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Ferromagnetic-nematic order and strongly correlated phases of fermions in optical flux lattices (2015)

Simon C. Davenport and Nigel R. Cooper

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Simon C. Davenport and Nigel R. Cooper We study a model of a two-dimensional ultracold atomic gas subjected to an “optical flux lattice”: a laser configuration where Raman-dressed atoms experience a strong artificial magnetic field. This leads to a band structure of narrow energy bands with nonzero Chern numbers. We consider the case of … [Phys. Rev. A 92, 023608] Published Mon Aug 10, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Enhanced stripe phases in spin-orbit-coupled Bose-Einstein condensates in ring cavities (2015)

Farokh Mivehvar and David L. Feder

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Farokh Mivehvar and David L. Feder The coupled dynamics of the atom and photon fields in optical ring cavities with two counterpropagating modes give rise to both spin-orbit interactions as well as long-ranged interactions between atoms of a many-body system. At zero temperature, the interplay between the two-body and cavity-mediated… [Phys. Rev. A 92, 023611] Published Mon Aug 10, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Triplet pair amplitude in a trapped s-wave superfluid Fermi gas with broken spin rotation symmetry (2015)

Yuki Endo, Daisuke Inotani, Ryo Hanai, and Yoji Ohashi

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Yuki Endo, Daisuke Inotani, Ryo Hanai, and Yoji Ohashi We investigate the possibility that the broken spatial inversion symmetry caused by a trap potential induces a spin-triplet Cooper pair amplitude in an s -wave superfluid Fermi gas. Based on symmetry considerations, we clarify that this phenomenon may occur, when a spin rotation symmetry of the syste… [Phys. Rev. A 92, 023610] Published Mon Aug 10, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Momentum-space Harper-Hofstadter model (2015)

Tomoki Ozawa, Hannah M. Price, and Iacopo Carusotto

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Tomoki Ozawa, Hannah M. Price, and Iacopo Carusotto We show how the weakly trapped Harper-Hofstadter model can be mapped onto a Harper-Hofstadter model in momentum space. In this momentum-space model, the band dispersion plays the role of the periodic potential, the Berry curvature plays the role of an effective magnetic field, the real-space harmoni… [Phys. Rev. A 92, 023609] Published Mon Aug 10, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Analytic Flow Equations for the Fermi Liquid Parameters of the Anderson Impurity Model (2015)

Vassilis Pandis and Alex C. Hewson

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Vassilis Pandis and Alex C. Hewson The low temperature behavior of a Fermi liquid can be described in terms of quasiparticle excitations that are in 1-1 correspondence with those of the noninteracting system. Because of adiabatic continuity, the Landau parameters, which describe the interactions between the quasiparticles, must evolv… [Phys. Rev. Lett. 115, 076401] Published Mon Aug 10, 2015

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Quantum Spin Liquid Emerging from Antiferromagnetic Order by Introducing Disorder (2015)

T. Furukawa, K. Miyagawa, T. Itou, M. Ito, H. Taniguchi, M. Saito, S. Iguchi, T. Sasaki, and K. Kanoda

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): T. Furukawa, K. Miyagawa, T. Itou, M. Ito, H. Taniguchi, M. Saito, S. Iguchi, T. Sasaki, and K. Kanoda Quantum spin liquids, which are spin versions of quantum matter, have been sought after in systems with geometrical frustration. We show that disorder drives a classical magnet into a quantum spin liquid through conducting NMR experiments on an organic Mott insulator, κ − ( ET ) 2 Cu [ N ( CN ) 2 ] Cl . Antiferrom… [Phys. Rev. Lett. 115, 077001] Published Tue Aug 11, 2015

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Three-component Fulde-Ferrell superfluids in a two-dimensional Fermi gas with spin-orbit coupling (2015)

Fang Qin (覃昉), Fan Wu, Wei Zhang, Wei Yi, and Guang-Can Guo

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Fang Qin (覃昉), Fan Wu, Wei Zhang, Wei Yi, and Guang-Can Guo We investigate the pairing physics of a three-component spin-orbit coupled Fermi gas in two spatial dimensions. The three atomic hyperfine states of the system are coupled by the recently realized synthetic spin-orbit coupling (SOC), which mixes different hyperfine states into helicity branches in a… [Phys. Rev. A 92, 023604] Published Tue Aug 04, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Reentrant behavior of the breathing-mode-oscillation frequency in a one-dimensional Bose gas (2015)

A. Iu. Gudyma, G. E. Astrakharchik, and Mikhail B. Zvonarev

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): A. Iu. Gudyma, G. E. Astrakharchik, and Mikhail B. Zvonarev Exciting temporal oscillations of the density distribution is a high-precision method for probing ultracold trapped atomic gases. Interaction effects in their many-body dynamics are particularly puzzling and counter-intuitive in one spatial dimension (1D) due to enhanced quantum correlations. We con… [Phys. Rev. A 92, 021601(R)] Published Fri Aug 07, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Hot-Electron Intraband Luminescence from Single Hot Spots in Noble-Metal Nanoparticle Films (2015)

Tobias Haug, Philippe Klemm, Sebastian Bange, and John M. Lupton

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Tobias Haug, Philippe Klemm, Sebastian Bange, and John M. Lupton Visible light emission from silver and gold nanoparticle films irradiated with ultrashort infrared pulses is governed by hot electron recombination within the conduction band. [Phys. Rev. Lett. 115, 067403] Published Fri Aug 07, 2015

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Tunneling Processes into Localized Subgap States in Superconductors (2015)

Michael Ruby, Falko Pientka, Yang Peng, Felix von Oppen, Benjamin W. Heinrich, and Katharina J. Franke

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): Michael Ruby, Falko Pientka, Yang Peng, Felix von Oppen, Benjamin W. Heinrich, and Katharina J. Franke We combine scanning-tunneling-spectroscopy experiments probing magnetic impurities on a superconducting surface with a theoretical analysis of the tunneling processes between (superconducting) tip and substrate. We show that the current through impurity-induced Shiba bound states is carried by singl… [Phys. Rev. Lett. 115, 087001] Published Thu Aug 20, 2015

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Layered Topological Crystalline Insulators (2015)

Youngkuk Kim, C. L. Kane, E. J. Mele, and Andrew M. Rappe

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): Youngkuk Kim, C. L. Kane, E. J. Mele, and Andrew M. Rappe Topological crystalline insulators (TCIs) are insulating materials whose topological property relies on generic crystalline symmetries. Based on first-principles calculations, we study a three-dimensional (3D) crystal constructed by stacking two-dimensional TCI layers. Depending on the interlayer in… [Phys. Rev. Lett. 115, 086802] Published Thu Aug 20, 2015

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Quantum Hall effect with small numbers of vortices in Bose-Einstein condensates (2015)

Tim Byrnes and Jonathan P. Dowling

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): Tim Byrnes and Jonathan P. Dowling When vortices are displaced in Bose-Einstein condensates (BECs), the Magnus force gives the system a momentum transverse in the direction to the displacement. We show that BECs in long channels with vortices exhibit a quantization of the current response with respect to the spatial vortex distributi… [Phys. Rev. A 92, 023629] Published Thu Aug 20, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Bose-Bose mixtures with synthetic spin-orbit coupling in optical lattices (2015)

Liang He, Anchun Ji, and Walter Hofstetter

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-25

Beschreibung: Author(s): Liang He, Anchun Ji, and Walter Hofstetter We investigate the ground-state properties of Bose-Bose mixtures with Rashba-type spin-orbit (SO) coupling in a square lattice. The system displays rich physics from the deep Mott insulator (MI) all the way to the superfluid (SF) regime. In the deep MI regime, exotic spin-ordered phases arise due to… [Phys. Rev. A 92, 023630] Published Mon Aug 24, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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X-ray Detection of Transient Magnetic Moments Induced by a Spin Current in Cu (2015)

