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Majorana corner states in a two-dimensional magnetic topological insulator on a high-temperature superconductor (2018)

Tao Liu, James Jun He, and Franco Nori (野理)

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-14

Beschreibung: Author(s): Tao Liu, James Jun He, and Franco Nori (野理) Conventional n -dimensional topological superconductors (TSCs) have protected gapless ( n − 1 ) -dimensional boundary states. In contrast to this, second-order TSCs are characterized by topologically protected gapless ( n − 2 ) -dimensional states with the usual gapped ( n − 1 ) boundaries. Here, we study a second... [Phys. Rev. B 98, 245413] Published Thu Dec 13, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Frustrated Kondo chains and glassy magnetic phases on the pyrochlore lattice (2018)

Jing Luo and Gia-Wei Chern

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-14

Beschreibung: Author(s): Jing Luo and Gia-Wei Chern We present an extensive numerical study of a type of frustrated itinerant magnetism on the pyrochlore lattice. In this theory, the pyrochlore magnet can be viewed as a cross-linking network of Kondo or double-exchange chains. Contrary to models based on Mott insulators, this itinerant magnetism appr... [Phys. Rev. B 98, 214423] Published Thu Dec 13, 2018

Schlagwort(e): Magnetism

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Assembly of eight spherical magnets into a dotriacontapole configuration (2018)

Stefan Hartung, Felix Sommer, Simeon Völkel, Johannes Schönke, and Ingo Rehberg

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-14

Beschreibung: Author(s): Stefan Hartung, Felix Sommer, Simeon Völkel, Johannes Schönke, and Ingo Rehberg The magnetic field of a cuboidal cluster of eight magnetic spheres is measured. It decays with the inverse seventh power of the distance. This corresponds formally to a multipole named a dotriacontapole. This strong decay is explained on the basis of dipole-dipole interaction and the symmetry of the... [Phys. Rev. B 98, 214424] Published Thu Dec 13, 2018

Schlagwort(e): Magnetism

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Quantum collapse of a magnetic skyrmion (2018)

Amel Derras-Chouk, Eugene M. Chudnovsky, and Dmitry A. Garanin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Amel Derras-Chouk, Eugene M. Chudnovsky, and Dmitry A. Garanin Large thermal fluctuations can destroy skyrmions - tiny speckles of rotated magnetization in two-dimensional films. Yet at low temperatures skyrmions are believed to be topologically stable, which makes them good candidates for data storage and processing. However, as the authors demonstrate here, even at zero temperature a nanoscale skyrmion is not protected against quantum decay. The theory is based on the imaginary-time dynamics of the skyrmion. Due to the fact that even the smallest skyrmion is still formed by many atomic spins, its quantum decay provides an example of a nanoscale Schrödinger’s cat that one can study with modern measuring techniques. [Phys. Rev. B 98, 024423] Published Wed Jul 25, 2018

Schlagwort(e): Magnetism

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High figure of merit magneto-optics from interfacial skyrmions on topological insulators (2018)

Tonmoy K. Bhowmick, Amrit De, and Roger K. Lake

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Tonmoy K. Bhowmick, Amrit De, and Roger K. Lake In the Kerr rotation geometry, magneto-optic memory devices typically suffer from low figure-of-merit (FOM) and long write times. We show that skyrmions formed at the interface of a thin-film multiferroic and a topological insulator can give rise to high FOM magneto-optic Kerr effects (MOKEs). Huge ... [Phys. Rev. B 98, 024424] Published Wed Jul 25, 2018

Schlagwort(e): Magnetism

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Multilayer-by-multilayer surface melting of Cu(200) (2018)

Kai Wang, Haizhen Wu, Mengke Ge, Xingang Hou, Ning Liu, Jia He, Wei Xi, and Jun Luo

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Kai Wang, Haizhen Wu, Mengke Ge, Xingang Hou, Ning Liu, Jia He, Wei Xi, and Jun Luo It is well known that surface melting of metal materials is caused by vacancies, and melting proceeds layer by layer in theoretical predictions. However, the melting process has rarely been directly investigated in real time at atomic resolution. Herein, the (200) surface-melting process of Cu nanop... [Phys. Rev. B 98, 045425] Published Wed Jul 25, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Closed-form expressions for effective constitutive parameters: Electrostrictive and magnetostrictive tensors for bianisotropic metamaterials and their use in optical force density calculations (2018)

