-Hubbard Model at Finite Temperature (2017)

Niravkumar D. Patel, Anamitra Mukherjee, Nitin Kaushal, Adriana Moreo, and Elbio Dagotto

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-08-25

Beschreibung: Author(s): Niravkumar D. Patel, Anamitra Mukherjee, Nitin Kaushal, Adriana Moreo, and Elbio Dagotto We employ a recently developed computational many-body technique to study for the first time the half-filled Anderson-Hubbard model at finite temperature and arbitrary correlation U and disorder V strengths. Interestingly, the narrow zero temperature metallic range induced by disorder from the Mott ... [Phys. Rev. Lett. 119, 086601] Published Thu Aug 24, 2017

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Einstein's magnum opus (2017)

Robinson, A.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2017-08-25

Schlagwort(e): Physics

Print ISSN: 0036-8075

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Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

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Optically Discriminating Carrier-Induced Quasiparticle Band Gap and Exciton Energy Renormalization in Monolayer ${\mathrm{MoS}}_{2}$ (2017)

Kaiyuan Yao, Aiming Yan, Salman Kahn, Aslihan Suslu, Yufeng Liang, Edward S. Barnard, Sefaattin Tongay, Alex Zettl, Nicholas J. Borys, and P. James Schuck

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-08-26

Beschreibung: Author(s): Kaiyuan Yao, Aiming Yan, Salman Kahn, Aslihan Suslu, Yufeng Liang, Edward S. Barnard, Sefaattin Tongay, Alex Zettl, Nicholas J. Borys, and P. James Schuck Optoelectronic excitations in monolayer MoS 2 manifest from a hierarchy of electrically tunable, Coulombic free-carrier and excitonic many-body phenomena. Investigating the fundamental interactions underpinning these phenomena—critical to both many-body physics exploration and device applications—pre... [Phys. Rev. Lett. 119, 087401] Published Fri Aug 25, 2017

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Magnetic hexadecapole order and magnetopiezoelectric metal state in ${\mathbf{Ba}}_{1−x}{\mathbf{K}}_{x}{\mathbf{Mn}}_{2}{\mathbf{As}}_{2}$ (2017)

Hikaru Watanabe and Youichi Yanase

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-29

Beschreibung: Author(s): Hikaru Watanabe and Youichi Yanase Odd-parity magnetic multipole order, where time-reversal and space-inversion symmetries are spontaneously broken, may open a new paradigm in the fields of multipole physics, multiferroics, and spintronics. BaMn 2 As 2 is a new candidate material. Here, the authors theoretically identify that the seemingly simple antiferromagnetic order in BaMn 2 As 2 is actually magnetic hexadecapole order mixed with magnetic quadrupole order. Interestingly, doping hole carriers realize an itinerant odd-parity magnetic multipole order. Emergent electromagnetic responses, such as magnetoelectric effect, antiferromagnetic Edelstein effect, and electric current-induced nematicity, are clarified. In particular, the current-induced nematicity is a characteristic response of an itinerant magnetic hexadecapole state and indicates a novel phase, the “magnetopiezoelectric metal”. [Phys. Rev. B 96, 064432] Published Mon Aug 28, 2017

Schlagwort(e): Magnetism

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Superradiance with local phase-breaking effects (2017)

Nathan Shammah, Neill Lambert, Franco Nori, and Simone De Liberato

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-31

Beschreibung: Author(s): Nathan Shammah, Neill Lambert, Franco Nori, and Simone De Liberato We study the superradiant evolution of a set of N two-level systems spontaneously radiating under the effect of phase-breaking mechanisms. We investigate the dynamics generated by nonradiative losses and pure dephasing, and their interplay with spontaneous emission. Our results show that in the para... [Phys. Rev. A 96, 023863] Published Wed Aug 30, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Magnon-magnon interactions in a room-temperature magnonic Bose-Einstein condensate (2017)

Oleksandr Dzyapko, Ivan Lisenkov, Patrik Nowik-Boltyk, Vladislav E. Demidov, Sergej O. Demokritov, Benny Koene, Andrei Kirilyuk, Theo Rasing, Vasyl Tiberkevich, and Andrei Slavin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-31