R. Kukreja, S. Bonetti, Z. Chen, D. Backes, Y. Acremann, J. A. Katine, A. D. Kent, H. A. Dürr, H. Ohldag, and J. Stöhr

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-25

Beschreibung: Author(s): R. Kukreja, S. Bonetti, Z. Chen, D. Backes, Y. Acremann, J. A. Katine, A. D. Kent, H. A. Dürr, H. Ohldag, and J. Stöhr X-ray magnetic circular dichroism detects the transient magnetic moments that are induced in a nonmagnetic material by spin injection from a ferromagnet. [Phys. Rev. Lett. 115, 096601] Published Mon Aug 24, 2015

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Characterization of a simultaneous dual-species atom interferometer for a quantum test of the weak equivalence principle (2015)

A. Bonnin, N. Zahzam, Y. Bidel, and A. Bresson

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-19

Beschreibung: Author(s): A. Bonnin, N. Zahzam, Y. Bidel, and A. Bresson We present here the performance of a simultaneous dual-species matter-wave accelerometer for measuring the differential acceleration between two different atomic species ( Rb 87 and Rb 85 ). We study the expression and the extraction of the differential phase from the interferometer output. The differen… [Phys. Rev. A 92, 023626] Published Tue Aug 18, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Interacting multiple zero mode formulation and its application to a system consisting of a dark soliton in a condensate (2015)

J. Takahashi, Y. Nakamura, and Y. Yamanaka

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-19

Beschreibung: Author(s): J. Takahashi, Y. Nakamura, and Y. Yamanaka To formulate the zero modes in a finite-size system with spontaneous breakdown of symmetries in quantum field theory is not trivial, for in the naive Bogoliubov theory, one encounters difficulties such as phase diffusion, the absence of a definite criterion for determining the ground state, and infr… [Phys. Rev. A 92, 023627] Published Tue Aug 18, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Accessing Phonon Polaritons in Hyperbolic Crystals by Angle-Resolved Photoemission Spectroscopy (2015)

Andrea Tomadin, Alessandro Principi, Justin C. W. Song, Leonid S. Levitov, and Marco Polini

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): Andrea Tomadin, Alessandro Principi, Justin C. W. Song, Leonid S. Levitov, and Marco Polini Recently studied hyperbolic materials host unique phonon-polariton (PP) modes. The ultrashort wavelengths of these modes, as well as their low damping, hold promise for extreme subdiffraction nanophotonics schemes. Polar hyperbolic materials such as hexagonal boron nitride can be used to realize lon… [Phys. Rev. Lett. 115, 087401] Published Fri Aug 21, 2015

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Tracking Primary Thermalization Events in Graphene with Photoemission at Extreme Time Scales (2015)

I. Gierz, F. Calegari, S. Aeschlimann, M. Chávez Cervantes, C. Cacho, R. T. Chapman, E. Springate, S. Link, U. Starke, C. R. Ast, and A. Cavalleri

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): I. Gierz, F. Calegari, S. Aeschlimann, M. Chávez Cervantes, C. Cacho, R. T. Chapman, E. Springate, S. Link, U. Starke, C. R. Ast, and A. Cavalleri Ultrafast dynamics of photoexcited electron-hole pairs produced by subfemtosecond pulses in graphene may have implications for petahertz electronic and optoelectronic devices. [Phys. Rev. Lett. 115, 086803] Published Fri Aug 21, 2015

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Evidence for Half-Metallicity in n-type HgCr_{2} Se_{4} (2015)

Tong Guan, Chaojing Lin, Chongli Yang, Youguo Shi, Cong Ren, Yongqing Li, Hongming Weng, Xi Dai, Zhong Fang, Shishen Yan, and Peng Xiong

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): Tong Guan, Chaojing Lin, Chongli Yang, Youguo Shi, Cong Ren, Yongqing Li, Hongming Weng, Xi Dai, Zhong Fang, Shishen Yan, and Peng Xiong High quality HgCr 2 Se 4 single crystals have been investigated by magnetization, electron transport, and Andreev reflection spectroscopy. In the ferromagnetic ground state, the saturation magnetic moment of each unit cell corresponds to an integer number of electron spins ( 3 μ B / Cr 3 + ), and the Hall ef… [Phys. Rev. Lett. 115, 087002] Published Fri Aug 21, 2015

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Decoherence of Near-Surface Nitrogen-Vacancy Centers Due to Electric Field Noise (2015)

M. Kim, H. J. Mamin, M. H. Sherwood, K. Ohno, D. D. Awschalom, and D. Rugar

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): M. Kim, H. J. Mamin, M. H. Sherwood, K. Ohno, D. D. Awschalom, and D. Rugar We show that electric field noise from surface charge fluctuations can be a significant source of spin decoherence for near-surface nitrogen-vacancy (NV) centers in diamond. This conclusion is based on the increase in spin coherence observed when the diamond surface is covered with high-dielectric-c… [Phys. Rev. Lett. 115, 087602] Published Fri Aug 21, 2015

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Bayesian inference to characterize Josephson oscillations in a double-well trap (2015)

Juha Javanainen and Renuka Rajapakse

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): Juha Javanainen and Renuka Rajapakse We use quantum trajectories to simulate Josephson oscillations of atomic condensates between the two sides of a double-well potential. In the simulations the atoms in both wells are monitored using off-resonant light scattering, and the ultimate outcome of our thought experiment is a sequence of pho… [Phys. Rev. A 92, 023613] Published Tue Aug 11, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Disordered cold atoms in different symmetry classes (2015)

Fernanda Pinheiro and Jonas Larson

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): Fernanda Pinheiro and Jonas Larson We consider an experimentally realizable model of noninteracting but randomly coupled atoms in a two-dimensional optical lattice. By choosing appropriate real or complex-valued random fields and species-dependent energy offsets, this system can be used to analyze effects of disorder in four differen… [Phys. Rev. A 92, 023612] Published Tue Aug 11, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Cluster Gutzwiller study of the Bose-Hubbard ladder: Ground-state phase diagram and many-body Landau-Zener dynamics (2015)

Haiming Deng (邓海明), Hui Dai (代慧), Jiahao Huang (黄嘉豪), Xizhou Qin (秦锡洲), Jun Xu (徐军), Honghua Zhong (钟宏华), Chunshan He (何春山), and Chaohong Lee (李朝红)

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Haiming Deng (邓海明), Hui Dai (代慧), Jiahao Huang (黄嘉豪), Xizhou Qin (秦锡洲), Jun Xu (徐军), Honghua Zhong (钟宏华), Chunshan He (何春山), and Chaohong Lee (李朝红) We present a cluster Gutzwiller mean-field study for ground states and time-evolution dynamics in the Bose-Hubbard ladder (BHL), which can be realized by loading Bose atoms in double-well optical lattices. In our cluster mean-field approach, we treat each double-well unit of two lattice sites as a c… [Phys. Rev. A 92, 023618] Published Thu Aug 13, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Molecular rotations in matter-wave interferometry (2015)

Benjamin A. Stickler and Klaus Hornberger

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Benjamin A. Stickler and Klaus Hornberger We extend the theory of matter-wave interferometry of pointlike particles to nonspherical objects by taking the orientational degrees of freedom into account. In particular, we derive the grating transformation operator, which maps the impinging state onto the outgoing state, for a general, orientat… [Phys. Rev. A 92, 023619] Published Thu Aug 13, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Efficient Cluster Algorithm for Spin Glasses in Any Space Dimension (2015)

Zheng Zhu, Andrew J. Ochoa, and Helmut G. Katzgraber

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Zheng Zhu, Andrew J. Ochoa, and Helmut G. Katzgraber Spin systems with frustration and disorder are notoriously difficult to study, both analytically and numerically. While the simulation of ferromagnetic statistical mechanical models benefits greatly from cluster algorithms, these accelerated dynamics methods remain elusive for generic spin-glass-lik… [Phys. Rev. Lett. 115, 077201] Published Fri Aug 14, 2015

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

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Numerical Evidence of Quantum Melting of Spin Ice: Quantum-to-Classical Crossover (2015)

Yasuyuki Kato and Shigeki Onoda

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Yasuyuki Kato and Shigeki Onoda Unbiased quantum Monte Carlo simulations are performed on the nearest-neighbor spin- 1 2 pyrochlore X X Z model with an antiferromagnetic longitudinal and the weak ferromagnetic transverse exchange couplings, J and J ⊥ . The specific heat exhibits a broad peak at T CSI ∼ 0.2 J associated with a crossover to a… [Phys. Rev. Lett. 115, 077202] Published Fri Aug 14, 2015