Neng Wang, Shubo Wang, Zhao-Qing Zhang, and C. T. Chan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Neng Wang, Shubo Wang, Zhao-Qing Zhang, and C. T. Chan Using a multiple scattering technique, we derived closed-form expressions for effective constitutive parameters and electro/magneto-strictive tensor components for 2D bianisotropic metamaterials. Using the principle of virtual work, we obtained the electromagnetic stress tensor that can be used to c... [Phys. Rev. B 98, 045426] Published Wed Jul 25, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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High magnetocaloric efficiency of a NiFe/NiCu/CoFe/MnIr multilayer in a small magnetic field (2018)

S. N. Vdovichev, N. I. Polushkin, I. D. Rodionov, V. N. Prudnikov, J. Chang, and A. A. Fraerman

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): S. N. Vdovichev, N. I. Polushkin, I. D. Rodionov, V. N. Prudnikov, J. Chang, and A. A. Fraerman The isothermal magnetic entropy changes Δ S (i.e., the magnetocaloric potential) are studied in Ni 80 Fe 20 / Ni 67 C u 33 / Co 90 Fe 10 / Mn 80 Ir 20 stacks at temperatures near the Curie point of the Ni 67 C u 33 spacer by applying magnetic fields of a few milli-Tesla. Such fields were sufficient for toggling magnetic mo... [Phys. Rev. B 98, 014428] Published Thu Jul 26, 2018

Schlagwort(e): Magnetism

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Magnetic field induced phenomena in UIrGe in fields applied along the $b$ axis (2018)

Jiří Pospíšil, Yoshinori Haga, Yoshimitsu Kohama, Atsushi Miyake, Shinsaku Kambe, Naoyuki Tateiwa, Michal Vališka, Petr Proschek, Jan Prokleška, Vladimír Sechovský, Masashi Tokunaga, Koichi Kindo, Akira Matsuo, and Etsuji Yamamoto

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): Jiří Pospíšil, Yoshinori Haga, Yoshimitsu Kohama, Atsushi Miyake, Shinsaku Kambe, Naoyuki Tateiwa, Michal Vališka, Petr Proschek, Jan Prokleška, Vladimír Sechovský, Masashi Tokunaga, Koichi Kindo, Akira Matsuo, and Etsuji Yamamoto The metamagnetic transition between the antiferromagnetic and paramagnetic state in UIrGe has been studied at various temperatures by magnetization, heat capacity, and magnetocaloric-effect measurements on a single crystal in static and pulsed magnetic fields applied along the orthorhombic b axis. A... [Phys. Rev. B 98, 014430] Published Thu Jul 26, 2018

Schlagwort(e): Magnetism

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Effect of uniaxial stress on the magnetic phases of ${\mathrm{CeAuSb}}_{2}$ (2018)

Joonbum Park, Hideaki Sakai, Andrew P. Mackenzie, and Clifford W. Hicks

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): Joonbum Park, Hideaki Sakai, Andrew P. Mackenzie, and Clifford W. Hicks We present results of measurements of resistivity of CeAuSb 2 under the combination of c -axis magnetic field and in-plane uniaxial stress. In unstressed CeAuSb 2 there are two magnetic phases. The low-field A phase is a single-component spin-density wave (SDW), with q = ( η , ± η , 1 / 2 ) , and the high-field B ... [Phys. Rev. B 98, 024426] Published Thu Jul 26, 2018

Schlagwort(e): Magnetism

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Engineering quantum spin liquids and many-body Majorana states with a driven superconducting box circuit (2018)

Fan Yang, Loïc Henriet, Ariane Soret, and Karyn Le Hur

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): Fan Yang, Loïc Henriet, Ariane Soret, and Karyn Le Hur We design a driven superconducting box with four spins S = 1 / 2 (qubits) such that coupled devices can give insight on the occurrence of quantum spin liquids and many-body Majorana states. Within one box or island, we introduce a generalized nuclear magnetic resonance algorithm to realize our models an... [Phys. Rev. B 98, 035431] Published Thu Jul 26, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Fingerprints of Berry phases in the bulk exciton spectrum of a topological insulator (2018)