Beschreibung: Author(s): Oleksandr Dzyapko, Ivan Lisenkov, Patrik Nowik-Boltyk, Vladislav E. Demidov, Sergej O. Demokritov, Benny Koene, Andrei Kirilyuk, Theo Rasing, Vasyl Tiberkevich, and Andrei Slavin The Bose-Einstein condensate of magnons (mBEC) that is formed at room temperature in parametrically pumped magnetic films is doubly degenerate: it is formed simultaneously in two spectral minima corresponding to the lowest-energy magnons propagating in opposite directions along the in-plane bias mag... [Phys. Rev. B 96, 064438] Published Wed Aug 30, 2017

Schlagwort(e): Magnetism

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Evidence for a low-temperature magnetic ground state in double-perovskite iridates with $\mathrm{I}{\mathrm{r}}^{5+}(5{d}^{4})$ ions (2017)

J. Terzic, H. Zheng, Feng Ye, H. D. Zhao, P. Schlottmann, L. E. De Long, S. J. Yuan, and G. Cao

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-31

Beschreibung: Author(s): J. Terzic, H. Zheng, Feng Ye, H. D. Zhao, P. Schlottmann, L. E. De Long, S. J. Yuan, and G. Cao We report an unusual magnetic ground state in single-crystal, double-perovskite B a 2 YIr O 6 and Sr-doped B a 2 YIr O 6 with I r 5 + ( 5 d 4 ) ions. Long-range magnetic order below 1.7 K is confirmed by dc magnetization, ac magnetic susceptibility, and heat-capacity measurements. The observed magnetic order is extra... [Phys. Rev. B 96, 064436] Published Tue Aug 29, 2017

Schlagwort(e): Magnetism

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Gate-controlled magnon-assisted switching of magnetization in ferroelectric/ferromagnetic junctions (2017)

Yaojin Li, Min Chen, Jamal Berakdar, and Chenglong Jia

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-31

Beschreibung: Author(s): Yaojin Li, Min Chen, Jamal Berakdar, and Chenglong Jia Interfacing a ferromagnet with a polarized ferroelectric gate generates a nonuniform, interfacial spin density coupled to the ferroelectric polarization. This coupling allows for an electric field control of the effective field acting on the magnetization. To unravel the usefulness of this interfaci... [Phys. Rev. B 96, 054444] Published Wed Aug 30, 2017

Schlagwort(e): Magnetism

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Controlling multimode optomechanical interactions via interference (2017)

Mark C. Kuzyk and Hailin Wang

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-31

Beschreibung: Author(s): Mark C. Kuzyk and Hailin Wang We demonstrate optomechanical interference in a multimode system, in which an optical mode couples to two mechanical modes. A phase-dependent excitation-coupling approach is developed, which enables the observation of destructive interference in dynamical backactions. The destructive interference pr... [Phys. Rev. A 96, 023860] Published Tue Aug 29, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Optical spin transfer and spin-orbit torques in thin-film ferromagnets (2017)

Junwen Li and Paul M. Haney

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-08-31

Beschreibung: Author(s): Junwen Li and Paul M. Haney We study the optically induced torques in thin-film ferromagnetic layers under excitation by circularly polarized light. We study cases both with and without Rashba spin-orbit coupling using a four-band model. In the absence of Rashba spin-orbit coupling, we derive an analytic expression for the opt... [Phys. Rev. B 96, 054447] Published Wed Aug 30, 2017

Schlagwort(e): Magnetism

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Fisher information approach to nonequilibrium phase transitions in a quantum XXZ spin chain with boundary noise (2017)

Ugo Marzolino and Tomaž Prosen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-09-02

Beschreibung: Author(s): Ugo Marzolino and Tomaž Prosen We investigated quantum critical behaviors in the nonequilibrium steady state of a XXZ spin chain with boundary Markovian noise using Fisher information. The latter represents the distance between two infinitesimally close states, and its superextensive size scaling witnesses a critical behavior due... [Phys. Rev. B 96, 104402] Published Fri Sep 01, 2017