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

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Collective Modes and Structural Modulation in Ni-Mn-Ga(Co) Martensite Thin Films Probed by Femtosecond Spectroscopy and Scanning Tunneling Microscopy (2015)

M. Schubert, H. Schaefer, J. Mayer, A. Laptev, M. Hettich, M. Merklein, C. He, C. Rummel, O. Ristow, M. Großmann, Y. Luo, V. Gusev, K. Samwer, M. Fonin, T. Dekorsy, and J. Demsar

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): M. Schubert, H. Schaefer, J. Mayer, A. Laptev, M. Hettich, M. Merklein, C. He, C. Rummel, O. Ristow, M. Großmann, Y. Luo, V. Gusev, K. Samwer, M. Fonin, T. Dekorsy, and J. Demsar The origin of the martensitic transition in the magnetic shape memory alloy Ni-Mn-Ga has been widely discussed. While several studies suggest it is electronically driven, the adaptive martensite model reproduced the peculiar nonharmonic lattice modulation. We used femtosecond spectroscopy to probe t… [Phys. Rev. Lett. 115, 076402] Published Thu Aug 13, 2015

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

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Reconfigurable Quantum-Dot Molecules Created by Atom Manipulation (2015)

Yi Pan, Jianshu Yang, Steven C. Erwin, Kiyoshi Kanisawa, and Stefan Fölsch

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Yi Pan, Jianshu Yang, Steven C. Erwin, Kiyoshi Kanisawa, and Stefan Fölsch Quantum-dot molecules were constructed on a semiconductor surface using atom manipulation by scanning tunneling microscopy (STM) at 5 K. The molecules consist of several coupled quantum dots, each of which comprises a chain of charged adatoms that electrostatically confines intrinsic surface-state e… [Phys. Rev. Lett. 115, 076803] Published Fri Aug 14, 2015

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Interaction of Strain and Nuclear Spins in Silicon: Quadrupolar Effects on Ionized Donors (2015)

David P. Franke, Florian M. Hrubesch, Markus Künzl, Hans-Werner Becker, Kohei M. Itoh, Martin Stutzmann, Felix Hoehne, Lukas Dreher, and Martin S. Brandt

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-07-30

Beschreibung: Author(s): David P. Franke, Florian M. Hrubesch, Markus Künzl, Hans-Werner Becker, Kohei M. Itoh, Martin Stutzmann, Felix Hoehne, Lukas Dreher, and Martin S. Brandt The interaction between the nuclear quadrupole moment of Arsenic and an electric field gradient can be manipulated by applying an elastic strain to the host silicon crystal. This technique could allow for mechanical tuning of qubits. [Phys. Rev. Lett. 115, 057601] Published Wed Jul 29, 2015

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

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Twist-and-turn spin squeezing in Bose-Einstein condensates (2015)

W. Muessel, H. Strobel, D. Linnemann, T. Zibold, B. Juliá-Díaz, and M. K. Oberthaler

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): W. Muessel, H. Strobel, D. Linnemann, T. Zibold, B. Juliá-Díaz, and M. K. Oberthaler We demonstrate experimentally an alternative method for the dynamic generation of atomic spin squeezing, building on the interplay between linear coupling and nonlinear phase evolution. Since the resulting quantum dynamics can be seen as rotation and shear on the generalized Bloch sphere, we call th… [Phys. Rev. A 92, 023603] Published Mon Aug 03, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Four-boson bound states from a functional renormalization group (2015)

Benjamín Jaramillo Ávila and Michael C. Birse

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Benjamín Jaramillo Ávila and Michael C. Birse We use the functional renormalization group to study the spectrum of three- and four-body states in bosonic systems around the unitary limit. Our effective action includes all energy-independent contact interactions in the four-atom sector, and we introduce a running trimer field to eliminate coupli… [Phys. Rev. A 92, 023601] Published Mon Aug 03, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Large Superconducting Spin Valve Effect and Ultrasmall Exchange Splitting in Epitaxial Rare-Earth-Niobium Trilayers (2015)

Yuanzhou Gu, Gábor B. Halász, J. W. A. Robinson, and M. G. Blamire

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Yuanzhou Gu, Gábor B. Halász, J. W. A. Robinson, and M. G. Blamire Epitaxial Ho / Nb / Ho and Dy / Nb / Dy superconducting spin valves show a reversible change in the zero-field critical temperature ( Δ T c 0 ) of ∼ 400 mK and an infinite magnetoresistance on changing the relative magnetization of the Ho or Dy layers. Unlike transition-metal superconducting spin valves, which s… [Phys. Rev. Lett. 115, 067201] Published Mon Aug 03, 2015

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Surface and Step Conductivities on Si(111) Surfaces (2015)

Sven Just, Marcus Blab, Stefan Korte, Vasily Cherepanov, Helmut Soltner, and Bert Voigtländer

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): Sven Just, Marcus Blab, Stefan Korte, Vasily Cherepanov, Helmut Soltner, and Bert Voigtländer Four-point measurements using a multitip scanning tunneling microscope are carried out in order to determine surface and step conductivities on Si(111) surfaces. In a first step, distance-dependent four-point measurements in the linear configuration are used in combination with an analytical three-l… [Phys. Rev. Lett. 115, 066801] Published Mon Aug 03, 2015

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Linear Scaling of the Exciton Binding Energy versus the Band Gap of Two-Dimensional Materials (2015)

Jin-Ho Choi, Ping Cui, Haiping Lan, and Zhenyu Zhang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Jin-Ho Choi, Ping Cui, Haiping Lan, and Zhenyu Zhang The exciton is one of the most crucial physical entities in the performance of optoelectronic and photonic devices, and widely varying exciton binding energies have been reported in different classes of materials. Using first-principles calculations within the G W –Bethe-Salpeter equation approach, he… [Phys. Rev. Lett. 115, 066403] Published Fri Aug 07, 2015

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

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Strain Induced Vortex Core Switching in Planar Magnetostrictive Nanostructures (2015)

T. A. Ostler, R. Cuadrado, R. W. Chantrell, A. W. Rushforth, and S. A. Cavill

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): T. A. Ostler, R. Cuadrado, R. W. Chantrell, A. W. Rushforth, and S. A. Cavill The dynamics of magnetic vortex cores is of great interest because the gyrotropic mode has applications in spin torque driven magnetic microwave oscillators, and also provides a means to flip the direction of the core for use in magnetic storage devices. Here, we propose a new means of stimulating m… [Phys. Rev. Lett. 115, 067202] Published Fri Aug 07, 2015

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Line Degeneracy and Strong Spin-Orbit Coupling of Light with Bulk Bianisotropic Metamaterials (2015)

Qinghua Guo, Wenlong Gao, Jing Chen, Yongmin Liu, and Shuang Zhang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Qinghua Guo, Wenlong Gao, Jing Chen, Yongmin Liu, and Shuang Zhang Propagation of light in a medium is dictated by equifrequency surfaces (EFSs), which play a similar role as Fermi surfaces for electrons in crystals. Engineering the equifrequency surface of light through structuring a photonic medium enables superior control over light propagation that goes beyond … [Phys. Rev. Lett. 115, 067402] Published Fri Aug 07, 2015

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Controlling disorder with periodically modulated interactions (2015)

Arkadiusz Kosior, Jan Major, Marcin Płodzień, and Jakub Zakrzewski

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Arkadiusz Kosior, Jan Major, Marcin Płodzień, and Jakub Zakrzewski We investigate the celebrated problem of the one-dimensional tight-binding model in the presence of disorder leading to Anderson localization from a novel perspective. A binary disorder is assumed to be created by immobile, heavy particles that affect the motion of the lighter, mobile species in the… [Phys. Rev. A 92, 023606] Published Fri Aug 07, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Tunable Spin-Qubit Coupling Mediated by a Multielectron Quantum Dot (2015)