Andrew A. Allocca, Dmitry K. Efimkin, and Victor M. Galitski

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): Andrew A. Allocca, Dmitry K. Efimkin, and Victor M. Galitski We examine excitons formed in the bulk of a topological insulator as the system is tuned via a parameter between topological and trivial insulating phases, arguing that nontrivial topology has fingerprints in the spectrum of these excitons. The closely related hydrogen atom problem is well known to ... [Phys. Rev. B 98, 045430] Published Fri Jul 27, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Structural, vibrational, and electronic properties of single-layer hexagonal crystals of group IV and V elements (2018)

Burak Özdamar, Gözde Özbal, M. Neşet Çınar, Koray Sevim, Gizem Kurt, Birnur Kaya, and Hâldun Sevinçli

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): Burak Özdamar, Gözde Özbal, M. Neşet Çınar, Koray Sevim, Gizem Kurt, Birnur Kaya, and Hâldun Sevinçli Using first-principles density functional theory calculations, we investigate a family of stable two-dimensional crystals with chemical formula A 2 B 2 , where A and B belong to groups IV and V, respectively ( A = C , Si, Ge, Sn, Pb; B = N , P, As, Sb, Bi). Two structural symmetries of hexagonal lattices P 6 ¯ m 2 ... [Phys. Rev. B 98, 045431] Published Fri Jul 27, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Phase transitions of a two-dimensional deformed Affleck-Kennedy-Lieb-Tasaki model (2018)

Nicholas Pomata, Ching-Yu Huang, and Tzu-Chieh Wei

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): Nicholas Pomata, Ching-Yu Huang, and Tzu-Chieh Wei We study spin-2 deformed-AKLT models on the square lattice, specifically a two-parameter family of O ( 2 ) -symmetric ground-state wave functions as defined by Niggemann, Klümper, and Zittartz, who found previously that the phase diagram consists of a Néel-ordered phase and a disordered phase which cont... [Phys. Rev. B 98, 014432] Published Fri Jul 27, 2018

Schlagwort(e): Magnetism

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Twisted skyrmions at domain boundaries and the method of image skyrmions (2018)

Huanhuan Yang, C. Wang, Xiaofan Wang, X. S. Wang, Yunshan Cao, and Peng Yan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): Huanhuan Yang, C. Wang, Xiaofan Wang, X. S. Wang, Yunshan Cao, and Peng Yan We predict a twisted skyrmion structure at the boundary of two antiparallel magnetic domains stabilized by a (synthetic or crystal) antiferromagnetic coupling on the border. Through this novel state, skyrmions with opposite polarities can be freely switched between each other by spin-polarized elect... [Phys. Rev. B 98, 014433] Published Fri Jul 27, 2018

Schlagwort(e): Magnetism

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Ferromagnetic resonance in core-shell nanoparticles with multitype exchange anisotropy (2018)

I. S. Poperechny and Yu. L. Raikher

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-31

Beschreibung: Author(s): I. S. Poperechny and Yu. L. Raikher A phenomenological model for magnetodynamics of core-shell nanoparticles is presented. The term core-shell implies, prima facie , that the spin structures (phases) of the particle components are different, no matter whether or not they are chemically identical. The model takes in two main assumptions... [Phys. Rev. B 98, 014434] Published Mon Jul 30, 2018

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Phase transitions on a ladder of braided non-Abelian anyons (2018)

Babatunde M. Ayeni, Robert N. C. Pfeifer, and Gavin K. Brennen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-31

Beschreibung: Author(s): Babatunde M. Ayeni, Robert N. C. Pfeifer, and Gavin K. Brennen Non-Abelian anyons can exist as pointlike particles in two-dimensional systems and have particle exchange statistics which are neither bosonic nor fermionic. Like in spin systems, the role of fusion (Heisenberg-like) interactions between anyons has been well studied. However, unlike our understandin... [Phys. Rev. B 98, 045432] Published Mon Jul 30, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Magnetic reversal in $\mathrm{S}{\mathrm{r}}_{4}\mathrm{R}{\mathrm{u}}_{3}{\mathrm{O}}_{10}$ nanosheets probed by anisotropic magnetoresistance (2018)