Schlagwort(e): Magnetism

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Structural and magnetic properties of epitaxial thin films of the equiatomic quaternary CoFeMnSi Heusler alloy (2017)

Lakhan Bainsla, Resul Yilgin, Jun Okabayashi, Atsuo Ono, Kazuya Suzuki, and Shigemi Mizukami

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-09-06

Beschreibung: Author(s): Lakhan Bainsla, Resul Yilgin, Jun Okabayashi, Atsuo Ono, Kazuya Suzuki, and Shigemi Mizukami We report the structural and magnetic properties of CoFeMnSi equiatomic quaternary Heusler alloy thin films. The epitaxial growth of the single-crystalline films with full B 2 and partial L 2 1 ordering on the Cr-buffered MgO(001) substrate was achieved using the in situ postannealing at temperature ( T ... [Phys. Rev. B 96, 094404] Published Tue Sep 05, 2017

Schlagwort(e): Magnetism

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Excitation and tailoring of diffractive spin-wave beams in NiFe using nonuniform microwave antennas (2017)

H. S. Körner, J. Stigloher, and C. H. Back

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-09-06

Beschreibung: Author(s): H. S. Körner, J. Stigloher, and C. H. Back We experimentally demonstrate by time-resolved scanning magneto-optical Kerr microscopy the possibility to locally excite multiple spin-wave beams in the dipolar-dominated regime in metallic NiFe films. For this purpose we employ differently shaped nonuniform microwave antennas consisting of several... [Phys. Rev. B 96, 100401(R)] Published Tue Sep 05, 2017

Schlagwort(e): Magnetism

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Exact non-Markovian dynamics of qubits coupled to two interacting environments (2017)

H. Z. Shen, D. X. Li, Shi-Lei Su, Y. H. Zhou, and X. X. Yi

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-09-06

Beschreibung: Author(s): H. Z. Shen, D. X. Li, Shi-Lei Su, Y. H. Zhou, and X. X. Yi As the memory effect may be helpful in quantum information processing, non-Markovian dynamics plays an important role in the description of many-body open systems. Among these topics, the system consisting of independent qubits interacting with several coupled environments is of particular interest.... [Phys. Rev. A 96, 033805] Published Tue Sep 05, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Magnetic structure and magnetization of helical antiferromagnets in high magnetic fields perpendicular to the helix axis at zero temperature (2017)

David C. Johnston

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-09-06

Beschreibung: Author(s): David C. Johnston The zero-temperature angles of magnetic moments in a helix or sinusoidal fan confined to the x y plane, with respect to an in-plane magnetic field H x applied perpendicular to the z axis of a helix or fan, are calculated for commensurate helices and fans with field-independent turn angles k d between m... [Phys. Rev. B 96, 104405] Published Tue Sep 05, 2017

Schlagwort(e): Magnetism

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Inhomogeneous hard-core bosonic mixture with checkerboard supersolid phase: Quantum and thermal phase diagram (2017)

F. Heydarinasab and J. Abouie

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-09-06

Beschreibung: Author(s): F. Heydarinasab and J. Abouie We introduce an inhomogeneous bosonic mixture composed of two kinds of hard-core and semi-hard-core bosons with different nilpotency conditions and demonstrate that in contrast with the standard hard-core Bose-Hubbard model, our bosonic mixture with nearest- and next-nearest-neighbor interactions on... [Phys. Rev. B 96, 104406] Published Tue Sep 05, 2017

Schlagwort(e): Magnetism

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Continuous-variable entanglement generation using a hybrid $\mathcal{PT}$-symmetric system (2017)

Saeid Vashahri-Ghamsari, Bing He, and Min Xiao

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-09-06

Beschreibung: Author(s): Saeid Vashahri-Ghamsari, Bing He, and Min Xiao We study a system of two coupled waveguides respectively carrying optical damping and optical gain in addition to squeezing elements in one or both waveguides. Such a system is expected to generate highly entangled light fields in the two waveguides. Especially, if the light fields are strong enough... [Phys. Rev. A 96, 033806] Published Tue Sep 05, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Strong Linear Dichroism in Spin-Polarized Photoemission from Spin-Orbit-Coupled Surface States (2017)

