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Monographie ausleihbar

F-&-E-Verträge - das ist zu beachten : gewerblicher Rechtsschutz, Kartellrecht, Compliance, Steuerrecht (2011)

Milbradt, Claudia ; Besen, Marc

Stuttgart [u.a.] : Boorberg

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Signatur: IASS 15.89488

Schlagwort(e): Deutschland ; Forschung und Entwicklung ; Vertragsrecht

Materialart: Monographie ausleihbar

Seiten: 183 S. , Ill., graph. Darst. , 22 cm

ISBN: 9783415046658 (Pp.)

URL: Inhaltsverzeichnis

Sprache: Deutsch

Zweigbibliothek: RIFS Bibliothek

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Optical rogue waves in telecommunication data streams (2011)

Sergey Vergeles and Sergei K. Turitsyn

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-07

Beschreibung: Author(s): Sergey Vergeles and Sergei K. Turitsyn Large broadening of short optical pulses due to fiber dispersion leads to a strong overlap in information data streams resulting in statistical deviations of the local power from its average. We present a theoretical analysis of rare events of high-intensity fluctuations—optical freak waves—that occ... [Phys. Rev. A 83, 061801] Published Mon Jun 06, 2011

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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Nonlinear features of quantum fluctuations in a slow-inversion laser (2011)

E. G. Lariontsev

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-07

Beschreibung: Author(s): E. G. Lariontsev We study the field correlation functions and the natural laser spectrum for a slow-inversion laser with the thresholdless intensity fluctuations. In such a laser, the spontaneous-emission-driven relaxation oscillations are responsible for some unique features: The field correlation function oscillat... [Phys. Rev. A 83, 063803] Published Mon Jun 06, 2011

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

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Digitale ISSN: 1094-1622

Thema: Physik

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Collective two-particle resonances induced by photon entanglement (2011)

Marten Richter and Shaul Mukamel

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-09

Beschreibung: Author(s): Marten Richter and Shaul Mukamel An assembly of noninteracting atoms may become correlated upon interaction with entangled photons, and certain elements of their joint density matrix can then show collective resonances. We explore experimental signatures of these resonances in the nonlinear response of a pair of two-level atoms. We... [Phys. Rev. A 83, 063805] Published Wed Jun 08, 2011

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

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Two-dimensional Fe-based half-metals with vanishing net magnetization (2011)

Masao Nakao

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-09

Beschreibung: Author(s): Masao Nakao We discuss quasi-two-dimensional (2D) half-metallic (HM) antiferromagnets (AFMs), or fully compensated half-metallic ferrimagnets, that have no spontaneous magnetization, yet have 100% spin polarization of their conduction electrons. Using a full-potential augmented plane-wave method within density ... [Phys. Rev. B 83, 214404] Published Wed Jun 08, 2011

Schlagwort(e): Magnetism

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Nonlinear behavior of geometric phases induced by photon pairs (2011)

H. Kobayashi, Y. Ikeda, S. Tamate, T. Nakanishi, and M. Kitano

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-10

Beschreibung: Author(s): H. Kobayashi, Y. Ikeda, S. Tamate, T. Nakanishi, and M. Kitano In this study, we observe the nonlinear behavior of the two-photon geometric phase for polarization states using time-correlated photon pairs. This phase manifests as a shift of two-photon interference fringes. Under certain arrangements, the geometric phase can vary nonlinearly and become very sens... [Phys. Rev. A 83, 063808] Published Thu Jun 09, 2011

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

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Theoretical study of the role of the tip in enhancing the sensitivity of differential conductance tunneling spectroscopy on magnetic surfaces (2011)

Krisztián Palotás, Werner A. Hofer, and László Szunyogh

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-11

Beschreibung: Author(s): Krisztián Palotás, Werner A. Hofer, and László Szunyogh Based on a simple model for spin-polarized scanning tunneling spectroscopy (SP-STS), we study how tip magnetization and electronic structure affects the differential conductance ( dI / dV ) tunneling spectrum of an Fe(001) surface. We take into account energy dependence of the vacuum decay of electron s... [Phys. Rev. B 83, 214410] Published Fri Jun 10, 2011

Schlagwort(e): Magnetism

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Energetic stability and magnetic coupling in (Cr_{1-x}Fe_{x})_{2}O_{3}: Evidence for a ferrimagnetic ilmenite-type superlattice from first principles (2011)

Hasan Sadat Nabi and Rossitza Pentcheva

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-17

Beschreibung: Author(s): Hasan Sadat Nabi and Rossitza Pentcheva Based on density functional theory (DFT) calculations with a Hubbard U -term, we explore the possibility to design an artificial ferrimagnet FeCrO 3 of ilmenite type out of the two antiferromagnets α - Fe 2 O 3 and α - Cr 2 O 3 . By varying the concentration of Fe in α -Cr 2 O 3 , we provide a phase diagram of the re... [Phys. Rev. B 83, 214424] Published Thu Jun 16, 2011

Schlagwort(e): Magnetism

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Long-range magnetic ordering in Na_{2}IrO_{3} (2011)

X. Liu, T. Berlijn, W.-G. Yin, W. Ku, A. Tsvelik, Young-June Kim, H. Gretarsson, Yogesh Singh, P. Gegenwart, and J. P. Hill

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-17

Beschreibung: Author(s): X. Liu, T. Berlijn, W.-G. Yin, W. Ku, A. Tsvelik, Young-June Kim, H. Gretarsson, Yogesh Singh, P. Gegenwart, and J. P. Hill We report a combined experimental and theoretical investigation of the magnetic structure of the honeycomb-lattice magnet Na 2 IrO 3 , a candidate for a realization of a gapless spin liquid. Using resonant x-ray magnetic scattering at the Ir L 3 edge, we find three-dimensional long-range antiferromagneti... [Phys. Rev. B 83, 220403] Published Thu Jun 16, 2011

Schlagwort(e): Magnetism

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Subwavelength optical microscopy in the far field (2011)

Qingqing Sun, M. Al-Amri, Marlan O. Scully, and M. Suhail Zubairy

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-17

Beschreibung: Author(s): Qingqing Sun, M. Al-Amri, Marlan O. Scully, and M. Suhail Zubairy We present a procedure for subwavelength optical microscopy. The identical atoms are distributed on a plane and shined with a standing wave. We rotate the plane to different angles and record the resonant fluorescence spectra in the far field, from which we can obtain their distance and location inf... [Phys. Rev. A 83, 063818] Published Thu Jun 16, 2011

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

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Spin-wave damping in ferromagnetic stripes with inhomogeneous magnetization (2011)

Hoa T. Nguyen, A. Akbari-Sharbaf, and M. G. Cottam

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-17

Beschreibung: Author(s): Hoa T. Nguyen, A. Akbari-Sharbaf, and M. G. Cottam A theory is presented for the interactions between the dipole-exchange spin waves in ferromagnetic nanowires with a stripe geometry. A Hamiltonian-based approach is used in order to extend earlier results for the linear (or noninteracting) spin waves to include the leading nonlinear processes due to... [Phys. Rev. B 83, 214423] Published Thu Jun 16, 2011

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Quantum correlations and violation of the Bell inequality induced by an external field in a two-photon radiative cascade (2011)

Luqi Yuan and Sumanta Das

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-18

Beschreibung: Author(s): Luqi Yuan and Sumanta Das We study the polarization-dependent second-order correlation of a pair of photons emitted in a four-level radiative cascade driven by an external field. It is found that the quantum correlations of the emitted photons, degraded by the energy splitting of the intermediate levels in the radiative casc... [Phys. Rev. A 83, 063819] Published Fri Jun 17, 2011

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

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Composition-tuned smeared phase transitions (2011)

Fawaz Hrahsheh, David Nozadze, and Thomas Vojta

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-18

Beschreibung: Author(s): Fawaz Hrahsheh, David Nozadze, and Thomas Vojta Phase transitions in random systems are smeared if individual spatial regions can order independently of the bulk system. In this paper, we study such smeared phase transitions (both classical and quantum) in substitutional alloys A 1- x B x that can be tuned from an ordered phase at composition x =0 to ... [Phys. Rev. B 83, 224402] Published Fri Jun 17, 2011

Schlagwort(e): Magnetism

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Light storage in an optically thick atomic ensemble under conditions of electromagnetically induced transparency and four-wave mixing (2011)

Nathaniel B. Phillips, Alexey V. Gorshkov, and Irina Novikova

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-21

Beschreibung: Author(s): Nathaniel B. Phillips, Alexey V. Gorshkov, and Irina Novikova We study the modification of a traditional electromagnetically induced transparency (EIT) stored-light technique that includes both EIT and four-wave mixing (FWM) in an ensemble of hot Rb atoms. The standard treatment of light storage involves the coherent and reversible mapping of one photonic mode... [Phys. Rev. A 83, 063823] Published Mon Jun 20, 2011