Yan Liu, Weiwei Chu, Jiyong Yang, Guoqiang Liu, Haifeng Du, Wei Ning, Langsheng Ling, Wei Tong, Zhe Qu, Gang Cao, Zhuan Xu, and Mingliang Tian

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Yan Liu, Weiwei Chu, Jiyong Yang, Guoqiang Liu, Haifeng Du, Wei Ning, Langsheng Ling, Wei Tong, Zhe Qu, Gang Cao, Zhuan Xu, and Mingliang Tian The origin of the unusual second magnetic transition at a temperature T M in the ruthenate S r 4 R u 3 O 10 remains elusive. Here, we have investigated the thickness-dependent anisotropic magnetoresistance of S r 4 R u 3 O 10 nanosheets, and clearly found that the sign of the magnetoresistance (MR) presents an unu... [Phys. Rev. B 98, 024425] Published Wed Jul 25, 2018

Schlagwort(e): Magnetism

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Chiral skyrmions in an anisotropy gradient (2018)

R. Tomasello, S. Komineas, G. Siracusano, M. Carpentieri, and G. Finocchio

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): R. Tomasello, S. Komineas, G. Siracusano, M. Carpentieri, and G. Finocchio A strategy to drive skyrmion motion by a combination of an anisotropy gradient and spin-Hall effect has recently been demonstrated. Here, we study the fundamental properties of this type of motion by combining micromagnetic simulations and a generalized Thiele's equation. We find that the anisotropy... [Phys. Rev. B 98, 024421] Published Tue Jul 24, 2018

Schlagwort(e): Magnetism

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Domain formation in rectangular magnetic nanoparticle assemblies (2018)

Alexander Fabian, Michael Czerner, Christian Heiliger, Matthias T. Elm, Detlev M. Hofmann, and Peter J. Klar

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-02

Beschreibung: Author(s): Alexander Fabian, Michael Czerner, Christian Heiliger, Matthias T. Elm, Detlev M. Hofmann, and Peter J. Klar Rectangular assemblies with different aspect ratios were prepared with spherical magnetite nanoparticles (diameter d = 20 nm ) on lithographically patterned substrates using a variant of the meniscus force deposition method. The aspect ratio (width:length) of the rectangular assemblies was varied from v... [Phys. Rev. B 98, 054401] Published Wed Aug 01, 2018

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Detecting end states of topological quantum paramagnets via spin Hall noise spectroscopy (2018)

Darshan G. Joshi, Andreas P. Schnyder, and So Takei

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-02

Beschreibung: Author(s): Darshan G. Joshi, Andreas P. Schnyder, and So Takei We theoretically study the equilibrium spin current fluctuations and the corresponding charge noise generated by the inverse spin Hall effect (ISHE) in a metal with strong spin-orbit coupling deposited on top of a quantum paramagnet. It is shown that the charge noise power spectra measured along dif... [Phys. Rev. B 98, 064401] Published Wed Aug 01, 2018

Schlagwort(e): Magnetism

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Nanoscale magnetic localization in exchange strength modulated ferromagnets (2018)

B. J. Kirby, L. Fallarino, P. Riego, B. B. Maranville, Casey W. Miller, and A. Berger

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-04

Beschreibung: Author(s): B. J. Kirby, L. Fallarino, P. Riego, B. B. Maranville, Casey W. Miller, and A. Berger Although ferromagnetism is in general a long-range collective phenomenon, it is possible to induce local spatial variations of magnetic properties in ferromagnetic materials. For example, systematic variation of the exchange coupling strength can be used to create systems that behave as if they are ... [Phys. Rev. B 98, 064404] Published Fri Aug 03, 2018

Schlagwort(e): Magnetism

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Homogeneous and heterogeneous nucleation of skyrmions in thin layers of cubic helimagnets (2018)

A. O. Leonov and K. Inoue

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): A. O. Leonov and K. Inoue Formation of isolated chiral skyrmions by homogeneous and heterogeneous nucleation has been studied in thin layers of cubic helimagnets via elongation of torons and chiral bobbers, respectively. Both torons and bobbers are localized in three dimensions, contain singularities, and, according to the t... [Phys. Rev. B 98, 054404] Published Mon Aug 06, 2018

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Spin-wave dynamics in artificial anti-spin-ice systems: Experimental and theoretical investigations (2018)