H. Bentmann, H. Maaß, E. E. Krasovskii, T. R. F. Peixoto, C. Seibel, M. Leandersson, T. Balasubramanian, and F. Reinert

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-09-06

Beschreibung: Author(s): H. Bentmann, H. Maaß, E. E. Krasovskii, T. R. F. Peixoto, C. Seibel, M. Leandersson, T. Balasubramanian, and F. Reinert A comprehensive understanding of spin-polarized photoemission is crucial for accessing the electronic structure of spin-orbit coupled materials. Yet, the impact of the final state in the photoemission process on the photoelectron spin has been difficult to assess in these systems. We present experim... [Phys. Rev. Lett. 119, 106401] Published Tue Sep 05, 2017

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Spin dynamics of the magnetocaloric compound ${\mathrm{MnFe}}_{4}{\mathrm{Si}}_{3}$ (2017)

N. Biniskos, S. Raymond, K. Schmalzl, A. Schneidewind, J. Voigt, R. Georgii, P. Hering, J. Persson, K. Friese, and T. Brückel

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-09-07

Beschreibung: Author(s): N. Biniskos, S. Raymond, K. Schmalzl, A. Schneidewind, J. Voigt, R. Georgii, P. Hering, J. Persson, K. Friese, and T. Brückel The magnetic excitation spectrum of the magnetocaloric compound MnFe 4 Si 3 has been investigated by means of polarized and unpolarized inelastic neutron scattering on single crystals. Spectra were collected in the ferromagnetic phase ( T C ≈ 305 K ), as well as in the paramagnetic state, in order to underst... [Phys. Rev. B 96, 104407] Published Wed Sep 06, 2017

Schlagwort(e): Magnetism

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Negative Longitudinal Magnetoresistance from the Anomalous $N=0$ Landau Level in Topological Materials (2017)

B. A. Assaf, T. Phuphachong, E. Kampert, V. V. Volobuev, P. S. Mandal, J. Sánchez-Barriga, O. Rader, G. Bauer, G. Springholz, L. A. de Vaulchier, and Y. Guldner

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-09-09

Beschreibung: Author(s): B. A. Assaf, T. Phuphachong, E. Kampert, V. V. Volobuev, P. S. Mandal, J. Sánchez-Barriga, O. Rader, G. Bauer, G. Springholz, L. A. de Vaulchier, and Y. Guldner Analysis of the magnetoresistance of topological insulators indicates that the bulk of these materials is more topologically interesting than previously thought. [Phys. Rev. Lett. 119, 106602] Published Fri Sep 08, 2017

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Hydrogen Clathrate Structures in Rare Earth Hydrides at High Pressures: Possible Route to Room-Temperature Superconductivity (2017)

Feng Peng, Ying Sun, Chris J. Pickard, Richard J. Needs, Qiang Wu, and Yanming Ma

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-09-09

Beschreibung: Author(s): Feng Peng, Ying Sun, Chris J. Pickard, Richard J. Needs, Qiang Wu, and Yanming Ma A first-principles search among possible rare earth hydrogen clathrate structures under high pressure predicts that one of them, YH 10 , is a potential room-temperature superconductor with a T c of up to 303 K, at 400 GPa pressure. [Phys. Rev. Lett. 119, 107001] Published Fri Sep 08, 2017

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Spin Flips versus Spin Transport in Nonthermal Electrons Excited by Ultrashort Optical Pulses in Transition Metals (2017)

V. Shokeen, M. Sanchez Piaia, J.-Y. Bigot, T. Müller, P. Elliott, J. K. Dewhurst, S. Sharma, and E. K. U. Gross

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-09-09

Beschreibung: Author(s): V. Shokeen, M. Sanchez Piaia, J.-Y. Bigot, T. Müller, P. Elliott, J. K. Dewhurst, S. Sharma, and E. K. U. Gross A joint theoretical and experimental investigation is performed to understand the underlying physics of laser-induced demagnetization in Ni and Co films with varying thicknesses excited by 10 fs optical pulses. Experimentally, the dynamics of spins is studied by determining the time-dependent amplit... [Phys. Rev. Lett. 119, 107203] Published Fri Sep 08, 2017