V. Srinivasa, H. Xu, and J. M. Taylor

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): V. Srinivasa, H. Xu, and J. M. Taylor We present an approach for entangling electron spin qubits localized on spatially separated impurity atoms or quantum dots via a multielectron, two-level quantum dot. The effective exchange interaction mediated by the dot can be understood as the simplest manifestation of Ruderman-Kittel-Kasuya-Yosi... [Phys. Rev. Lett. 114, 226803] Published Thu Jun 04, 2015

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Finding zeros of the Riemann zeta function by periodic driving of cold atoms (2015)

C. E. Creffield and G. Sierra

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-06-09

Beschreibung: Author(s): C. E. Creffield and G. Sierra The Riemann hypothesis, which states that the nontrivial zeros of the Riemann zeta function all lie on a certain line in the complex plane, is one of the most important unresolved problems in mathematics. We propose here an approach to finding a physical system to study the Riemann zeros, which is b... [Phys. Rev. A 91, 063608] Published Mon Jun 08, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Magnetism in the three-dimensional layered Lieb lattice: Enhanced transition temperature via flat-band and Van Hove singularities (2015)

Kazuto Noda, Kensuke Inaba, and Makoto Yamashita

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-06-09

Beschreibung: Author(s): Kazuto Noda, Kensuke Inaba, and Makoto Yamashita We describe the enhanced magnetic transition temperatures Tc of two-component fermions in three-dimensional layered Lieb lattices, which are created in cold-atom experiments. We determine the phase diagram at half filling using the dynamical mean-field theory. The dominant mechanism of enhanced Tc g... [Phys. Rev. A 91, 063610] Published Mon Jun 08, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Large effective three-body interaction in a double-well optical lattice (2015)

Saurabh Paul and Eite Tiesinga

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Saurabh Paul and Eite Tiesinga We study ultracold atoms in an optical lattice with two local minima per unit cell and show that the low-energy states of a multiband Bose-Hubbard (BH) Hamiltonian with only pairwise interactions are equivalent to an effective single-band Hamiltonian with strong three-body interactions. We focus on … [Phys. Rev. A 92, 023602] Published Mon Aug 03, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Sub- and supercritical defect scattering in Schrödinger chains with higher-order hopping (2015)

J. Stockhofe and P. Schmelcher

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): J. Stockhofe and P. Schmelcher We theoretically analyze a discrete Schrödinger chain with hopping to the first and second neighbors, as can be realized with zigzag arrangements of optical waveguides or lattice sites for cold atoms. Already at moderate values, second-neighbor hopping has a strong impact on the band structure, lead… [Phys. Rev. A 92, 023605] Published Fri Aug 07, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

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Drag dynamics in one-dimensional Fermi systems (2015)

Jun'ichi Ozaki, Masaki Tezuka, and Norio Kawakami

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Jun'ichi Ozaki, Masaki Tezuka, and Norio Kawakami We study drag dynamics of several fermions in a fermion cloud in one-dimensional continuous systems, with particular emphasis on the nontrivial quantum many-body effects in systems whose parameters change gradually in real time. We adopt the Fermi-Hubbard model and the time-dependent density-matrix … [Phys. Rev. A 92, 023607] Published Fri Aug 07, 2015

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Quantum fluctuations in the BCS-BEC crossover of two-dimensional Fermi gases (2015)

Lianyi He, Haifeng Lü, Gaoqing Cao, Hui Hu, and Xia-Ji Liu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Lianyi He, Haifeng Lü, Gaoqing Cao, Hui Hu, and Xia-Ji Liu We present a theoretical study of the ground state of the BCS-BEC crossover in dilute two-dimensional Fermi gases. While the mean-field theory provides a simple and analytical equation of state, the pressure is equal to that of a noninteracting Fermi gas in the entire BCS-BEC crossover, which is not… [Phys. Rev. A 92, 023620] Published Fri Aug 14, 2015

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Real-time dynamics of an impurity in an ideal Bose gas in a trap (2015)

A. G. Volosniev, H.-W. Hammer, and N. T. Zinner

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): A. G. Volosniev, H.-W. Hammer, and N. T. Zinner We investigate the behavior of a harmonically trapped system consisting of an impurity in a dilute ideal Bose gas after the boson-impurity interaction is suddenly switched on. As a theoretical framework, we use a field-theory approach in the space-time domain within the T -matrix approximation. We es… [Phys. Rev. A 92, 023623] Published Fri Aug 14, 2015

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Helical Spin Order from Topological Dirac and Weyl Semimetals (2015)

Xiao-Qi Sun, Shou-Cheng Zhang, and Zhong Wang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Xiao-Qi Sun, Shou-Cheng Zhang, and Zhong Wang We study dynamical mass generation and the resultant helical spin orders in topological Dirac and Weyl semimetals, including the edge states of quantum spin Hall insulators, the surface states of weak topological insulators, and the bulk materials of Weyl semimetals. In particular, the helical spin … [Phys. Rev. Lett. 115, 076802] Published Thu Aug 13, 2015

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Origin of the Anomalous Mass Renormalization in Metallic Quantum Well States of Strongly Correlated Oxide SrVO_{3} (2015)

Masaki Kobayashi, Kohei Yoshimatsu, Enju Sakai, Miho Kitamura, Koji Horiba, Atsushi Fujimori, and Hiroshi Kumigashira

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Masaki Kobayashi, Kohei Yoshimatsu, Enju Sakai, Miho Kitamura, Koji Horiba, Atsushi Fujimori, and Hiroshi Kumigashira In situ angle-resolved photoemission spectroscopy (ARPES) has been performed on SrVO 3 ultrathin films, which show metallic quantum well (QW) states, to unveil the origin of the anomalous mass enhancement in the QW subbands. The line-shape analysis of the ARPES spectra reveals that the strength of th… [Phys. Rev. Lett. 115, 076801] Published Thu Aug 13, 2015

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Anderson Localization and the Quantum Phase Diagram of Three Dimensional Disordered Dirac Semimetals (2015)

J. H. Pixley, Pallab Goswami, and S. Das Sarma

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): J. H. Pixley, Pallab Goswami, and S. Das Sarma We study the quantum phase diagram of a three dimensional noninteracting Dirac semimetal in the presence of either quenched axial or scalar potential disorder, by calculating the average and the typical density of states as well as the inverse participation ratio using numerically exact methods. We … [Phys. Rev. Lett. 115, 076601] Published Tue Aug 11, 2015

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Coherent zero-field magnetization resonance in a dipolar spin-1 Bose-Einstein condensate (2015)

Wenxian Zhang, S. Yi, M. S. Chapman, and J. Q. You

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-13

Beschreibung: Author(s): Wenxian Zhang, S. Yi, M. S. Chapman, and J. Q. You With current magnetic-field shielding and high-precision detection in dipolar spinor Bose-Einstein condensates, it is possible to experimentally detect the low- or zero-field nonsecular dipolar dynamics. Here we analytically investigate the zero-field nonsecular magnetic dipolar interaction effect, … [Phys. Rev. A 92, 023615] Published Wed Aug 12, 2015

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Density-functional theory for the crystalline phases of a two-dimensional dipolar Fermi gas (2015)

B. P. van Zyl, W. Kirkby, and W. Ferguson

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-13

Beschreibung: Author(s): B. P. van Zyl, W. Kirkby, and W. Ferguson Density-functional theory is utilized to investigate the zero-temperature transition from a Fermi liquid to an inhomogeneous stripe, or Wigner crystal phase, predicted to occur in a one-component, spin-polarized, two-dimensional dipolar Fermi gas. Correlations are treated semiexactly within the loca… [Phys. Rev. A 92, 023614] Published Wed Aug 12, 2015

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Analytic models for the density of a ground-state spinor condensate (2015)

Sandeep Gautam and S. K. Adhikari

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-13

Beschreibung: Author(s): Sandeep Gautam and S. K. Adhikari We demonstrate that the ground state of a trapped spin-1 and spin-2 spinor ferromagnetic Bose-Einstein condensate (BEC) can be well approximated by a single decoupled Gross-Pitaevskii (GP) equation. Useful analytic models for the ground-state densities of ferromagnetic BECs are obtained from the Tho… [Phys. Rev. A 92, 023616] Published Wed Aug 12, 2015