S. Mamica, X. Zhou, A. Adeyeye, M. Krawczyk, and G. Gubbiotti

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): S. Mamica, X. Zhou, A. Adeyeye, M. Krawczyk, and G. Gubbiotti Reversed structures of artificial spin-ice systems, where elongated holes with elliptical shape (antidots) are arranged into a square array with two orthogonal sublattices, are referred to as antisquared spin ice. Using Brillouin light-scattering spectroscopy and plane-wave-method calculations, we i... [Phys. Rev. B 98, 054405] Published Mon Aug 06, 2018

Schlagwort(e): Magnetism

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Metamagnetism and zero-scale-factor universality in the two-dimensional $J\text{−}Q$ model (2018)

Adam Iaizzi, Kedar Damle, and Anders W. Sandvik

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Adam Iaizzi, Kedar Damle, and Anders W. Sandvik Using a combination of quantum Monte Carlo and exact methods, we study the field-driven saturation transition of the two-dimensional J − Q model, in which the antiferromagnetic Heisenberg exchange ( J ) coupling competes with an additional four-spin interaction ( Q ) that favors valence-bond solid order. ... [Phys. Rev. B 98, 064405] Published Mon Aug 06, 2018

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Observation of spontaneous ferriquadrupolar order in $\mathrm{KDy}{({\mathrm{MoO}}_{4})}_{2}$ (2018)

A. A. Zvyagin, K. Kutko, D. Kamenskyi, A. V. Peschanskii, S. Poperezhai, and N. M. Nesterenko

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): A. A. Zvyagin, K. Kutko, D. Kamenskyi, A. V. Peschanskii, S. Poperezhai, and N. M. Nesterenko Using Raman and infrared spectroscopies, spontaneous ferriquadrupolar ordering has been observed in the rare-earth-based system KDy ( MoO 4 ) 2 . Ordered quadrupoles in the electron subsystem attend nonequivalent distortions of rare-earth ions in the ordered phase. A mean-field theory explaining the onset... [Phys. Rev. B 98, 064406] Published Mon Aug 06, 2018

Schlagwort(e): Magnetism

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Noncollinear magnetism in nanosized cobalt chromite (2018)

D. Zákutná, J. Vlček, P. Fitl, K. Nemkovski, D. Honecker, D. Nižňanský, and S. Disch

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): D. Zákutná, J. Vlček, P. Fitl, K. Nemkovski, D. Honecker, D. Nižňanský, and S. Disch Using a combination of neutron diffraction with XYZ polarization analysis and magnetization measurements, the noncollinear magnetism in nanosized cobalt chromite, a potential multiferroic material, is revealed. For noninteracting 26.9(1) nm nanoparticles, a bulklike behavior is identified, including... [Phys. Rev. B 98, 064407] Published Mon Aug 06, 2018

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Orbital magnetic quadrupole moment and nonlinear anomalous thermoelectric transport (2018)

Yang Gao and Di Xiao

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Yang Gao and Di Xiao We present a microscopic theory of the orbital magnetic quadrupole moment density Q i j in periodic crystals with combined time-reversal ( T ) and inversion ( I ) symmetry. We obtain a gauge-invariant expression with a clear physical interpretation and demonstrate the typical behavior of Q i j in a minimal ... [Phys. Rev. B 98, 060402(R)] Published Mon Aug 06, 2018

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Andreev transport through single-molecule magnets (2018)

F. Pawlicki and I. Weymann

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): F. Pawlicki and I. Weymann The Andreev transport through a large-spin magnetic molecule, such as a single molecular magnet, attached to superconducting and ferromagnetic leads is studied theoretically by means of the real-time diagrammatic technique. It is shown that due to the proximity effect, molecular Andreev bound states... [Phys. Rev. B 98, 085411] Published Tue Aug 07, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Two-phonon Raman bands of single-walled carbon nanotubes: A case study (2018)

Valentin N. Popov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): Valentin N. Popov It has been long accepted that the second-order Raman bands in carbon nanotubes are enhanced through the double-resonance mechanism. Although separate aspects of this mechanism have been studied for a few second-order Raman bands, including the most intense defect-induced D band and the two-phonon 2... [Phys. Rev. B 98, 085413] Published Tue Aug 07, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Shubnikov–de Haas oscillations in the anomalous Hall conductivity of Chern insulators (2018)