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

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Spatiotemporal vortex solitons in hexagonal arrays of waveguides (2011)

Hervé Leblond, Boris A. Malomed, and Dumitru Mihalache

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-21

Beschreibung: Author(s): Hervé Leblond, Boris A. Malomed, and Dumitru Mihalache By means of a systematic numerical analysis, we demonstrate that hexagonal lattices of parallel linearly coupled waveguides, with the intrinsic cubic self-focusing nonlinearity, give rise to three species of stable semidiscrete complexes (which are continuous in the longitudinal direction) with embe... [Phys. Rev. A 83, 063825] Published Mon Jun 20, 2011

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

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Generation of optical vortices in layered helical waveguides (2011)

C. N. Alexeyev, T. A. Fadeyeva, B. P. Lapin, and M. A. Yavorsky

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-21

Beschreibung: Author(s): C. N. Alexeyev, T. A. Fadeyeva, B. P. Lapin, and M. A. Yavorsky We study the possibility of changing the topological charge of incident beams by layered helical structures consisting of planar layers. We show that such structures can effectively change the topological charge of the incoming beam by unity. The problem of the fundamental mode and optical vortex pa... [Phys. Rev. A 83, 063820] Published Mon Jun 20, 2011

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

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17

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Entanglement entropy of the two-dimensional Heisenberg antiferromagnet (2011)

H. Francis Song, Nicolas Laflorencie, Stephan Rachel, and Karyn Le Hur

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-22

Beschreibung: Author(s): H. Francis Song, Nicolas Laflorencie, Stephan Rachel, and Karyn Le Hur We compute the von Neumann and generalized Rényi entanglement entropies in the ground-state of the spin- 1/2 antiferromagnetic Heisenberg model on the square lattice using the modified spin-wave theory for finite lattices. The addition of a staggered magnetic field to regularize the zero modes associ... [Phys. Rev. B 83, 224410] Published Tue Jun 21, 2011

Schlagwort(e): Magnetism

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Few-photon transport in low-dimensional systems (2011)

Paolo Longo, Peter Schmitteckert, and Kurt Busch

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-23

Beschreibung: Author(s): Paolo Longo, Peter Schmitteckert, and Kurt Busch We analyze the role of quantum interference effects induced by an embedded two-level system on the photon transport properties in waveguiding structures that exhibit cutoffs (band edges) in their dispersion relation. In particular, we demonstrate that these systems invariably exhibit single-particle... [Phys. Rev. A 83, 063828] Published Wed Jun 22, 2011

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

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Switching dynamics of a magnetostrictive single-domain nanomagnet subjected to stress (2011)

Kuntal Roy, Supriyo Bandyopadhyay, and Jayasimha Atulasimha

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-23

Beschreibung: Author(s): Kuntal Roy, Supriyo Bandyopadhyay, and Jayasimha Atulasimha The temporal evolution of the magnetization vector of a single-domain magnetostrictive nanomagnet, subjected to in-plane stress, is studied by solving the Landau-Lifshitz-Gilbert equation. The stress is ramped up linearly in time, and the switching delay, which is the time it takes for the magnetiza... [Phys. Rev. B 83, 224412] Published Wed Jun 22, 2011

Schlagwort(e): Magnetism

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Exchange interaction between magnetic adatoms on surfaces of noble metals (2011)

E. Simon, B. Újfalussy, B. Lazarovits, A. Szilva, L. Szunyogh, and G. M. Stocks

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-24

Beschreibung: Author(s): E. Simon, B. Újfalussy, B. Lazarovits, A. Szilva, L. Szunyogh, and G. M. Stocks We present first-principles calculations of the exchange interactions between magnetic impurities deposited on (001), (110), and (111) surfaces of Cu and Au and analyze them, in particular, in the asymptotic regime. For the (110) and the (111) surfaces, we demonstrate that the interaction shows an o... [Phys. Rev. B 83, 224416] Published Thu Jun 23, 2011

Schlagwort(e): Magnetism

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Semiclassical approach to electron spin resonance in quantum spin systems (2011)

Shunsuke C. Furuya, Masaki Oshikawa, and Ian Affleck

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-24

Beschreibung: Author(s): Shunsuke C. Furuya, Masaki Oshikawa, and Ian Affleck We develop a semiclassical approximation to electron spin resonance in quantum spin systems, based on the rotor or nonlinear σ model. The classical time evolution is studied using molecular dynamics while random initial conditions are sampled using classical Monte Carlo methods. Although the approxi... [Phys. Rev. B 83, 224417] Published Thu Jun 23, 2011

Schlagwort(e): Magnetism

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Influence of crystallite size and temperature on the antiferromagnetic helices of terbium and holmium metal (2011)

A. Michels, J.-P. Bick, R. Birringer, A. Ferdinand, J. Baller, R. Sanctuary, S. Philippi, D. Lott, S. Balog, E. Rotenberg, G. Kaindl, and K. M. Döbrich

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-24

Beschreibung: Author(s): A. Michels, J.-P. Bick, R. Birringer, A. Ferdinand, J. Baller, R. Sanctuary, S. Philippi, D. Lott, S. Balog, E. Rotenberg, G. Kaindl, and K. M. Döbrich We report on the results of grain-size and temperature-dependent magnetization, specific-heat, and neutron-scattering experiments on the heavy rare-earth metals terbium and holmium, with particular emphasis on the temperature regions where the helical antiferromagnetic phases exist. In contrast to H... [Phys. Rev. B 83, 224415] Published Thu Jun 23, 2011

Schlagwort(e): Magnetism

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Magnetic antivortex-core reversal by rotating magnetic fields (2011)

Thomas Kamionka, Michael Martens, Kang Wei Chou, André Drews, Tolek Tyliszczak, Hermann Stoll, Bartel Van Waeyenberge, and Guido Meier

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-28

Beschreibung: Author(s): Thomas Kamionka, Michael Martens, Kang Wei Chou, André Drews, Tolek Tyliszczak, Hermann Stoll, Bartel Van Waeyenberge, and Guido Meier Magnetic vortices and antivortices are usually observed coexisting in cross-tie walls within ferromagnetic thin films. An antivortex can be isolated by utilizing the shape anisotropy. The isolation offers the possibility to investigate its fundamental dynamics as a two-dimensional oscillator in a co... [Phys. Rev. B 83, 224422] Published Mon Jun 27, 2011

Schlagwort(e): Magnetism

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Laser phase noise effects on the dynamics of optomechanical resonators (2011)

Gregory A. Phelps and Pierre Meystre

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-28

Beschreibung: Author(s): Gregory A. Phelps and Pierre Meystre We investigate theoretically the influence of laser phase noise on the cooling and heating of a generic cavity optomechanical system. We derive the back-action damping and heating rates and the mechanical frequency shift of the radiation-pressure-driven oscillating mirror, and derive the minimum pho... [Phys. Rev. A 83, 063838] Published Mon Jun 27, 2011

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

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Quantum path signatures in harmonic spectra from metal plasma (2011)

R. A. Ganeev, C. Hutchison, T. Siegel, A. Zaïr, and J. P. Marangos

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-28

Beschreibung: Author(s): R. A. Ganeev, C. Hutchison, T. Siegel, A. Zaïr, and J. P. Marangos We have observed the signatures of quantum trajectories while generating harmonics in metal plasmas by using a high pulse repetition rate (1-kHz) Ti:sapphire laser source. We present how focusing conditions, laser intensity, plasma concentration, and the chirp of laser radiation influence the observ... [Phys. Rev. A 83, 063837] Published Mon Jun 27, 2011

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

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Comment on “Transition from Bose glass to a condensate of triplons in Tl_{1–x}K_{x}CuCl_{3}” (2011)

A. Zheludev and D. Hüvonen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-28

Beschreibung: Author(s): A. Zheludev and D. Hüvonen We argue that the interpretation of the calorimetric data for disordered quantum antiferromagnets Tl 1– x K x CuCl 3 in terms of Bose glass physics by F. Yamada et al. in [Phys. Rev. B 83 , 020409(R) (2011) ] is not unambiguous. A consistent analysis shows no difference in the crossover critical index for t... [Phys. Rev. B 83, 216401] Published Mon Jun 27, 2011

Schlagwort(e): Magnetism

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Superspin glass originating from dipolar interaction with controlled interparticle distance among γ-Fe_{2}O_{3} nanoparticles with silica shells (2011)