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Controlled pairing symmetry of the superfluid state in systems of three-component repulsive fermionic atoms in optical lattices (2015)

Sei-ichiro Suga

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-13

Beschreibung: Author(s): Sei-ichiro Suga We investigate the pairing symmetry of the superfluid state in repulsively interacting three-component (color) fermionic atoms in optical lattices. When two of the three color-dependent repulsions are much stronger than the other, pairing symmetry is an extended s wave, although the superfluid state… [Phys. Rev. A 92, 023617] Published Wed Aug 12, 2015

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Generation and storage of spin-nematic squeezing in a spinor Bose-Einstein condensate (2015)

Yixiao Huang, Heng-Na Xiong, Zhe Sun, and Xiaoguang Wang

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Yixiao Huang, Heng-Na Xiong, Zhe Sun, and Xiaoguang Wang We propose a scheme to store the spin-nematic squeezing in a spinor Bose-Einstein condensate by applying periodic microwave pulses. For a proper pulse period and phase shift, the squeezing can be enhanced and maintained for a long time, which realizes the storage of the maximal squeezing. We also pr… [Phys. Rev. A 92, 023622] Published Fri Aug 14, 2015

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Majorana fermions in quasi-one-dimensional and higher-dimensional ultracold optical lattices (2015)

Chunlei Qu, Ming Gong, Yong Xu, Sumanta Tewari, and Chuanwei Zhang

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Chunlei Qu, Ming Gong, Yong Xu, Sumanta Tewari, and Chuanwei Zhang We study Majorana fermions (MFs) in quasi-one dimensional (quasi-1D) and higher-dimensional fermionic optical lattices with a strictly 1D spin-orbit coupling, which has already been realized in cold atom experiments. We show that when the superfluid order parameters are homogeneous and are enforced … [Phys. Rev. A 92, 023621] Published Fri Aug 14, 2015

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Spin Hall Effects Due to Phonon Skew Scattering (2015)

Cosimo Gorini, Ulrich Eckern, and Roberto Raimondi

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Cosimo Gorini, Ulrich Eckern, and Roberto Raimondi A diversity of spin Hall effects in metallic systems is known to rely on Mott skew scattering. In this work its high-temperature counterpart, phonon skew scattering, which is expected to be of foremost experimental relevance, is investigated. In particular, the phonon skew scattering spin Hall condu… [Phys. Rev. Lett. 115, 076602] Published Fri Aug 14, 2015

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Candidate Source of Flux Noise in SQUIDs: Adsorbed Oxygen Molecules (2015)

Hui Wang, Chuntai Shi, Jun Hu, Sungho Han, Clare C. Yu, and R. Q. Wu

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Hui Wang, Chuntai Shi, Jun Hu, Sungho Han, Clare C. Yu, and R. Q. Wu A major obstacle to using superconducting quantum interference devices (SQUIDs) as qubits is flux noise. We propose that the heretofore mysterious spins producing flux noise could be O 2 molecules adsorbed on the surface. Using density functional theory calculations, we find that an O 2 molecule adsor… [Phys. Rev. Lett. 115, 077002] Published Fri Aug 14, 2015

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Controlled Strong Coupling and Absence of Dark Polaritons in Microcavities with Double Quantum Wells (2015)

K. Sivalertporn and E. A. Muljarov

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): K. Sivalertporn and E. A. Muljarov We demonstrate an efficient switching between strong and weak exciton-photon coupling regimes in microcavity-embedded asymmetric double quantum wells, controlled by an applied electric field. We show that a fine-tuning of the electric field leads to drastic changes in the polariton properties, with … [Phys. Rev. Lett. 115, 077401] Published Fri Aug 14, 2015

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Gigantic Surface Lifetime of an Intrinsic Topological Insulator (2015)

Madhab Neupane, Su-Yang Xu, Yukiaki Ishida, Shuang Jia, Benjamin M. Fregoso, Chang Liu, Ilya Belopolski, Guang Bian, Nasser Alidoust, Tomasz Durakiewicz, Victor Galitski, Shik Shin, Robert J. Cava, and M. Zahid Hasan

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-10

Beschreibung: Author(s): Madhab Neupane, Su-Yang Xu, Yukiaki Ishida, Shuang Jia, Benjamin M. Fregoso, Chang Liu, Ilya Belopolski, Guang Bian, Nasser Alidoust, Tomasz Durakiewicz, Victor Galitski, Shik Shin, Robert J. Cava, and M. Zahid Hasan Exceptionally long-lived excited surface states are found in the topological insulator Bi 2 Te 2 Se, with the state persisting for microseconds. [Phys. Rev. Lett. 115, 116801] Published Wed Sep 09, 2015

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Antiferroquadrupolar and Ising-Nematic Orders of a Frustrated Bilinear-Biquadratic Heisenberg Model and Implications for the Magnetism of FeSe (2015)

Rong Yu and Qimiao Si

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-10

Beschreibung: Author(s): Rong Yu and Qimiao Si Motivated by the properties of the iron chalcogenides, we study the phase diagram of a generalized Heisenberg model with frustrated bilinear-biquadratic interactions on a square lattice. We identify zero-temperature phases with antiferroquadrupolar and Ising-nematic orders. The effects of quantum fl… [Phys. Rev. Lett. 115, 116401] Published Tue Sep 08, 2015

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Superconducting Fluctuations in the Normal State of the Two-Dimensional Hubbard Model (2015)

Xi Chen, J. P. F. Le; Blanc, and Emanuel Gull

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-10

Beschreibung: Author(s): Xi Chen, J. P. F. LeBlanc, and Emanuel Gull We compute the two-particle quantities relevant for superconducting correlations in the two-dimensional Hubbard model within the dynamical cluster approximation. In the normal state we identify the parameter regime in density, interaction, and second-nearest-neighbor hopping strength that maximizes … [Phys. Rev. Lett. 115, 116402] Published Wed Sep 09, 2015

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Demagnetization dynamics of noninteracting trapped fermions (2015)

Andrew P. Koller, Joshua Mundinger, Michael L. Wall, and Ana Maria Rey

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-09-11

Beschreibung: Author(s): Andrew P. Koller, Joshua Mundinger, Michael L. Wall, and Ana Maria Rey Motional effects on the demagnetization of trapped, noninteracting fermions are investigated, with dephasing time scales found to be faster than those observed in ultracold experiments for interacting cases; counterintuitively, spin-echo pulses — a technique widely used to regain magnetization — are found here to instead deteriorate the situation. [Phys. Rev. A 92, 033608] Published Thu Sep 10, 2015

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Relaxation dynamics of ultracold bosons in a double-well potential: Thermalization and prethermalization in a nearly integrable model (2015)

Jayson G. Cosme

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-09-11

Beschreibung: Author(s): Jayson G. Cosme We numerically investigate the relaxation dynamics in an isolated quantum system of interacting bosons trapped in a double-well potential after an integrability breaking quench. Using the statistics of the spectrum, we identify the postquench Hamiltonian as nonchaotic and close to integrability over… [Phys. Rev. A 92, 033607] Published Thu Sep 10, 2015

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Bosonic Integer Quantum Hall Effect in Optical Flux Lattices (2015)

A. Sterdyniak, Nigel R. Cooper, and N. Regnault

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-11

Beschreibung: Author(s): A. Sterdyniak, Nigel R. Cooper, and N. Regnault In two dimensions strongly interacting bosons in a magnetic field can realize a bosonic integer quantum Hall state, the simplest two-dimensional example of a symmetry-protected topological phase. We propose a realistic implementation of this phase using an optical flux lattice. Through exact diagona… [Phys. Rev. Lett. 115, 116802] Published Thu Sep 10, 2015

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Magnetoanisotropic Andreev Reflection in Ferromagnet-Superconductor Junctions (2015)

Petra Högl, Alex Matos-Abiague, Igor Žutić, and Jaroslav Fabian

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-11

Beschreibung: Author(s): Petra Högl, Alex Matos-Abiague, Igor Žutić, and Jaroslav Fabian Andreev reflection spectroscopy of ferromagnet-supercondutor (FS) junctions is an important probe of spin polarization. We theoretically investigate spin-polarized transport in FS junctions in the presence of Rashba and Dresselhaus interfacial spin-orbit fields and show that Andreev reflection can b… [Phys. Rev. Lett. 115, 116601] Published Thu Sep 10, 2015