Luis M. Canonico, Jose H. García, Tatiana G. Rappoport, Aires Ferreira, and R. B. Muniz

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Luis M. Canonico, Jose H. García, Tatiana G. Rappoport, Aires Ferreira, and R. B. Muniz The Haldane model on a honeycomb lattice is a paradigmatic example of a system featuring quantized Hall conductivity in the absence of an external magnetic field, that is, a quantum anomalous Hall effect. Recent theoretical work predicted that the anomalous Hall conductivity of massive Dirac fermion... [Phys. Rev. B 98, 085409] Published Mon Aug 06, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Second harmonic generation in the plasmon-polariton gap of quasiperiodic metamaterial photonic superlattices (2018)

F. Reyes Gómez, N. Porras-Montenegro, Osvaldo N. Oliveira, Jr., and J. R. Mejía-Salazar

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): F. Reyes Gómez, N. Porras-Montenegro, Osvaldo N. Oliveira, Jr., and J. R. Mejía-Salazar Self-similar bulk plasmon-polariton modes in quasiperiodic photonic superlattices were used here for a giant enhancement of second harmonic generation. Results for Fibonacci and Thue-Morse-like superlattices indicate that not only the disorder but also the symmetry of the unit cell plays a crucial r... [Phys. Rev. B 98, 075406] Published Tue Aug 07, 2018

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Polarization-controlled coherent phonon generation in acoustoplasmonic metasurfaces (2018)

Norberto D. Lanzillotti-Kimura, Kevin P. O’Brien, Junsuk Rho, Haim Suchowski, Xiaobo Yin, and Xiang Zhang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-05

Beschreibung: Author(s): Norberto D. Lanzillotti-Kimura, Kevin P. O’Brien, Junsuk Rho, Haim Suchowski, Xiaobo Yin, and Xiang Zhang Acoustic vibrations at the nanoscale (GHz-THz frequencies) and their interactions with electrons, photons, and other excitations are the heart of an emerging field in physics: nanophononics. The design of ultrahigh frequency acoustic-phonon transducers, with tunable frequency, and easy to integrate ... [Phys. Rev. B 97, 235403] Published Mon Jun 04, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Magnetic anisotropy in permalloy: Hidden quantum mechanical features (2018)

Debora C. M. Rodrigues, Angela B. Klautau, Alexander Edström, Jan Rusz, Lars Nordström, Manuel Pereiro, Björgvin Hjörvarsson, and Olle Eriksson

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-05

Beschreibung: Author(s): Debora C. M. Rodrigues, Angela B. Klautau, Alexander Edström, Jan Rusz, Lars Nordström, Manuel Pereiro, Björgvin Hjörvarsson, and Olle Eriksson By means of relativistic, first principles calculations, we investigate the microscopic origin of the vanishingly low magnetic anisotropy of Permalloy, here proposed to be intrinsically related to the local symmetries of the alloy. It is shown that the local magnetic anisotropy of individual atoms i... [Phys. Rev. B 97, 224402] Published Mon Jun 04, 2018

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Intrinsic and anisotropic Rashba spin splitting in Janus transition-metal dichalcogenide monolayers (2018)

Tao Hu, Fanhao Jia, Guodong Zhao, Jiongyao Wu, Alessandro Stroppa, and Wei Ren

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Tao Hu, Fanhao Jia, Guodong Zhao, Jiongyao Wu, Alessandro Stroppa, and Wei Ren Transition-metal dichalcogenides (TMDs) monolayers have been considered as important two-dimensional semiconductor materials for the study of fundamental physics in the field of spintronics. However, the out-of-plane mirror symmetry in TMDs may constrain electrons' degrees of freedom and it may limi... [Phys. Rev. B 97, 235404] Published Mon Jun 04, 2018

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Interface-induced spin-orbit interaction in silicon quantum dots and prospects for scalability (2018)

Rifat Ferdous, Kok W. Chan, Menno Veldhorst, J. C. C. Hwang, C. H. Yang, Harshad Sahasrabudhe, Gerhard Klimeck, Andrea Morello, Andrew S. Dzurak, and Rajib Rahman