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Theory of passively-mode-locked fiber lasers with phase-modulated square pulses (2017)

Andrey Komarov, Alexander Dmitriev, Konstantin Komarov, Dmitry Meshcheriakov, Georges Semaan, and François Sanchez

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-09-12

Beschreibung: Author(s): Andrey Komarov, Alexander Dmitriev, Konstantin Komarov, Dmitry Meshcheriakov, Georges Semaan, and François Sanchez We present results of the analysis of square pulses generated in passively-mode-locked lasers under dissipative-soliton-resonance conditions. The master equation used in this work takes into account the gain saturation, the quadratic frequency dispersion of the gain and the refractive index, and the... [Phys. Rev. A 96, 033820] Published Mon Sep 11, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Relaxation and decoherence of qubits encoded in collective states of engineered magnetic structures (2017)

Alexey M. Shakirov, Alexey N. Rubtsov, Alexander I. Lichtenstein, and Pedro Ribeiro

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-09-12

Beschreibung: Author(s): Alexey M. Shakirov, Alexey N. Rubtsov, Alexander I. Lichtenstein, and Pedro Ribeiro The quantum nature of a microscopic system can only be revealed when it is sufficiently decoupled from surroundings. Interactions with the environment induce relaxation and decoherence that turn the quantum state into a classical mixture. Here, we study the timescales of these processes for a qubit ... [Phys. Rev. B 96, 094410] Published Mon Sep 11, 2017

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Using rf voltage induced ferromagnetic resonance to study the spin-wave density of states and the Gilbert damping in perpendicularly magnetized disks (2017)

Thibaut Devolder

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-09-12

Beschreibung: Author(s): Thibaut Devolder We study how the shape of the spin-wave resonance lines in rf voltage induced FMR can be used to extract the spin-wave density of states and the Gilbert damping within the precessing layer in nanoscale magnetic tunnel junctions that possess perpendicular magnetic anisotropy. We work with a field app... [Phys. Rev. B 96, 104413] Published Mon Sep 11, 2017

Schlagwort(e): Magnetism

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Electronic structure and magnetic properties of magnetically dead layers in epitaxial $\mathrm{CoF}{\mathrm{e}}_{2}{\mathrm{O}}_{4}/\mathrm{A}{\mathrm{l}}_{2}{\mathrm{O}}_{3}/\mathrm{Si}(111)$ films studied by x-ray magnetic circular dichroism (2017)

Yuki K. Wakabayashi, Yosuke Nonaka, Yukiharu Takeda, Shoya Sakamoto, Keisuke Ikeda, Zhendong Chi, Goro Shibata, Arata Tanaka, Yuji Saitoh, Hiroshi Yamagami, Masaaki Tanaka, Atsushi Fujimori, and Ryosho Nakane

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-09-12

Beschreibung: Author(s): Yuki K. Wakabayashi, Yosuke Nonaka, Yukiharu Takeda, Shoya Sakamoto, Keisuke Ikeda, Zhendong Chi, Goro Shibata, Arata Tanaka, Yuji Saitoh, Hiroshi Yamagami, Masaaki Tanaka, Atsushi Fujimori, and Ryosho Nakane Epitaxial CoF e 2 O 4 / A l 2 O 3 bilayers are expected to be highly efficient spin injectors into Si owing to the spin filter effect of CoF e 2 O 4 . To exploit the full potential of this system, understanding the microscopic origin of magnetically dead layers at the CoF e 2 O 4 / A l 2 O 3 interface is necessary. In this ... [Phys. Rev. B 96, 104410] Published Mon Sep 11, 2017

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

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Thema: Physik

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Enhancement of the Upper Critical Field in Disordered Transition Metal Dichalcogenide Monolayers (2017)