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Bosonic Integer Quantum Hall Effect in an Interacting Lattice Model (2015)

Yin-Chen He, Subhro Bhattacharjee, R. Moessner, and Frank Pollmann

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-11

Beschreibung: Author(s): Yin-Chen He, Subhro Bhattacharjee, R. Moessner, and Frank Pollmann We study a bosonic model with correlated hopping on a honeycomb lattice, and show that its ground state is a bosonic integer quantum Hall (BIQH) phase, a prominent example of a symmetry-protected topological (SPT) phase. By using the infinite density matrix renormalization group method, we establish… [Phys. Rev. Lett. 115, 116803] Published Thu Sep 10, 2015

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Semiconductor-Nanowire-Based Superconducting Qubit (2015)

T. W. Larsen, K. D. Petersson, F. Kuemmeth, T. S. Jespersen, P. Krogstrup, J. Nygård, and C. M. Marcus

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-15

Beschreibung: Author(s): T. W. Larsen, K. D. Petersson, F. Kuemmeth, T. S. Jespersen, P. Krogstrup, J. Nygård, and C. M. Marcus A qubit made of a semiconducting nanowire sandwiched between two superconductors could simplify the design of quantum information processing architectures. [Phys. Rev. Lett. 115, 127001] Published Mon Sep 14, 2015

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Impurity in a Bose-Einstein condensate: Study of the attractive and repulsive branch using quantum Monte Carlo methods (2015)

L. A. Peña Ardila and S. Giorgini

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-09-16

Beschreibung: Author(s): L. A. Peña Ardila and S. Giorgini We investigate the properties of an impurity immersed in a dilute Bose gas at zero temperature using quantum Monte Carlo methods. The interactions between bosons are modeled by a hard-sphere potential with scattering length a , whereas the interactions between the impurity and the bosons are modeled … [Phys. Rev. A 92, 033612] Published Tue Sep 15, 2015

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Melting of Three-Sublattice Order in Easy-Axis Antiferromagnets on Triangular and Kagome Lattices (2015)

Kedar Damle

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-17

Beschreibung: Author(s): Kedar Damle When the constituent spins have an energetic preference to lie along an easy axis, triangular and kagome lattice antiferromagnets often develop long-range order that distinguishes the three sublattices of the underlying triangular Bravais lattice. In zero magnetic field, this three-sublattice order … [Phys. Rev. Lett. 115, 127204] Published Wed Sep 16, 2015

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Electrical Tuning of Exciton Binding Energies in Monolayer WS_{2} (2015)

Alexey Chernikov, Arend M. van der Zande, Heather M. Hill, Albert F. Rigosi, Ajanth Velauthapillai, James Hone, and Tony F. Heinz

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-17

Beschreibung: Author(s): Alexey Chernikov, Arend M. van der Zande, Heather M. Hill, Albert F. Rigosi, Ajanth Velauthapillai, James Hone, and Tony F. Heinz An externally applied voltage in a transistor device can continuously tune the binding energy of excitons in monolayer WS 2 . [Phys. Rev. Lett. 115, 126802] Published Wed Sep 16, 2015

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Optical Diode Effect at Spin-Wave Excitations of the Room-Temperature Multiferroic BiFeO_{3} (2015)

I. Kézsmárki, U. Nagel, S. Bordács, R. S. Fishman, J. H. Lee, Hee Taek Yi, S.-W. Cheong, and T. Rõõm

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-17

Beschreibung: Author(s): I. Kézsmárki, U. Nagel, S. Bordács, R. S. Fishman, J. H. Lee, Hee Taek Yi, S.-W. Cheong, and T. Rõõm Multiferroics permit the magnetic control of the electric polarization and the electric control of the magnetization. These static magnetoelectric (ME) effects are of enormous interest: The ability to read and write a magnetic state current-free by an electric voltage would provide a huge technologi… [Phys. Rev. Lett. 115, 127203] Published Tue Sep 15, 2015

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Alloy Engineering of Defect Properties in Semiconductors: Suppression of Deep Levels in Transition-Metal Dichalcogenides (2015)

Bing Huang, Mina Yoon, Bobby G. Sumpter, Su-Huai Wei, and Feng Liu

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-19

Beschreibung: Author(s): Bing Huang, Mina Yoon, Bobby G. Sumpter, Su-Huai Wei, and Feng Liu Developing practical approaches to effectively reduce the amount of deep defect levels in semiconductors is critical for their use in electronic and optoelectronic devices, but this still remains a very challenging task. In this Letter, we propose that specific alloying can provide an effective mean… [Phys. Rev. Lett. 115, 126806] Published Fri Sep 18, 2015

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Fractional Quantum Hall States at ν=13/5 and 12/5 and Their Non-Abelian Nature (2015)

W. Zhu, S. S. Gong, F. D. M. Haldane, and D. N. Sheng

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-19

Beschreibung: Author(s): W. Zhu, S. S. Gong, F. D. M. Haldane, and D. N. Sheng Topological quantum states with non-Abelian Fibonacci anyonic excitations are widely sought after for the exotic fundamental physics they would exhibit, and for universal quantum computing applications. The fractional quantum Hall (FQH) state at a filling factor of ν = 12 / 5 is a promising candidate; h… [Phys. Rev. Lett. 115, 126805] Published Fri Sep 18, 2015

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Reservoir interactions during Bose-Einstein condensation: Modified critical scaling in the Kibble-Zurek mechanism of defect formation (2015)

R. G. McDonald and A. S. Bradley

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-09-22

Beschreibung: Author(s): R. G. McDonald and A. S. Bradley Defect formation in Bose-Einstein condensation is studied numerically by solving the stochastic projected Gross-Pitaevskii equation, where a departure from the known universality classes for this second-order phase transition emerges in the presence of energy-damping reservoir interactions. [Phys. Rev. A 92, 033616] Published Fri Sep 18, 2015

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Projected Dipole Model for Quantum Plasmonics (2015)

Wei Yan, Martijn Wubs, and N. Asger Mortensen

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-24

Beschreibung: Author(s): Wei Yan, Martijn Wubs, and N. Asger Mortensen Quantum effects of plasmonic phenomena have been explored through ab initio studies, but only for exceedingly small metallic nanostructures, leaving most experimentally relevant structures too large to handle. We propose instead an effective description with the computationally appealing features of… [Phys. Rev. Lett. 115, 137403] Published Wed Sep 23, 2015

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Semiconducting Graphene from Highly Ordered Substrate Interactions (2015)

M. S. Nevius, M. Conrad, F. Wang, A. Celis, M. N. Nair, A. Taleb-Ibrahimi, A. Tejeda, and E. H. Conrad

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-24

Beschreibung: Author(s): M. S. Nevius, M. Conrad, F. Wang, A. Celis, M. N. Nair, A. Taleb-Ibrahimi, A. Tejeda, and E. H. Conrad Researchers have engineered a large energy band gap in a graphene layer grown on a silicon carbide substrate. [Phys. Rev. Lett. 115, 136802] Published Mon Sep 21, 2015

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Dynamical Mean-Field Theory Plus Numerical Renormalization-Group Study of Spin-Orbital Separation in a Three-Band Hund Metal (2015)

K. M. Stadler, Z. P. Yin, J. von Delft, G. Kotliar, and A. Weichselbaum

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-24

Beschreibung: Author(s): K. M. Stadler, Z. P. Yin, J. von Delft, G. Kotliar, and A. Weichselbaum We show that the numerical renormalization group is a viable multi-band impurity solver for dynamical mean-field theory (DMFT), offering unprecedented real-frequency spectral resolution at arbitrarily low energies and temperatures. We use it to obtain a numerically exact DMFT solution to the Hund me… [Phys. Rev. Lett. 115, 136401] Published Tue Sep 22, 2015