Kosuke Hiroi, Katsuyoshi Komatsu, and Tetsuya Sato

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-29

Beschreibung: Author(s): Kosuke Hiroi, Katsuyoshi Komatsu, and Tetsuya Sato γ-Fe 2 O 3 /SiO 2 core-shell nanoparticles with different shell thicknesses were prepared to elucidate the condition for superspin-glass (SSG) dynamics. As the shell thickness decreases, the contribution of interparticle dipolar interaction becomes apparent in the magnetic dynamics of nanoparticle assemb... [Phys. Rev. B 83, 224423] Published Tue Jun 28, 2011

Schlagwort(e): Magnetism

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Stationary light pulse in solids with long-lived spin coherence (2011)

Xiao-Jun Zhang, Hai-Hua Wang, Lei Wang, Ren-Gang Wan, Jun Kou, Yun-Fei Fan, Bing Zhang, and Jin-Yue Gao

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-08

Beschreibung: Author(s): Xiao-Jun Zhang, Hai-Hua Wang, Lei Wang, Ren-Gang Wan, Jun Kou, Yun-Fei Fan, Bing Zhang, and Jin-Yue Gao We present a detailed analysis of stationary light pulses (SLP’s) for the case of inhomogeneous broadening in both optical and spin transitions, which is normally found in solid materials with long-lived spin coherence. By solving the Langevin equations of motion for the density matrix elements unde... [Phys. Rev. A 83, 063804] Published Tue Jun 07, 2011

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

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Optimal phase estimation with arbitrary a priori knowledge (2011)

Rafał Demkowicz-Dobrzański

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-21

Beschreibung: Author(s): Rafał Demkowicz-Dobrzański The optimal-phase estimation strategy is derived when partial a priori knowledge on the estimated phase is available. The solution is found with the help of the most famous result from the entanglement theory: the positive partial transpose criterion. The structure of the optimal measurements, estim... [Phys. Rev. A 83, 061802] Published Mon Jun 20, 2011

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

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Coherent scattering by a spherical medium of resonant atoms (2011)

Sudhakar Prasad and Roy J. Glauber

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-21

Beschreibung: Author(s): Sudhakar Prasad and Roy J. Glauber We consider the problem of coherent resonant scattering of electromagnetic waves by a spherical medium of two-level atoms. The frequency dependence of the scattering amplitudes and cross sections reveals a complex structure of narrow peaks and dips. We relate these scattering resonances to the coope... [Phys. Rev. A 83, 063821] Published Mon Jun 20, 2011

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

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All-optical discrete vortex switch (2011)

Anton S. Desyatnikov, Mark R. Dennis, and Albert Ferrando

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-21

Beschreibung: Author(s): Anton S. Desyatnikov, Mark R. Dennis, and Albert Ferrando We introduce discrete vortex solitons and vortex breathers in circular arrays of nonlinear waveguides. The simplest vortex breather in a four-waveguide coupler is a nonlinear dynamic state changing its topological charge between +1 and -1 periodically during propagation. We find the stability domain... [Phys. Rev. A 83, 063822] Published Mon Jun 20, 2011

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

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Coherent pump-probe spectroscopy in sodium vapor: From electromagnetically induced transparency to parametric amplification (2011)

Ken-ichi Takahashi, Nobuhito Hayashi, Hiroaki Kido, Shota Sugimura, Naoya Hombo, and Masaharu Mitsunaga

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-21

Beschreibung: Author(s): Ken-ichi Takahashi, Nobuhito Hayashi, Hiroaki Kido, Shota Sugimura, Naoya Hombo, and Masaharu Mitsunaga We have theoretically and experimentally investigated coherent pump-probe spectra for the 3 S 1/2 - 3 P 1/2 D 1 transition of sodium atomic vapor. Probe transmission spectra in the presence of a coupling beam exhibit dramatic changes depending on experimental conditions. In the weak-excitation, low-atomic-... [Phys. Rev. A 83, 063824] Published Mon Jun 20, 2011

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

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Disappearance of the de Almeida-Thouless line in six dimensions (2011)

M. A. Moore and A. J. Bray

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-21

Beschreibung: Author(s): M. A. Moore and A. J. Bray We show that the Almeida-Thouless line in Ising spin glasses vanishes when their dimension d →6 + as h AT 2 / T c 2 = C ( d -6) 4 (1- T / T c ) d /2-1 , where C is a constant of order unity. It is shown that replica symmetry breaking also stops as d →6 + . Equivalent results that could be checked by simulations are given for... [Phys. Rev. B 83, 224408] Published Mon Jun 20, 2011

Schlagwort(e): Magnetism

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Controlling the stimulated Brillouin scattering of self-focusing nanosecond laser pulses in silica glasses (2011)

Sarah Mauger, Luc Bergé, and Stefan Skupin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-23

Beschreibung: Author(s): Sarah Mauger, Luc Bergé, and Stefan Skupin We numerically investigate the interplay between Kerr self-focusing (SF) and transient stimulated Brillouin scattering (SBS) for nanosecond pulses in bulk silica. The influences of the input power, phase, or amplitude modulations in the pump pulse together with the incident beam shape on the filamen... [Phys. Rev. A 83, 063829] Published Wed Jun 22, 2011

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

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Z_{2} spin liquids in the S=1/2 Heisenberg model on the kagome lattice: A projective symmetry-group study of Schwinger fermion mean-field states (2011)

Yuan-Ming Lu, Ying Ran, and Patrick A. Lee

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-23

Beschreibung: Author(s): Yuan-Ming Lu, Ying Ran, and Patrick A. Lee Due to strong geometric frustration and quantum fluctuation, the S =1/2 quantum Heisenberg antiferromagnet on the kagome lattice has long been considered as an ideal platform to realize a spin liquid (SL), a phase exhibiting fractionalized excitations without any symmetry breaking. A recent numerical... [Phys. Rev. B 83, 224413] Published Wed Jun 22, 2011

Schlagwort(e): Magnetism

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Slow dynamics and field-induced transitions in a mixed-valence oxide solid solution (2011)

M. Charilaou, J. F. Löffler, and A. U. Gehring

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-23

Beschreibung: Author(s): M. Charilaou, J. F. Löffler, and A. U. Gehring In this study, the spin-glass-like properties of ( x )FeTiO 3 – (1- x )Fe 2 O 3 , with x =0.8 and 0.9, as prominent mixed-valence state solid solution, were investigated by means of ac susceptibility and dc magnetization measurements. Dynamic ac susceptibility indicates freezing at finite temperature T f , obeyi... [Phys. Rev. B 83, 224414] Published Wed Jun 22, 2011

Schlagwort(e): Magnetism

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Multimode mediated qubit-qubit coupling and dark-state symmetries in circuit quantum electrodynamics (2011)

S. Filipp, M. Göppl, J. M. Fink, M. Baur, R. Bianchetti, L. Steffen, and A. Wallraff

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-23

Beschreibung: Author(s): S. Filipp, M. Göppl, J. M. Fink, M. Baur, R. Bianchetti, L. Steffen, and A. Wallraff Microwave cavities with high quality factors enable coherent coupling of distant quantum systems. Virtual photons lead to a transverse interaction between qubits when they are nonresonant with the cavity but resonant with each other. We experimentally investigate the inverse scaling of the interqubi... [Phys. Rev. A 83, 063827] Published Wed Jun 22, 2011

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

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Multistability of electromagnetically induced transparency in atom-assisted optomechanical cavities (2011)

Yue Chang, T. Shi, Yu-xi Liu, C. P. Sun, and Franco Nori

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-23

Beschreibung: Author(s): Yue Chang, T. Shi, Yu-xi Liu, C. P. Sun, and Franco Nori We study how an oscillating mirror affects the electromagnetically induced transparency (EIT) of an atomic ensemble confined in a gas cell, which is placed inside a microcavity with an oscillating mirror in one end. The cavity field acts as a probe of the EIT system and also produces a light pressur... [Phys. Rev. A 83, 063826] Published Wed Jun 22, 2011

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

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Lifetime and emission characteristics of collective electronic excitations in two-dimensional optical lattices (2011)

Hashem Zoubi and Helmut Ritsch

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-24

Beschreibung: Author(s): Hashem Zoubi and Helmut Ritsch Collective electronic excitations in planar optical lattices exhibit strong modifications of the radiative damping rate and directional emission pattern as compared to a single excited atom. Collective excitations for long wave numbers and polarizations orthogonal to the lattice plane exhibit superr... [Phys. Rev. A 83, 063831] Published Thu Jun 23, 2011

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

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Few-cycle vector solitons of light (2011)