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Rifat Ferdous, Kok W. Chan, Menno Veldhorst, J. C. C. Hwang, C. H. Yang, Harshad Sahasrabudhe, Gerhard Klimeck, Andrea Morello, Andrew S. Dzurak, and Rajib Rahman We identify the presence of monatomic steps at the Si/SiGe or Si / SiO 2 interface as a dominant source of variations in the dephasing time of silicon (Si) quantum dot (QD) spin qubits. First, using atomistic tight-binding calculations we show that the g -factors and their Stark shifts undergo variation... [Phys. Rev. B 97, 241401(R)] Published Mon Jun 04, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Strong and weak second-order topological insulators with hexagonal symmetry and ℤ${}_{3}$ index (2018)

Motohiko Ezawa

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-05

Beschreibung: Author(s): Motohiko Ezawa We propose second-order topological insulators (SOTIs) whose lattice structure has a hexagonal symmetry C 6 . We start with a three-dimensional weak topological insulator constructed on a stacked triangular lattice, which has only side topological surface states. We then introduce an additional mass t... [Phys. Rev. B 97, 241402(R)] Published Mon Jun 04, 2018

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Intrinsic hysteresis due to the surface barrier for chiral solitons in monoaxial chiral helimagnets (2018)

M. Shinozaki, Y. Masaki, R. Aoki, Y. Togawa, and Y. Kato

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-14

Beschreibung: Author(s): M. Shinozaki, Y. Masaki, R. Aoki, Y. Togawa, and Y. Kato Chiral solitons in monoaxial chiral magnets undergo a surface barrier, which is analogous to the Bean-Livingston barrier in type-II superconductors. The authors argue here that the surface barrier is the main mechanism for large hysteresis observed in magnetoresistance (MR) measurements on micrometer-sized samples of CrNb 3 S 6 . In the MR hysteresis, a conspicuous jump is observed at the field H b for decreasing fields. Experimental results for H b ∼ 0 . 4 H c (with thermodynamic critical field H c ) and the theoretical result H b / H c = 4 / π 2 are in good agreement with each other. The surface barrier is regarded as a common property of systems (superconductors, chiral magnets, and chiral liquid crystals) that exhibit continuous transitions of the nucleation type. [Phys. Rev. B 97, 214413] Published Wed Jun 13, 2018

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Calculating the transport properties of magnetic materials from first principles including thermal and alloy disorder, noncollinearity, and spin-orbit coupling (2018)

Anton A. Starikov, Yi Liu, Zhe Yuan, and Paul J. Kelly

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-14

Beschreibung: Author(s): Anton A. Starikov, Yi Liu, Zhe Yuan, and Paul J. Kelly A density functional theory based two-terminal scattering formalism that includes spin-orbit coupling and spin noncollinearity is described. An implementation using tight-binding muffin-tin orbitals combined with extensive use of sparse matrix techniques allows a wide variety of inhomogeneous struct... [Phys. Rev. B 97, 214415] Published Wed Jun 13, 2018

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Field dependence of nonreciprocal magnons in chiral MnSi (2018)

T. Weber, J. Waizner, G. S. Tucker, R. Georgii, M. Kugler, A. Bauer, C. Pfleiderer, M. Garst, and P. Böni

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): T. Weber, J. Waizner, G. S. Tucker, R. Georgii, M. Kugler, A. Bauer, C. Pfleiderer, M. Garst, and P. Böni Spin waves in chiral magnetic materials are strongly influenced by the Dzyaloshinskii-Moriya interaction, resulting in intriguing phenomena like nonreciprocal magnon propagation and magnetochiral dichroism. Here, we study the nonreciprocal magnon spectrum of the archetypical chiral magnet MnSi and i... [Phys. Rev. B 97, 224403] Published Tue Jun 05, 2018

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Nonswitchable polarization and magnetoelectric coupling in the high-pressure synthesized doubly ordered perovskites $\mathrm{NaYMnW}{\mathrm{O}}_{6}$ and $\mathrm{NaHoCoW}{\mathrm{O}}_{6}$ (2018)

Chandan De and A. Sundaresan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-15