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Competing Magnetic Fluctuations in Iron Pnictide Superconductors: Role of Ferromagnetic Spin Correlations Revealed by NMR (2015)

P. Wiecki, B. Roy, D. C. Johnston, S. L. Bud’ko, P. C. Canfield, and Y. Furukawa

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-24

Beschreibung: Author(s): P. Wiecki, B. Roy, D. C. Johnston, S. L. Bud’ko, P. C. Canfield, and Y. Furukawa In the iron pnictide superconductors, theoretical calculations have consistently shown enhancements of the static magnetic susceptibility at both the stripe-type antiferromagnetic and in-plane ferromagnetic (FM) wave vectors. However, the possible existence of FM fluctuations has not yet been examin… [Phys. Rev. Lett. 115, 137001] Published Tue Sep 22, 2015

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Fully Parameter-Free Calculation of Optical Spectra for Insulators, Semiconductors, and Metals from a Simple Polarization Functional (2015)

J. A. Berger

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-24

Beschreibung: Author(s): J. A. Berger We present a fully parameter-free density-functional approach for the accurate description of optical absorption spectra of insulators, semiconductors, and metals. We show that this can be achieved within time-dependent current-density-functional theory using a simple dynamical polarization function… [Phys. Rev. Lett. 115, 137402] Published Tue Sep 22, 2015

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Swallowtail structure in Fermi superfluids with periodically modulated interactions (2015)

Dongyang Yu, Wei Yi, and Wei Zhang

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Dongyang Yu, Wei Yi, and Wei Zhang We study the superfluid flow in a quasi-one-dimensional Fermi gas with spatially modulated interactions induced by an optical Feshbach resonance. Due to the competition between the periodicity of the modulated interaction and the nonlinearity of the background interaction, an interesting swallowtail… [Phys. Rev. A 92, 033623] Published Thu Sep 24, 2015

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Electric Field Control of Spin Lifetimes in Nb−SrTiO_{3} by Spin-Orbit Fields (2015)

A. M. Kamerbeek, P. Högl, J. Fabian, and T. Banerjee

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): A. M. Kamerbeek, P. Högl, J. Fabian, and T. Banerjee We show electric field control of the spin accumulation at the interface of the oxide semiconductor Nb − SrTiO 3 with Co / AlO x spin injection contacts at room temperature. The in-plane spin lifetime τ ∥ , as well as the ratio of the out-of-plane to in-plane spin lifetime τ ⊥ / τ ∥ , is manipulated by the built… [Phys. Rev. Lett. 115, 136601] Published Thu Sep 24, 2015

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Local Spectroscopic Characterization of Spin and Layer Polarization in WSe_{2} (2015)

Matthew Yankowitz, Devin McKenzie, and Brian J. Le; Roy

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Matthew Yankowitz, Devin McKenzie, and Brian J. LeRoy Tunneling spectroscopy exhibits suppression of intervalley electronic scattering in the valence band of a monolayer of the transition metal dichalcogenide WSe 2 . [Phys. Rev. Lett. 115, 136803] Published Thu Sep 24, 2015

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Successive Magnetic-Field-Induced Transitions and Colossal Magnetoelectric Effect in Ni_{3} TeO_{6} (2015)

Jae Wook Kim, S. Artyukhin, E. D. Mun, M. Jaime, N. Harrison, A. Hansen, J. J. Yang, Y. S. Oh, D. Vanderbilt, V. S. Zapf, and S.-W. Cheong

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Jae Wook Kim, S. Artyukhin, E. D. Mun, M. Jaime, N. Harrison, A. Hansen, J. J. Yang, Y. S. Oh, D. Vanderbilt, V. S. Zapf, and S.-W. Cheong We report the discovery of a metamagnetic phase transition in a polar antiferromagnet Ni 3 TeO 6 that occurs at 52 T. The new phase transition accompanies a colossal magnetoelectric effect, with a magnetic-field-induced polarization change of 0.3 μ C / cm 2 , a value that is 4 times larger than for the spi… [Phys. Rev. Lett. 115, 137201] Published Thu Sep 24, 2015

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Band Engineering of Dirac Surface States in Topological-Insulator-Based van der Waals Heterostructures (2015)

Cui-Zu Chang, Peizhe Tang, Xiao Feng, Kang Li, Xu-Cun Ma, Wenhui Duan, Ke He, and Qi-Kun Xue

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Cui-Zu Chang, Peizhe Tang, Xiao Feng, Kang Li, Xu-Cun Ma, Wenhui Duan, Ke He, and Qi-Kun Xue The existence of a gapless Dirac surface band of a three dimensional (3D) topological insulator (TI) is guaranteed by the nontrivial topological character of the bulk band, yet the surface band dispersion is mainly determined by the environment near the surface. In this Letter , through in situ angle… [Phys. Rev. Lett. 115, 136801] Published Wed Sep 23, 2015

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Mean-field yrast spectrum and persistent currents in a two-component Bose gas with interaction asymmetry (2015)

Z. Wu, E. Zaremba, J. Smyrnakis, M. Magiropoulos, Nikolaos K. Efremidis, and G. M. Kavoulakis

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-09-30

Beschreibung: Author(s): Z. Wu, E. Zaremba, J. Smyrnakis, M. Magiropoulos, Nikolaos K. Efremidis, and G. M. Kavoulakis We analyze the mean-field yrast spectrum of a two-component Bose gas in the ring geometry with arbitrary interaction asymmetry. Of particular interest is the possibility that the yrast spectrum develops local minima at which persistent superfluid flow can occur. By analyzing the mean-field energy fu… [Phys. Rev. A 92, 033630] Published Tue Sep 29, 2015

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Quantum impurity in a one-dimensional trapped Bose gas (2015)

A. S. Dehkharghani, A. G. Volosniev, and N. T. Zinner

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-09-30

Beschreibung: Author(s): A. S. Dehkharghani, A. G. Volosniev, and N. T. Zinner We present a theoretical framework for describing an impurity in a trapped Bose system in one spatial dimension. The theory handles any external confinement, arbitrary mass ratios, and a weak interaction may be included between the Bose particles. To demonstrate our technique, we calculate the groun… [Phys. Rev. A 92, 031601(R)] Published Tue Sep 29, 2015

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Ferromagnetic Spin Fluctuation and Unconventional Superconductivity in Rb_{2} Cr_{3} As_{3} Revealed by ^{75} As NMR and NQR (2015)

J. Yang, Z. T. Tang, G. H. Cao, and Guo-qing Zheng

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-30

Beschreibung: Author(s): J. Yang, Z. T. Tang, G. H. Cao, and Guo-qing Zheng We report As 75 nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) studies on the superconductor Rb 2 Cr 3 As 3 with a quasi-one-dimensional crystal structure. Below T ∼ 100 K , the spin-lattice relaxation rate ( 1 / T 1 ) divided by temperature, 1 / T 1 T , increases upon cooling down to T c = 4.8 … [Phys. Rev. Lett. 115, 147002] Published Tue Sep 29, 2015

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Spreading of entanglement and steering along small Bose-Hubbard chains (2015)

M. K. Olsen

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): M. K. Olsen We investigate how entanglement spreads along small Bose-Hubbard chains, with only the first well initially occupied by a mesoscopic number of atoms, as the number of sites increases. For two- and three-well chains in the noninteracting case, we are able to obtain analytical solutions and show that … [Phys. Rev. A 92, 033627] Published Mon Sep 28, 2015

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π Berry phase and topological excitation in interacting boson-fermion mixtures (2015)

Huaiming Guo

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Huaiming Guo The topological property of a boson-fermion mixture in a one-dimensional optical superlattice is studied and the topological insulating phase of an interacting boson-fermion mixture characterized by a nontrivial Berry phase is identified. The single-particle and boson-fermion exchanging excitation s… [Phys. Rev. A 92, 033625] Published Mon Sep 28, 2015

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Quantum Oscillations without a Fermi Surface and the Anomalous de Haas–van Alphen Effect (2015)

Johannes Knolle and Nigel R. Cooper

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Johannes Knolle and Nigel R. Cooper The Fermi surface of a metal is typically detected via quantum oscillations of its thermodynamic properties in response to a changing applied magnetic field. A microscopic model shows that these oscillations also occur in a band insulator, despite the absence of a Fermi surface. [Phys. Rev. Lett. 115, 146401] Published Mon Sep 28, 2015