A. V. Kim and S. A. Skobelev

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-24

Beschreibung: Author(s): A. V. Kim and S. A. Skobelev We present a class of few-cycle elliptically polarized solitary waves in an isotropic Kerr medium. It is proved numerically that they are stable and can be easily excited during pulse propagation. We also propose a method of producing multisolitons with different polarization states and study their ... [Phys. Rev. A 83, 063832] Published Thu Jun 23, 2011

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

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Two-dimensional atom localization via spontaneous emission in a coherently driven five-level M-type atomic system (2011)

Chunling Ding, Jiahua Li, Zhiming Zhan, and Xiaoxue Yang

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-25

Beschreibung: Author(s): Chunling Ding, Jiahua Li, Zhiming Zhan, and Xiaoxue Yang A scheme is proposed for two-dimensional atom localization in the subwavelength domain via controlled spontaneous emission. We consider a five-level M-type atomic system interacting with two orthogonal standing-wave laser fields and the vacuum of the radiation field. The interaction of the atom with... [Phys. Rev. A 83, 063834] Published Fri Jun 24, 2011

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

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Quantum metrology with imperfect states and detectors (2011)

Animesh Datta, Lijian Zhang, Nicholas Thomas-Peter, Uwe Dorner, Brian J. Smith, and Ian A. Walmsley

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-25

Beschreibung: Author(s): Animesh Datta, Lijian Zhang, Nicholas Thomas-Peter, Uwe Dorner, Brian J. Smith, and Ian A. Walmsley Quantum enhancements of precision in metrology can be compromised by system imperfections. These may be mitigated by appropriate optimization of the input state to render it robust, at the expense of making the state difficult to prepare. In this paper, we identify the major sources of imperfection ... [Phys. Rev. A 83, 063836] Published Fri Jun 24, 2011

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

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Cauchy-Schwarz characterization of tripartite quantum correlations in an optical parametric oscillator (2011)

K. Dechoum, W. S. Marques, and A. Z. Khoury

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-29

Beschreibung: Author(s): K. Dechoum, W. S. Marques, and A. Z. Khoury We analyze the three-mode correlation properties of the electromagnetic field in a optical parametric oscillator below-threshold. We employ a perturbative expansion of the Itô equations derived from the positive-P representation of the density matrix. Using the generalized Cauchy-Schwarz inequality,... [Phys. Rev. A 83, 063843] Published Tue Jun 28, 2011

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

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Efficient excitation of a two-level atom by a single photon in a propagating mode (2011)

Yimin Wang, Jiří Minář, Lana Sheridan, and Valerio Scarani

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-29

Beschreibung: Author(s): Yimin Wang, Jiří Minář, Lana Sheridan, and Valerio Scarani State mapping between atoms and photons, and photon-photon interactions play an important role in scalable quantum information processing. We consider the interaction of a two-level atom with a quantized propagating pulse in free space and study the probability P e ( t ) of finding the atom in the excit... [Phys. Rev. A 83, 063842] Published Tue Jun 28, 2011

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

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Spin gap of the three-leg S=3/2 Heisenberg tube (2011)

S. Nishimoto, Y. Fuji, and Y. Ohta

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-29

Beschreibung: Author(s): S. Nishimoto, Y. Fuji, and Y. Ohta The ground-state properties of the three-leg S =3/2 straight Heisenberg tube are studied using the density-matrix renormalization group method. We find that the spin-excitation gap associated with a spontaneous dimerization opens for the whole coupling regime, as seen in the three-leg S =1/2 straight ... [Phys. Rev. B 83, 224425] Published Tue Jun 28, 2011

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Origin of in-plane uniaxial magnetic anisotropy in CoFeB amorphous ferromagnetic thin films (2011)

A. T. Hindmarch, A. W. Rushforth, R. P. Campion, C. H. Marrows, and B. L. Gallagher

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-29

Beschreibung: Author(s): A. T. Hindmarch, A. W. Rushforth, R. P. Campion, C. H. Marrows, and B. L. Gallagher Describing the origin of uniaxial magnetic anisotropy (UMA) is generally problematic in systems other than single crystals. We demonstrate an in-plane UMA in amorphous CoFeB films on GaAs(001) which has the expected symmetry of the interface anisotropy in ferromagnetic films on GaAs(001), but streng... [Phys. Rev. B 83, 212404] Published Tue Jun 28, 2011

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Raman-assisted Rabi resonances in two-mode cavity QED (2011)

P. Grünwald, S. K. Singh, and W. Vogel

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-09

Beschreibung: Author(s): P. Grünwald, S. K. Singh, and W. Vogel The dynamics of a vibronic system in a lossy two-mode cavity is studied, with the first mode being resonant to the electronic transition and the second one being nearly resonant due to Raman transitions. We derive analytical solutions for the dynamics of this system. For a properly chosen detuning o... [Phys. Rev. A 83, 063806] Published Wed Jun 08, 2011

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Systematic analysis of signal-to-noise ratio in bipartite ghost imaging with classical and quantum light (2011)

G. Brida, M. V. Chekhova, G. A. Fornaro, M. Genovese, E. D. Lopaeva, and I. Ruo Berchera

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-09

Beschreibung: Author(s): G. Brida, M. V. Chekhova, G. A. Fornaro, M. Genovese, E. D. Lopaeva, and I. Ruo Berchera We present a complete and exhaustive theory of signal-to-noiseratio in bipartite ghost imaging with classical (thermal) and quantum (twin beams) light. The theory is compared with experiment for both twin beams and thermal light in a certain regime of interest. [Phys. Rev. A 83, 063807] Published Wed Jun 08, 2011

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Phase transitions in the one-dimensional long-range diluted Heisenberg spin glass (2011)

Auditya Sharma and A. P. Young

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-10

Beschreibung: Author(s): Auditya Sharma and A. P. Young We use Monte Carlo simulations to study the one-dimensional long-range diluted Heisenberg spin glass with interactions that fall as a power σ of the distance. Varying the power is argued to be equivalent to varying the space dimension of a short-range model. We are therefore able to study both the m... [Phys. Rev. B 83, 214405] Published Thu Jun 09, 2011

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Dzyaloshinskii-Moriya interaction and spin reorientation transition in the frustrated kagome lattice antiferromagnet (2011)

K. Matan, B. M. Bartlett, J. S. Helton, V. Sikolenko, S. Mat’aš, K. Prokeš, Y. Chen, J. W. Lynn, D. Grohol, T. J. Sato, M. Tokunaga, D. G. Nocera, and Y. S. Lee

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-10

Beschreibung: Author(s): K. Matan, B. M. Bartlett, J. S. Helton, V. Sikolenko, S. Mat’aš, K. Prokeš, Y. Chen, J. W. Lynn, D. Grohol, T. J. Sato, M. Tokunaga, D. G. Nocera, and Y. S. Lee Magnetization, specific heat, and neutron scattering measurements were performed to study a magnetic transition in jarosite, a spin- 5/2 kagome lattice antiferromagnet. When a magnetic field is applied perpendicular to the kagome plane, magnetizations in the ordered state show a sudden increase at a ... [Phys. Rev. B 83, 214406] Published Thu Jun 09, 2011

Schlagwort(e): Magnetism

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Mixed-valence behavior and strong correlation effects of metal phthalocyanines adsorbed on metals (2011)

S. Stepanow, P. S. Miedema, A. Mugarza, G. Ceballos, P. Moras, J. C. Cezar, C. Carbone, F. M. F. de Groot, and P. Gambardella

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-10

Beschreibung: Author(s): S. Stepanow, P. S. Miedema, A. Mugarza, G. Ceballos, P. Moras, J. C. Cezar, C. Carbone, F. M. F. de Groot, and P. Gambardella We investigate the hierarchy of local correlation and hybridization effects in metal-organic molecules adsorbed on metals. Using x-ray magnetic circular dichroism and ligand field multiplet calculations, we demonstrate that the 3 d electronic ground state of monolayer metal-phthalocyanine (CoPc, FePc... [Phys. Rev. B 83, 220401] Published Thu Jun 09, 2011

Schlagwort(e): Magnetism

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Entangled spin-orbital phases in the bilayer Kugel-Khomskii model (2011)

Wojciech Brzezicki and Andrzej M. Oleś

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-11

Beschreibung: Author(s): Wojciech Brzezicki and Andrzej M. Oleś We derive the Kugel-Khomskii spin-orbital model for a bilayer and investigate its phase diagram depending on Hund’s exchange J H and the e g orbital splitting E z . In the (classical) mean-field approach with on-site spin 〈 S i z 〉 and orbital 〈 τ i z 〉 order parameters and factorized spin-and-orbital degrees o... [Phys. Rev. B 83, 214408] Published Fri Jun 10, 2011

Schlagwort(e): Magnetism

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Strong isotopic effect in the electron-mediated nuclear-nuclear interaction in solids (2011)