Stefan Ilić, Julia S. Meyer, and Manuel Houzet

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2017-09-12

Beschreibung: Author(s): Stefan Ilić, Julia S. Meyer, and Manuel Houzet We calculate the effect of impurities on the superconducting phase diagram of transition metal dichalcogenide monolayers in the presence of an in-plane magnetic field. Because of strong intrinsic spin-orbit coupling, the upper critical field greatly surpasses the Pauli limit at low temperatures. We ... [Phys. Rev. Lett. 119, 117001] Published Mon Sep 11, 2017

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

Print ISSN: 0031-9007

Digitale ISSN: 1079-7114

Thema: Physik

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Intensity autocorrelation measurements of frequency combs in the terahertz range (2017)

Ileana-Cristina Benea-Chelmus, Markus Rösch, Giacomo Scalari, Mattias Beck, and Jérôme Faist

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-09-13

Beschreibung: Author(s): Ileana-Cristina Benea-Chelmus, Markus Rösch, Giacomo Scalari, Mattias Beck, and Jérôme Faist We report on direct measurements of the emission character of quantum cascade laser based frequency combs, using intensity autocorrelation. Our implementation is based on fast electro-optic sampling, with a detection spectral bandwidth matching the emission bandwidth of the comb laser, around 2.5 TH... [Phys. Rev. A 96, 033821] Published Tue Sep 12, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Thema: Physik

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In situ measurement of light polarization with ellipticity-induced nonlinear magneto-optical rotation (2017)

Derek F. Jackson Kimball, Jordan Dudley, Yan Li, and Dilan Patel

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-09-13

Beschreibung: Author(s): Derek F. Jackson Kimball, Jordan Dudley, Yan Li, and Dilan Patel A precise, accurate, and relatively straightforward in situ method to measure and control the ellipticity of light resonantly interacting with an atomic vapor is described. The technique can be used to minimize vector light shifts. The method involves measurement of ellipticity-induced resonances in... [Phys. Rev. A 96, 033823] Published Tue Sep 12, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Single atoms coupled to a near-concentric cavity (2017)

Chi Huan Nguyen, Adrian Nugraha Utama, Nick Lewty, Kadir Durak, Gleb Maslennikov, Stanislav Straupe, Matthias Steiner, and Christian Kurtsiefer

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-09-14

Beschreibung: Author(s): Chi Huan Nguyen, Adrian Nugraha Utama, Nick Lewty, Kadir Durak, Gleb Maslennikov, Stanislav Straupe, Matthias Steiner, and Christian Kurtsiefer Concentric cavities can lead to strong photon-atom coupling without a need for high finesse or small physical-cavity volume. In this proof-of-principle experiment we demonstrate coupling of single Rb atoms to an 11-mm-long near-concentric cavity with a finesse F = 138 ( 2 ) . Operating the cavity 1.7 ( 1 ) μ m ... [Phys. Rev. A 96, 031802(R)] Published Wed Sep 13, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Thema: Physik

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Anisotropic spin relaxation induced by surface spin-orbit effects (2017)

Chao Zhou, Fatih Kandaz, Yunjiao Cai, Chuan Qin, Mengwen Jia, Zhe Yuan, Yizheng Wu, and Yi Ji

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-09-14

Beschreibung: Author(s): Chao Zhou, Fatih Kandaz, Yunjiao Cai, Chuan Qin, Mengwen Jia, Zhe Yuan, Yizheng Wu, and Yi Ji It is a common perception that the transport of a spin current in polycrystalline metal is isotropic and independent of the polarization direction, even though spin current is a tensorlike quantity and its polarization direction is a key variable. We demonstrate surprising anisotropic spin relaxatio... [Phys. Rev. B 96, 094413] Published Wed Sep 13, 2017

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

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Thema: Physik

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Spontaneous symmetry breaking in a quadratically driven nonlinear photonic lattice (2017)

Vincenzo Savona

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-09-14

Beschreibung: Author(s): Vincenzo Savona We investigate the occurrence of a phase transition, characterized by the spontaneous breaking of a discrete symmetry, in a driven-dissipative Bose-Hubbard lattice in the presence of two-photon coherent driving. The driving term does not lift the original U ( 1 ) symmetry completely and a discrete Z 2 s... [Phys. Rev. A 96, 033826] Published Wed Sep 13, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Thema: Physik