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Size-Induced Depression of First-Order Transition Lines and Entropy Jump in Extremely Layered Nanocrystalline Vortex Matter (2015)

M. I. Dolz, Y. Fasano, N. R. Cejas Bolecek, H. Pastoriza, V. Mosser, M. Li, and M. Konczykowski

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): M. I. Dolz, Y. Fasano, N. R. Cejas Bolecek, H. Pastoriza, V. Mosser, M. Li, and M. Konczykowski We detect the persistence of the solidification and order-disorder first-order transition lines in the phase diagram of nanocrystalline Bi 2 Sr 2 CaCu 2 O 8 vortex matter down to a system size of less than one hundred vortices. The temperature location of the vortex solidification transition line is not al… [Phys. Rev. Lett. 115, 137003] Published Fri Sep 25, 2015

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Observation of a Helical Luttinger Liquid in InAs/GaSb Quantum Spin Hall Edges (2015)

Tingxin Li, Pengjie Wang, Hailong Fu, Lingjie Du, Kate A. Schreiber, Xiaoyang Mu, Xiaoxue Liu, Gerard Sullivan, Gábor A. Csáthy, Xi Lin, and Rui-Rui Du

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Tingxin Li, Pengjie Wang, Hailong Fu, Lingjie Du, Kate A. Schreiber, Xiaoyang Mu, Xiaoxue Liu, Gerard Sullivan, Gábor A. Csáthy, Xi Lin, and Rui-Rui Du Strong electron-electron interactions are observed in one dimensional InAs/GaSb quantum spin Hall insulators. [Phys. Rev. Lett. 115, 136804] Published Fri Sep 25, 2015

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Many-Body Theory of Ultrafast Demagnetization and Angular Momentum Transfer in Ferromagnetic Transition Metals (2015)

W. Töws and G. M. Pastor

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-21

Beschreibung: Author(s): W. Töws and G. M. Pastor Exact calculated time evolutions in the framework of a many-electron model of itinerant magnetism provide new insights into the laser-induced ultrafast demagnetization observed in ferromagnetic (FM) transition metal thin films. The interplay between local spin-orbit interactions and interatomic hopp… [Phys. Rev. Lett. 115, 217204] Published Fri Nov 20, 2015

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Quantum Nonlinear Hall Effect Induced by Berry Curvature Dipole in Time-Reversal Invariant Materials (2015)

Inti Sodemann and Liang Fu

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-21

Beschreibung: Author(s): Inti Sodemann and Liang Fu It is well known that a nonvanishing Hall conductivity requires broken time-reversal symmetry. However, in this work, we demonstrate that Hall-like currents can occur in second-order response to external electric fields in a wide class of time-reversal invariant and inversion breaking materials, at … [Phys. Rev. Lett. 115, 216806] Published Fri Nov 20, 2015

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Enhancing quantum coherence with short-range correlated disorder (2015)

P. Capuzzi, M. Gattobigio, and P. Vignolo

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-11-21

Beschreibung: Author(s): P. Capuzzi, M. Gattobigio, and P. Vignolo We introduce a two-dimensional short-range correlated disorder that is the natural generalization of the well-known one-dimensional dual random dimer model [D. H. Dunlap et al. , Phys. Rev. Lett. 65 , 88 (1990) ]. We demonstrate that, as in one dimension, this model induces a localization-delocalizati… [Phys. Rev. A 92, 053622] Published Fri Nov 20, 2015

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Magnetic Field Tuning and Quantum Interference in a Cooper Pair Splitter (2015)

G. Fülöp, F. Domínguez, S. d’Hollosy, A. Baumgartner, P. Makk, M. H. Madsen, V. A. Guzenko, J. Nygård, C. Schönenberger, A. Levy Yeyati, and S. Csonka

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): G. Fülöp, F. Domínguez, S. d’Hollosy, A. Baumgartner, P. Makk, M. H. Madsen, V. A. Guzenko, J. Nygård, C. Schönenberger, A. Levy Yeyati, and S. Csonka Cooper pair splitting (CPS) is a process in which the electrons of the naturally occurring spin-singlet pairs in a superconductor are spatially separated using two quantum dots. Here, we investigate the evolution of the conductance correlations in an InAs CPS device in the presence of an external ma… [Phys. Rev. Lett. 115, 227003] Published Wed Nov 25, 2015

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Spin-Current to Charge-Current Conversion and Magnetoresistance in a Hybrid Structure of Graphene and Yttrium Iron Garnet (2015)

J. B. S. Mendes, O. Alves Santos, L. M. Meireles, R. G. Lacerda, L. H. Vilela-Leão, F. L. A. Machado, R. L. Rodríguez-Suárez, A. Azevedo, and S. M. Rezende

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): J. B. S. Mendes, O. Alves Santos, L. M. Meireles, R. G. Lacerda, L. H. Vilela-Leão, F. L. A. Machado, R. L. Rodríguez-Suárez, A. Azevedo, and S. M. Rezende The use of graphene in spintronic devices depends, among other things, on its ability to convert a spin excitation into an electric charge signal, a phenomenon that requires a spin-orbit coupling (SOC). Here we report the observation of two effects that show the existence of SOC in large-area CVD gr… [Phys. Rev. Lett. 115, 226601] Published Wed Nov 25, 2015

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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Leggett Modes and the Anderson-Higgs Mechanism in Superconductors without Inversion Symmetry (2015)

Nikolaj Bittner, Dietrich Einzel, Ludwig Klam, and Dirk Manske

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Nikolaj Bittner, Dietrich Einzel, Ludwig Klam, and Dirk Manske We develop a microscopic and gauge-invariant theory for collective modes resulting from the phase of the superconducting order parameter in noncentrosymmetric superconductors. Considering various crystal symmetries, we derive the corresponding gauge mode ω G ( q ) and find, in particular, new Leggett mo… [Phys. Rev. Lett. 115, 227002] Published Tue Nov 24, 2015

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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Suppression of Three-Dimensional Charge Density Wave Ordering via Thickness Control (2015)

Gideok Kim, Michael Neumann, Minu Kim, Manh Duc Le, Tae Dong Kang, and Tae Won Noh

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Gideok Kim, Michael Neumann, Minu Kim, Manh Duc Le, Tae Dong Kang, and Tae Won Noh Barium bismuth oxide ( BaBiO 3 ) is the end member of two families of high- T c superconductors, i.e., BaPb 1 − x Bi x O 3 and Ba 1 − x K x BiO 3 . The undoped parent compound is an insulator, exhibiting a charge density wave that is strongly linked to a static breathing distortion in the oxygen sublattice of the perov… [Phys. Rev. Lett. 115, 226402] Published Tue Nov 24, 2015

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

Print ISSN: 0031-9007

Digitale ISSN: 1079-7114

Thema: Physik

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Phase diagram of the three-dimensional Anderson model for short-range speckle potentials (2015)

M. Pasek, Z. Zhao, D. Delande, and G. Orso

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-11-19

Beschreibung: Author(s): M. Pasek, Z. Zhao, D. Delande, and G. Orso A discrepancy between existing theories and essentially exact numerical results on the asymmetry of the mobility edge for Anderson localization is now resolved, where an improved single-particle Green’s function — a crucial component that could be used in existing theories for other relevant studies — is found to bridge the gap. [Phys. Rev. A 92, 053618] Published Wed Nov 18, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

Publiziert von American Physical Society (APS)

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Effects of gapless bosonic fluctuations on Majorana fermions in an atomic wire coupled to a molecular reservoir (2015)

Ying Hu and Mikhail A. Baranov

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-11-19

Beschreibung: Author(s): Ying Hu and Mikhail A. Baranov We discuss the effects of quantum and thermal fluctuations on the Majorana edge states in a topological atomic wire coupled to a superfluid molecular gas with gapless excitations. We find that the coupling between the Majorana edge states remains exponentially decaying with the length of the wire, e… [Phys. Rev. A 92, 053615] Published Tue Nov 17, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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