Frédéric Mentink-Vigier, Laurent Binet, and Didier Gourier

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Frédéric Mentink-Vigier, Laurent Binet, and Didier Gourier We studied the nuclear-nuclear spin interaction mediated by an unpaired electron spin, focusing on an isotopic effect by electron nuclear double resonance (ENDOR) spectroscopy. We investigated a linear cluster Ga-Ti 3+ -Ga in titanium-doped gallium oxyde β -Ga 2 O 3 , whereby the unpaired electron spin den... [Phys. Rev. B 83, 214409] Published Fri Jun 10, 2011

Schlagwort(e): Magnetism

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Photonic-band-gap properties for two-component slow light (2011)

J. Ruseckas, V. Kudriašov, G. Juzeliūnas, R. G. Unanyan, J. Otterbach, and M. Fleischhauer

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-14

Beschreibung: Author(s): J. Ruseckas, V. Kudriašov, G. Juzeliūnas, R. G. Unanyan, J. Otterbach, and M. Fleischhauer We consider two-component “spinor” slow light in an ensemble of atoms coherently driven by two pairs of counterpropagating control laser fields in a double tripod-type linkage scheme. We derive an equation of motion for the spinor slow light (SSL) representing an effective Dirac equation for a massi... [Phys. Rev. A 83, 063811] Published Mon Jun 13, 2011

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

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Simultaneous control of two four-wave-mixing fields via atomic spin coherence (2011)

Xihua Yang, Jiteng Sheng, Utsab Khadka, and Min Xiao

American Physical Society (APS)

In: Physical Review A

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Beschreibung: Author(s): Xihua Yang, Jiteng Sheng, Utsab Khadka, and Min Xiao We report the experimental observation of simultaneous control of two four-wave-mixing fields via an induced atomic spin coherence formed by a Raman process with one coupling field and one probe field in a triple-Λ-type 85 Rb atomic system. It is shown that by changing the atomic density, intensity, ... [Phys. Rev. A 83, 063812] Published Mon Jun 13, 2011

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Unveiling locally linearly polarized vector fields with broken axial symmetry (2011)

Xi-Lin Wang (汪喜林), Kai Lou (娄凯), Jing Chen, Bing Gu (顾兵), Yongnan Li (李勇男), and Hui-Tian Wang (王慧田)

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-14

Beschreibung: Author(s): Xi-Lin Wang (汪喜林), Kai Lou (娄凯), Jing Chen, Bing Gu (顾兵), Yongnan Li (李勇男), and Hui-Tian Wang (王慧田) We explore how the focusing of axial-symmetry-broken vector fields is associated with a sector aperture whose apex coincides with the field axis. Its focused field is azimuthally split into a pair of orthogonal right- and left-handed circularly polarized partial rings which are rotated by angles of ... [Phys. Rev. A 83, 063813] Published Mon Jun 13, 2011

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

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Thermodynamics of the frustrated one-dimensional spin-1/2 Heisenberg ferromagnet in a magnetic field (2011)

M. Härtel, J. Richter, and D. Ihle

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-14

Beschreibung: Author(s): M. Härtel, J. Richter, and D. Ihle We calculate the low-temperature thermodynamic quantities (magnetization, correlation functions, transverse and longitudinal correlation lengths, spin susceptibility, and specific heat) of the frustrated one-dimensional spin-half J 1 - J 2 Heisenberg ferromagnet, i.e., for J 2 〈0.25| J 1 | , in an external... [Phys. Rev. B 83, 214412] Published Mon Jun 13, 2011

Schlagwort(e): Magnetism

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Effects of interfacial noncollinear magnetic structures on spin-dependent conductance in Co_{2}MnSi/MgO/Co_{2}MnSi magnetic tunnel junctions: A first-principles study (2011)

Yoshio Miura, Kazutaka Abe, and Masafumi Shirai

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Yoshio Miura, Kazutaka Abe, and Masafumi Shirai We investigate the effects of spin-flip scattering on tunneling magnetoresistance (TMR) in magnetic tunnel junctions (MTJs) with half-metallic Co 2 MnSi (CMS) and MgO on the basis of the first-principles calculations. We found that noncollinear magnetic structures of interfacial Co spin moments result... [Phys. Rev. B 83, 214411] Published Mon Jun 13, 2011

Schlagwort(e): Magnetism

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Overcoming the spin-multiplicity limit of entropy by means of lattice degrees of freedom: A minimal model (2011)

T. Mukherjee, S. Michalski, R. Skomski, D. J. Sellmyer, and Ch. Binek

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): T. Mukherjee, S. Michalski, R. Skomski, D. J. Sellmyer, and Ch. Binek The discovery of the giant magnetocaloric effect with isothermal field-induced entropy change beyond the spin-multiplicity limit gave rise to some indistinctness in the literature regarding the applicability of fundamental thermodynamics in data analysis. Those misleading interpretations concerning,... [Phys. Rev. B 83, 214413] Published Mon Jun 13, 2011

Schlagwort(e): Magnetism

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Exceptionally strong magnetism in the 4d perovskites RTcO_{3} (R=Ca, Sr, Ba) (2011)

C. Franchini, T. Archer, Jiangang He, Xing-Qiu Chen, A. Filippetti, and S. Sanvito

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-14

Beschreibung: Author(s): C. Franchini, T. Archer, Jiangang He, Xing-Qiu Chen, A. Filippetti, and S. Sanvito The evolution of the magnetic ordering temperature of the 4 d 3 perovskites R TcO 3 ( R =Ca , Sr, Ba) and its relation with its electronic and structural properties has been studied by means of hybrid density functional theory and Monte Carlo simulations. When compared to the most widely studied 3 d perovsk... [Phys. Rev. B 83, 220402] Published Mon Jun 13, 2011

Schlagwort(e): Magnetism

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Garnet superlattice as a transparent above-room-temperature polar magnet (2011)

Y. Krockenberger, J. S. Lee, D. Okuyama, H. Nakao, Y. Murakami, M. Kawasaki, and Y. Tokura

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-15

Beschreibung: Author(s): Y. Krockenberger, J. S. Lee, D. Okuyama, H. Nakao, Y. Murakami, M. Kawasaki, and Y. Tokura The interface magnetic state in the garnet superlattices has been investigated by measuring the magnetization-induced second harmonic generation. Among the superlattice films being composed of sequentially stacked two or three different compositions of garnet layers including a magnetic yttrium iron... [Phys. Rev. B 83, 214414] Published Tue Jun 14, 2011

Schlagwort(e): Magnetism

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Propagation of 0π pulses in a gas of three-level atoms (2011)

Dong Sun, Zoe-Elizabeth Sariyanni, Sumanta Das, and Yuri V. Rostovtsev

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-16

Beschreibung: Author(s): Dong Sun, Zoe-Elizabeth Sariyanni, Sumanta Das, and Yuri V. Rostovtsev We have theoretically studied the pulsed regime of electromagnetically induced transparency. In particular, simulations of propagation of Gaussian and 0 π copropagating laser pulses in a medium consisting of three-level Λ atoms have been performed. It has been found that even at the two-photon resona... [Phys. Rev. A 83, 063815] Published Wed Jun 15, 2011

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

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Dark-bright gap solitons in coupled-mode one-dimensional saturable waveguide arrays (2011)

Rong Dong, Christian E. Rüter, Detlef Kip, Jesús Cuevas, Panayotis G. Kevrekidis, Daohong Song, and Jingjun Xu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-16

Beschreibung: Author(s): Rong Dong, Christian E. Rüter, Detlef Kip, Jesús Cuevas, Panayotis G. Kevrekidis, Daohong Song, and Jingjun Xu In the present work, we consider the dynamics of dark solitons as one mode of a defocusing photorefractive lattice coupled with bright solitons as a second mode of the lattice. Our investigation is motivated by an experiment that illustrates that such coupled states can exist with both components in... [Phys. Rev. A 83, 063816] Published Wed Jun 15, 2011

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

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Antiferromagnetic order in MnO spherical nanoparticles (2011)

C. H. Wang, S. N. Baker, M. D. Lumsden, S. E. Nagler, W. T. Heller, G. A. Baker, P. D. Deen, L. M. D. Cranswick, Y. Su, and A. D. Christianson

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-16

Beschreibung: Author(s): C. H. Wang, S. N. Baker, M. D. Lumsden, S. E. Nagler, W. T. Heller, G. A. Baker, P. D. Deen, L. M. D. Cranswick, Y. Su, and A. D. Christianson We have performed unpolarized and polarized neutron diffraction experiments on monodisperse 8- and 13-nm antiferromagnetic MnO nanoparticles. For the 8-nm sample, the antiferromagnetic transition temperature T N (114 K) is suppressed compared to that in the bulk material (119 K), while for the 13-nm ... [Phys. Rev. B 83, 214418] Published Wed Jun 15, 2011