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Bloch oscillations and resonant radiation of light propagating in arrays of nonlinear fibers with high-order dispersion (2017)

A. Yulin, R. Driben, and T. Meier

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-09-14

Beschreibung: Author(s): A. Yulin, R. Driben, and T. Meier Bloch oscillations of spatiotemporal light wave packets in arrays of nonlinear fibers with high-order dispersion are studied. The light wave experiences discrete spatial diffraction along the waveguide array coordinate together with continuous temporal dispersion including higher-order terms. When a... [Phys. Rev. A 96, 033827] Published Wed Sep 13, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Thema: Physik

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Magnetic order, hysteresis, and phase coexistence in magnetoelectric ${\mathrm{LiCoPO}}_{4}$ (2017)

Ellen Fogh, Rasmus Toft-Petersen, Eric Ressouche, Christof Niedermayer, Sonja Lindahl Holm, Maciej Bartkowiak, Oleksandr Prokhnenko, Steffen Sloth, Frederik Werner Isaksen, David Vaknin, and Niels Bech Christensen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-09-16

Beschreibung: Author(s): Ellen Fogh, Rasmus Toft-Petersen, Eric Ressouche, Christof Niedermayer, Sonja Lindahl Holm, Maciej Bartkowiak, Oleksandr Prokhnenko, Steffen Sloth, Frederik Werner Isaksen, David Vaknin, and Niels Bech Christensen Magnetoelectric materials are characterized by a coupling of electric and magnetic degrees of freedom, which can be brought about when magnetic ordering breaks inversion symmetry. This is the case in LiCoPO 4 , which displays one of the largest magnetoelectric effects among transition metal compounds. Using neutron diffraction in combination with state-of-the-art high-field magnet technology, the authors of this paper study the magnetic structures and phase diagram of LiCoPO 4 in fields up to 25.9 T. It is shown that the known magnetoelectric response is tied to commensurate magnetic order, while an incommensurate cycloid phase allows electric polarization along a direction yet to be probed experimentally. [Phys. Rev. B 96, 104420] Published Fri Sep 15, 2017

Schlagwort(e): Magnetism

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Effects of the antiferromagnetic spin structure on antiferromagnetically induced perpendicular magnetic anisotropy (2017)

Bo-Yao Wang, Ming-Shian Tsai, Chun-Wei Huang, Chun-Wei Shih, Chia-Ju Chen, Kai Lin, Jin-Jhuan Li, Nae-Yeou Jih, Chun-I Lu, Tzu-Hung Chuang, and Der-Hsin Wei

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-09-16

Beschreibung: Author(s): Bo-Yao Wang, Ming-Shian Tsai, Chun-Wei Huang, Chun-Wei Shih, Chia-Ju Chen, Kai Lin, Jin-Jhuan Li, Nae-Yeou Jih, Chun-I Lu, Tzu-Hung Chuang, and Der-Hsin Wei Antiferromagnetic (AFM) thin films are promising materials for inducing perpendicular magnetic anisotropy (PMA) in adjacent ferromagnetic (FM) films. This study demonstrates that in a selected AFM spin structure with out-of-plane uncompensated moments, the magnitude of the induced PMA in its neighbo... [Phys. Rev. B 96, 094416] Published Fri Sep 15, 2017

Schlagwort(e): Magnetism

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Thema: Physik

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Bunching effect and quantum statistics of partially indistinguishable photons (2017)

Fang-Wen Sun, Ao Shen, Yang Dong, Xiang-Dong Chen, and Guang-Can Guo

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2017-08-12

Beschreibung: Author(s): Fang-Wen Sun, Ao Shen, Yang Dong, Xiang-Dong Chen, and Guang-Can Guo The quantum statistics of particles is determined by both the spins and the indistinguishability of quantum states. Here we study the quantum statistics of partially distinguishable photons by defining the multiphoton indistinguishability. The photon-bunching coefficient is formulated based on the p... [Phys. Rev. A 96, 023823] Published Wed Aug 09, 2017

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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