Schlagwort(e): Magnetism

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High-field magnetization of Ho_{2}Fe_{17} (2011)

Y. Skourski, M. D. Kuz’min, K. P. Skokov, A. V. Andreev, and J. Wosnitza

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Y. Skourski, M. D. Kuz’min, K. P. Skokov, A. V. Andreev, and J. Wosnitza The magnetization of a Ho 2 Fe 17 single crystal has been measured along the principal crystallographic directions in pulsed magnetic fields up to 60 T. Stepwise discontinuities in the magnetization occur at 45 and 55 T along the [120] and [100] directions, respectively. The data allowed us to deduce t... [Phys. Rev. B 83, 214420] Published Wed Jun 15, 2011

Schlagwort(e): Magnetism

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Microscopic origin of magnetic anisotropy in martensitic Ni_{2}MnGa (2011)

P. Klaer, T. Eichhorn, G. Jakob, and H. J. Elmers

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): P. Klaer, T. Eichhorn, G. Jakob, and H. J. Elmers The microscopic origin of magnetic anisotropy in the shape memory alloy Ni 2 MnGa is investigated by means of x-ray magnetic circular dichroism in transmission mode. Field- and angle-dependent dichroism spectra of epitaxial Ni 2 MnGa(101)/MgO(001) films reveal pronounced differences for magnetization al... [Phys. Rev. B 83, 214419] Published Wed Jun 15, 2011

Schlagwort(e): Magnetism

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Antiferromagnetic superexchange via 3d states of titanium in EuTiO_{3} as seen from hybrid Hartree-Fock density functional calculations (2011)

Hirofumi Akamatsu, Yu Kumagai, Fumiyasu Oba, Koji Fujita, Hideo Murakami, Katsuhisa Tanaka, and Isao Tanaka

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Hirofumi Akamatsu, Yu Kumagai, Fumiyasu Oba, Koji Fujita, Hideo Murakami, Katsuhisa Tanaka, and Isao Tanaka A superexchange mechanism between Eu 2+ 4 f spins via the 3 d states of nonmagnetic Ti 4+ ions is proposed through first-principles calculations based on a hybrid Hartree-Fock density functional approach to explain G -type antiferromagnetism in EuTiO 3 . This mechanism is supported by systematic calculatio... [Phys. Rev. B 83, 214421] Published Wed Jun 15, 2011

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X-ray imaging of vortex cores in confined magnetic structures (2011)

Peter Fischer, Mi-Young Im, Shinya Kasai, Keisuke Yamada, Teruo Ono, and André Thiaville

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Peter Fischer, Mi-Young Im, Shinya Kasai, Keisuke Yamada, Teruo Ono, and André Thiaville Cores of magnetic vortices in micron-sized NiFe disk structures, with thicknesses between 150 and 50 nm, were imaged and analyzed by high-resolution magnetic soft x-ray microscopy. A decrease of the vortex-core radius was observed from approximately 38 to 18 nm with decreasing disk thickness. By com... [Phys. Rev. B 83, 212402] Published Wed Jun 15, 2011

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Ultrabright backward-wave biphoton source (2011)

Chih-Sung Chuu and S. E. Harris

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-21

Beschreibung: Author(s): Chih-Sung Chuu and S. E. Harris We calculate the properties of a biphoton source based on resonant backward-wave spontaneous parametric down conversion. We show that the biphotons are generated in a single longitudinal mode having a subnatural linewidth and a Glauber correlation time exceeding 65 ns. [Phys. Rev. A 83, 061803] Published Mon Jun 20, 2011

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Anharmonic effects in magnetoelastic chains (2011)

D. C. Cabra, C. J. Gazza, C. A. Lamas, and H. D. Rosales

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-21

Beschreibung: Author(s): D. C. Cabra, C. J. Gazza, C. A. Lamas, and H. D. Rosales We describe a new mechanism leading to the formation of rational magnetization plateau phases, which is mainly due to the anharmonic spin-phonon coupling. This anharmonicity produces plateaux in the magnetization curve at unexpected values of the magnetization without explicit magnetic frustration i... [Phys. Rev. B 83, 224406] Published Mon Jun 20, 2011

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Spatial manipulation of magnetic damping in ferromagnetic-antiferromagnetic films by ion irradiation (2011)

Jeffrey McCord, Thomas Strache, Ingolf Mönch, Roland Mattheis, and Jürgen Fassbender

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-21

Beschreibung: Author(s): Jeffrey McCord, Thomas Strache, Ingolf Mönch, Roland Mattheis, and Jürgen Fassbender The spatial manipulation of the effective magnetic damping parameter in ferromagnetic-antiferromagnetic-ferromagnetic film systems is shown. By applying ultrathin antiferromagnetic layers in Ni 81 Fe 19 /IrMn/Ni 81 Fe 19 sandwich structures in combination with low fluence Ni-ion irradiation, a lateral cont... [Phys. Rev. B 83, 224407] Published Mon Jun 20, 2011

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Magnetic fluctuations and correlations in MnSi: Evidence for a chiral skyrmion spin liquid phase (2011)

C. Pappas, E. Lelièvre-Berna, P. Bentley, P. Falus, P. Fouquet, and B. Farago

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-21

Beschreibung: Author(s): C. Pappas, E. Lelièvre-Berna, P. Bentley, P. Falus, P. Fouquet, and B. Farago We present a comprehensive analysis of high-resolution neutron scattering data involving neutron spin echo spectroscopy and spherical polarimetry, which confirm the first-order nature of the helical transition in MnSi. The experiments reveal the existence of a totally chiral dynamic phase in a very ... [Phys. Rev. B 83, 224405] Published Mon Jun 20, 2011

Schlagwort(e): Magnetism

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Laser-cooled atoms inside a hollow-core photonic-crystal fiber (2011)

M. Bajcsy, S. Hofferberth, T. Peyronel, V. Balic, Q. Liang, A. S. Zibrov, V. Vuletic, and M. D. Lukin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-24

Beschreibung: Author(s): M. Bajcsy, S. Hofferberth, T. Peyronel, V. Balic, Q. Liang, A. S. Zibrov, V. Vuletic, and M. D. Lukin We describe the loading of laser-cooled rubidium atoms into a single-mode hollow-core photonic-crystal fiber. Inside the fiber, the atoms are confined by a far-detuned optical trap and probed by a weak resonant beam. We describe different loading methods and compare their trade-offs in terms of impl... [Phys. Rev. A 83, 063830] Published Thu Jun 23, 2011

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

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Evidence of three-dimensional Ising ferromagnetism in the A-site-ordered perovskite CaCu_{3}Ge_{4}O_{12} (2011)

J.-G. Cheng, J.-S. Zhou, J. B. Goodenough, Y. T. Su, and Y. Sui

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-24

Beschreibung: Author(s): J.-G. Cheng, J.-S. Zhou, J. B. Goodenough, Y. T. Su, and Y. Sui The A -site-ordered perovskite CaCu 3 Ge 4 O 12 synthesized under high pressure undergoes ferromagnetic spin ordering below T c ≈ 12 K. The critical exponents have been determined from isotherms of magnetization across T c via an iteration process and the Kouvel-Fisher method as well as from specific heat. ... [Phys. Rev. B 83, 212403] Published Thu Jun 23, 2011

Schlagwort(e): Magnetism

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Quantum trajectory analysis of the two-mode three-level atom microlaser (2011)

Tarek A. Elsayed and Abdulaziz Aljalal

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-25

Beschreibung: Author(s): Tarek A. Elsayed and Abdulaziz Aljalal We consider a single-atom laser (microlaser) operating on three-level atoms interacting with a two-mode cavity. The quantum statistical properties of the cavity field at steady state are investigated by the quantum trajectory method which is a Monte Carlo simulation applied to open quantum systems. ... [Phys. Rev. A 83, 063833] Published Fri Jun 24, 2011

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

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Optomechanical sideband cooling of a micromechanical oscillator close to the quantum ground state (2011)

R. Rivière, S. Deléglise, S. Weis, E. Gavartin, O. Arcizet, A. Schliesser, and T. J. Kippenberg

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-25

Beschreibung: Author(s): R. Rivière, S. Deléglise, S. Weis, E. Gavartin, O. Arcizet, A. Schliesser, and T. J. Kippenberg Cooling a mesoscopic mechanical oscillator to its quantum ground state is elementary for the preparation and control of quantum states of mechanical objects. Here, we pre-cool a 70-MHz micromechanical silica oscillator to an occupancy below 200 quanta by thermalizing it with a 600-mK cold 3 He gas. T... [Phys. Rev. A 83, 063835] Published Fri Jun 24, 2011

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

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Critical thickness investigation of magnetic properties in exchange-coupled bilayers (2011)

R. L. Rodríguez-Suárez, L. H. Vilela-Leão, T. Bueno, A. B. Oliveira, J. R. L. de Almeida, P. Landeros, S. M. Rezende, and A. Azevedo

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-25

Beschreibung: Author(s): R. L. Rodríguez-Suárez, L. H. Vilela-Leão, T. Bueno, A. B. Oliveira, J. R. L. de Almeida, P. Landeros, S. M. Rezende, and A. Azevedo We present a systematic investigation of the magnetic properties of two series of polycrystalline ferromagnetic-antiferromagnetic bilayers (FM-AF) of Ni 81 Fe 19 (10nm)/Ir 20 Mn 80 ( t AF ) grown by dc magnetron sputtering. One series was grown at an oblique angle of 50° and the other one was grown at 0°. Ferr... [Phys. Rev. B 83, 224418] Published Fri Jun 24, 2011

Schlagwort(e): Magnetism

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Influence of temperature on the gyrotropic eigenmode of magnetic vortices (2011)

Thomas Kamionka, Michael Martens, André Drews, Benjamin Krüger, Ole Albrecht, and Guido Meier

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-29

Beschreibung: Author(s): Thomas Kamionka, Michael Martens, André Drews, Benjamin Krüger, Ole Albrecht, and Guido Meier Magnetic vortices in ferromagnetic thin-film structures can be excited to gyrate resonantly at a characteristic eigenfrequency. The influence of temperature on the gyrotropic eigenfrequency of vortices in micrometer-sized permalloy squares is studied. Ferromagnetic absorption measurements around roo... [Phys. Rev. B 83, 224424] Published Tue Jun 28, 2011

Schlagwort(e): Magnetism

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Influence of conformational changes in complex molecules on photon statistics of single molecule fluorescence (2011)

I. S. Osad’ko and V. V. Fedyanin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-29

Beschreibung: Author(s): I. S. Osad’ko and V. V. Fedyanin A single complex molecule with conformational changes (conformations 0 and 2) is considered. When such a molecule is irradiated by cw-laser light it can randomly change the intensity or polarization of its fluorescence due to jumps from one conformation to another. In fact, the molecule manifests it... [Phys. Rev. A 83, 063841] Published Tue Jun 28, 2011

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

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Quantum phase transition in an array of coupled dissipative cavities (2011)

Ke Liu, Lei Tan, Chun-Hai Lv, and Wu-Ming Liu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-29

Beschreibung: Author(s): Ke Liu, Lei Tan, Chun-Hai Lv, and Wu-Ming Liu We study the features of superfluid and Mott-insulator states in a two-dimensional array of cavities with a two-level atom embedded in each cavity which is strongly coupled to the cavity field and immersed in a bosonic bath. Employing a different quasiboson approach, we show analytically how the dis... [Phys. Rev. A 83, 063840] Published Tue Jun 28, 2011

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

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Semianalytic theory of self-similar optical propagation and mode locking using a shape-adaptive model pulse (2011)

Christian Jirauschek and F. Ömer Ilday

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-11

Beschreibung: Author(s): Christian Jirauschek and F. Ömer Ilday A semianalytic theory for the pulse dynamics in similariton amplifiers and lasers is presented, based on a model pulse with adaptive shape. By changing a single parameter, this test function can be continuously tweaked between a pure Gaussian and a pure parabolic profile and can even represent sech-... [Phys. Rev. A 83, 063809] Published Fri Jun 10, 2011

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

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Spin-state transitions in CaFeSi_{2}O_{6} and NaFeSi_{2}O_{6} under pressure (2011)

S. V. Streltsov and N. A. Skorikov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-11

Beschreibung: Author(s): S. V. Streltsov and N. A. Skorikov The spin-state transitions in Fe-based clinopyroxenes are predicted and investigated with the use of the band structure calculations within GGA + U approach. The transitions were found to be of first order with critical pressures P c ~40 GPa for CaFeSi 2 O 6 and P c ~60 GPa for NaFeSi 2 O 6 . The spin-state tr... [Phys. Rev. B 83, 214407] Published Fri Jun 10, 2011

Schlagwort(e): Magnetism

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Polarization-dependent ponderomotive gradient force in a standing wave (2011)

P. W. Smorenburg, J. H. M. Kanters, A. Lassise, G. J. H. Brussaard, L. P. J. Kamp, and O. J. Luiten

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-14

Beschreibung: Author(s): P. W. Smorenburg, J. H. M. Kanters, A. Lassise, G. J. H. Brussaard, L. P. J. Kamp, and O. J. Luiten The ponderomotive force is derived for a relativistic charged particle entering an electromagnetic standing wave with a general three-dimensional field distribution and a nonrelativistic intensity, using a perturbation expansion method. It is shown that the well-known ponderomotive gradient force ex... [Phys. Rev. A 83, 063810] Published Mon Jun 13, 2011

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

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Forward four-wave mixing as an effective mechanism for generation of polychromatic correlated fields in a Λ medium (2011)

Maria Erukhimova and Mikhail Tokman

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-15

Beschreibung: Author(s): Maria Erukhimova and Mikhail Tokman The forward four-wave-mixing (FWM) processes are considered in a typical three-level Λ scheme of electromagnetically induced transparency. The effective conversion of monochromatic drive radiation to the polychromatic field with correlated (entangled) components is predicted. The generation is chara... [Phys. Rev. A 83, 063814] Published Tue Jun 14, 2011

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

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Impact of local lattice distortions on the structural stability of Fe-Pd magnetic shape-memory alloys (2011)

Markus E. Gruner and Peter Entel

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-15

Beschreibung: Author(s): Markus E. Gruner and Peter Entel The binding surface of Fe-rich Fe-Pd alloys is explored by means of first-principles calculations in the framework of density functional theory involving unconstrained optimization of the atomic positions within a 108-atom supercell. We find that static displacements arising from geometric optimizat... [Phys. Rev. B 83, 214415] Published Tue Jun 14, 2011

Schlagwort(e): Magnetism

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Pulsating regime of magnetic deflagration in crystals of molecular magnets (2011)

M. Modestov, V. Bychkov, and M. Marklund

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-15

Beschreibung: Author(s): M. Modestov, V. Bychkov, and M. Marklund The stability of a magnetic deflagration front in a media of molecular magnets, such as Mn 12 acetate, is considered. It is demonstrated that stationary deflagration is unstable with respect to one-dimensional perturbations if the energy barrier of the magnets is sufficiently high in comparison with ... [Phys. Rev. B 83, 214417] Published Tue Jun 14, 2011

Schlagwort(e): Magnetism

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Heat transport in quantum spin chains: Relevance of integrability (2011)

Jinshan Wu and Mona Berciu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-15

Beschreibung: Author(s): Jinshan Wu and Mona Berciu We investigate heat transport in various quantum spin chains using the Redfield equation. We find that anomalous heat transport is linked not to the integrability of the Hamiltonian, but to whether it can be mapped to a model of noninteracting fermions. Our results also suggest how seemingly anomalo... [Phys. Rev. B 83, 214416] Published Tue Jun 14, 2011

Schlagwort(e): Magnetism

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Interplay between particle anisotropy and exchange interaction in Fe nanoparticle films (2011)

V. Iannotti, S. Amoruso, G. Ausanio, X. Wang, L. Lanotte, A. C. Barone, G. Margaris, K. N. Trohidou, and D. Fiorani

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-17

Beschreibung: Author(s): V. Iannotti, S. Amoruso, G. Ausanio, X. Wang, L. Lanotte, A. C. Barone, G. Margaris, K. N. Trohidou, and D. Fiorani The magnetic properties of Fe nanoparticles films were investigated by magnetization measurements and Monte Carlo simulations. The films were produced by femtosecond pulsed laser deposition assisted by irradiation of nanoparticles with a nanosecond UV laser pulse, appropriately delayed, during their... [Phys. Rev. B 83, 214422] Published Thu Jun 16, 2011

Schlagwort(e): Magnetism

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Spin Seebeck effect in thin films of the Heusler compound Co_{2}MnSi (2011)

S. Bosu, Y. Sakuraba, K. Uchida, K. Saito, T. Ota, E. Saitoh, and K. Takanashi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-17

Beschreibung: Author(s): S. Bosu, Y. Sakuraba, K. Uchida, K. Saito, T. Ota, E. Saitoh, and K. Takanashi The recently discovered spin Seebeck effect (SSE) which generates spin voltage due to a temperature gradient in ferromagnets, was systematically studied in half-metallic Heusler compound Co 2 MnSi (CMS)/Pt thin films to investigate the effect of spin polarization of ferromagnetic layer on SSE. An epit... [Phys. Rev. B 83, 224401] Published Thu Jun 16, 2011

Schlagwort(e): Magnetism

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Tunable waveguide lattices with nonuniform parity-symmetric tunneling (2011)

Yogesh N. Joglekar, Clinton Thompson, and Gautam Vemuri

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-17

Beschreibung: Author(s): Yogesh N. Joglekar, Clinton Thompson, and Gautam Vemuri We investigate the single-particle time evolution and two-particle quantum correlations in a one-dimensional N -site lattice with a site-dependent nearest-neighbor tunneling function t α ( k )= t 0 [ k ( N - k )] α /2 . Since the bandwidth and the energy-level spacings for such a lattice both depend upon α , we show ... [Phys. Rev. A 83, 063817] Published Thu Jun 16, 2011

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

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Structural, transport, thermodynamic, and neutron diffraction studies of layered R_{2}O_{3}Fe_{2}Se_{2} (R=Ce, Pr, Nd, and Sm) (2011)

N. Ni, S. Jia, Q. Huang, E. Climent-Pascual, and R. J. Cava

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-18

Beschreibung: Author(s): N. Ni, S. Jia, Q. Huang, E. Climent-Pascual, and R. J. Cava We report the structural, transport, and thermodynamic properties of the semiconducting, layered rare-earth iron oxyselenides R 2 O 3 Fe 2 Se 2 ( R =Ce, Pr, Nd, and Sm ), which have crystal structures related to the arsenide superconductors except with in-plane oxygens within the Fe square planes. The activat... [Phys. Rev. B 83, 224403] Published Fri Jun 17, 2011

Schlagwort(e): Magnetism

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Analytical ground state for the Jaynes-Cummings model with ultrastrong coupling (2011)

Yuanwei Zhang, Gang Chen, Lixian Yu, Qifeng Liang, J.-Q. Liang, and Suotang Jia

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2011-06-18

Beschreibung: Author(s): Yuanwei Zhang, Gang Chen, Lixian Yu, Qifeng Liang, J.-Q. Liang, and Suotang Jia We present a generalized variational method to analytically obtain the ground-state properties of the Jaynes-Cummings model with the ultrastrong coupling. An explicit expression for the ground-state energy, which agrees well with the numerical simulation in a wide range of the experimental parameter... [Phys. Rev. A 83, 065802] Published Fri Jun 17, 2011

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

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Two-dimensional XY-like amorphous Co_{68}Fe_{24}Zr_{8}/Al_{70}Zr_{30} multilayers (2011)

Martina Ahlberg, Gabriella Andersson, and Björgvin Hjörvarsson

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-18

Beschreibung: Author(s): Martina Ahlberg, Gabriella Andersson, and Björgvin Hjörvarsson We present an experimental realization of a magnetic two-dimensional XY system using amorphous materials. The classification of the dimensionality is based on the critical behavior of amorphous Co 68 Fe 24 Zr 8 ( d )/Al 70 O 30 (20Å) multilayers, where d =11-16Å . Analysis of the remanent magnetization, the magn... [Phys. Rev. B 83, 224404] Published Fri Jun 17, 2011

Schlagwort(e): Magnetism

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Magnetic phase diagram and critical behavior of electron-doped La_{x}Ca_{1-x}MnO_{3} (0⩽x⩽0.25) nanoparticles (2011)

Yang Wang and Hong Jin Fan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-22

Beschreibung: Author(s): Yang Wang and Hong Jin Fan A comparative study of electron-doped perovskite manganites La x Ca 1-x MnO 3 (0 ⩽ x ⩽ 0.25) in nanoparticle and bulk form is reported. The bulks and nanoparticles exhibit different magnetic evolutions. Overall with increasing x , the bulks have a phase-separated ground state with ferromagnetic (FM) clust... [Phys. Rev. B 83, 224409] Published Tue Jun 21, 2011

Schlagwort(e): Magnetism

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Chiral criticality in the doped helimagnets Mn_{1-y}Fe_{y}Si (2011)

Sergey V. Grigoriev, Evgeny V. Moskvin, Vadim A. Dyadkin, Daniel Lamago, Thomas Wolf, Helmut Eckerlebe, and Sergey V. Maleyev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-22

Beschreibung: Author(s): Sergey V. Grigoriev, Evgeny V. Moskvin, Vadim A. Dyadkin, Daniel Lamago, Thomas Wolf, Helmut Eckerlebe, and Sergey V. Maleyev The critical spin fluctuations in Mn 1- y Fe y Si compounds have been studied by means of ac-susceptibility measurements, polarized neutron small angle scattering, and spin echo spectroscopy. It is shown that these compounds undergo the transition from the paramagnetic to helimagnetic phase through conti... [Phys. Rev. B 83, 224411] Published Tue Jun 21, 2011

Schlagwort(e): Magnetism

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Strain-mediated magnetoelectric coupling in magnetostrictive/piezoelectric heterostructures and resulting high-frequency effects (2011)

K. L. Livesey

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-28

Beschreibung: Author(s): K. L. Livesey Magnetoelectric coupling terms are derived in piezoelectric/magnetostrictive (multiferroic) thin film heterostructures using Landau-Ginzburg free energy expansions in terms of three order parameters: strain, magnetization, and electric polarization. Strain is eliminated using a particular set of int... [Phys. Rev. B 83, 224420] Published Mon Jun 27, 2011

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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97

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Reply to “Comment on ‘Transition from Bose glass to a condensate of triplons in Tl_{1-x}K_{x}CuCl_{3}’ ” (2011)

Fumiko Yamada, Hidekazu Tanaka, Toshio Ono, and Hiroyuki Nojiri

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-28

Beschreibung: Author(s): Fumiko Yamada, Hidekazu Tanaka, Toshio Ono, and Hiroyuki Nojiri Showing low-temperature specific heat and other experimental data and also on the basis of established physics, we argue against the comment made by Zheludev and Hüvonnen critiquing our recent study on the magnetic-field-induced spin ordering and critical behavior in Tl 1- x K x CuCl 3 , which is described... [Phys. Rev. B 83, 216402] Published Mon Jun 27, 2011

Schlagwort(e): Magnetism

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Thema: Physik

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98

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Element-specific analysis of the magnetic anisotropy in Mn-based antiferromagnetic alloys from first principles (2011)

S. Khmelevskyi, A. B. Shick, and P. Mohn

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-28

Beschreibung: Author(s): S. Khmelevskyi, A. B. Shick, and P. Mohn The magnetic anisotropy energy (MAE) and element-specific contributions to the MAE have been studied for Mn-based antiferromagnetic alloys with layered L 1 0 structure within the framework of the local spin-density approximation and the fully relativistic torque method. It is found that the contributi... [Phys. Rev. B 83, 224419] Published Mon Jun 27, 2011

Schlagwort(e): Magnetism

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Thema: Physik

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MOKE experiments and theory of uniform and nonuniform distribution of magnetic nanoscrystals: Mn_{5}Ge_{3} in Ge (2011)

Fabio Ricci, Franco D’Orazio, Alessandra Continenza, Franco Lucari, and Arthur J. Freeman

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-28

Beschreibung: Author(s): Fabio Ricci, Franco D’Orazio, Alessandra Continenza, Franco Lucari, and Arthur J. Freeman We present a theoretical and experimental study of the magneto-optical (MO) Kerr effect (MOKE) on inhomogeneous systems. Starting from ab initio calculated band structures and using the effective medium approximation or the recently proposed alternating composition layers approximation [ Phys. Rev. B... [Phys. Rev. B 83, 224421] Published Mon Jun 27, 2011

Schlagwort(e): Magnetism

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100

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Role of magnetic anisotropy in spin-filter junctions (2011)

R. V. Chopdekar, B. B. Nelson-Cheeseman, M. Liberati, E. Arenholz, and Y. Suzuki

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-29

Beschreibung: Author(s): R. V. Chopdekar, B. B. Nelson-Cheeseman, M. Liberati, E. Arenholz, and Y. Suzuki We have fabricated oxide-based spin-filter junctions in which we demonstrate that magnetic anisotropy can be used to tune the transport behavior of spin-filter junctions. We have demonstrated spin-filtering behavior in La 0.7 Sr 0.3 MnO 3 /CoCr 2 O 4 /Fe 3 O 4 and La 0.7 Sr 0.3 MnO 3 /MnCr 2 O 4 /Fe 3 O 4 junctions where the... [Phys. Rev. B 83, 224426] Published Tue Jun 28, 2011

Schlagwort(e): Magnetism

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Thema: Physik

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