Beschreibung: Author(s): Chandan De and A. Sundaresan The doubly ordered perovskites Na L n MnW O 6 ( L n = La , Nd, and Tb), Na L n FeW O 6 ( L n = La and Nd), and Na L n CoW O 6 ( L n = Sm − Er , Yb, and Y) have been reported to be potential multiferroics because of their polar crystal structure ( P 2 1 ) and antiferromagnetic ordering of the transition-metal ions at low temperatures.... [Phys. Rev. B 97, 214418] Published Thu Jun 14, 2018

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Electric and magnetic gating of Rashba-active weak links (2018)

A. Aharony, O. Entin-Wohlman, M. Jonson, and R. I. Shekhter

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-16

Beschreibung: Author(s): A. Aharony, O. Entin-Wohlman, M. Jonson, and R. I. Shekhter In a one-dimensional weak-link wire the spin-orbit interaction (SOI) alone cannot generate a nonzero spin current. We show that a Zeeman field acting in the wire in conjunction with the Rashba SOI there does yield such a current, whose magnitude and direction depend on the direction of the field. Wh... [Phys. Rev. B 97, 220404(R)] Published Fri Jun 15, 2018

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Magnetism and the phase diagram of ${\mathrm{MnSb}}_{2}{\mathrm{O}}_{6}$ (2018)

C. Koo, J. Werner, M. Tzschoppe, M. Abdel-Hafiez, P. K. Biswas, R. Sarkar, H.-H. Klauss, G. V. Raganyan, E. A. Ovchenkov, A. Yu. Nikulin, A. N. Vasiliev, E. A. Zvereva, and R. Klingeler

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-16

Beschreibung: Author(s): C. Koo, J. Werner, M. Tzschoppe, M. Abdel-Hafiez, P. K. Biswas, R. Sarkar, H.-H. Klauss, G. V. Raganyan, E. A. Ovchenkov, A. Yu. Nikulin, A. N. Vasiliev, E. A. Zvereva, and R. Klingeler Static and dynamic magnetic properties of P 3 ¯ 1 m -phase MnSb 2 O 6 have been studied by means of muon-spin relaxation ( μ SR ), high-frequency electron-spin resonance (HF-ESR), specific heat, and magnetization studies in magnetic fields up to 25 T. The data imply onset of long-range antiferromagnetic order ... [Phys. Rev. B 97, 224416] Published Fri Jun 15, 2018

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Berry curvature in monolayer ${\mathrm{MoS}}_{2}$ with broken mirror symmetry (2018)

Kyung-Han Kim and Hyun-Woo Lee

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-16

Beschreibung: Author(s): Kyung-Han Kim and Hyun-Woo Lee An ideal 1 H phase monolayer MoS 2 has mirror reflection symmetry, but this symmetry is broken in common experimental situations, where the monolayer is placed on a substrate. By using k · p perturbation theory, we investigate the effect of mirror symmetry breaking on the Berry curvature of the material... [Phys. Rev. B 97, 235423] Published Fri Jun 15, 2018

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Scaling of nonlinear susceptibilities in an artificial permalloy honeycomb lattice (2018)

A. Dahal, Y. Chen, B. Summers, and D. K. Singh

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-19

Beschreibung: Author(s): A. Dahal, Y. Chen, B. Summers, and D. K. Singh Two-dimensional artificial magnetic honeycomb lattice is predicted to manifest several magnetic phase transitions as a function of reducing temperature. We have performed the analysis of nonlinear susceptibility to explore the equilibrium nature of phase transition in artificial honeycomb lattice of... [Phys. Rev. B 97, 214420] Published Mon Jun 18, 2018

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Spontaneous distortion via the appearance of ferromagnetism in Pd ultrathin films: Observation of an inverse mechanism for the Stoner criterion (2018)

Shunsuke Sakuragi, Hiroo Tajiri, Hiroyuki Kageshima, and Tetsuya Sato

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-19

Beschreibung: Author(s): Shunsuke Sakuragi, Hiroo Tajiri, Hiroyuki Kageshima, and Tetsuya Sato We study the crystal structure of Pd(100) ultrathin films, which show ferromagnetism induced by the quantum confinement effect, using in situ x-ray crystal truncation rod measurement and density functional calculation. The energy gain from the appearance of ferromagnetism in Pd results in flatter an... [Phys. Rev. B 97, 214421] Published Mon Jun 18, 2018

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Strong anomalous Nernst effect in collinear magnetic Weyl semimetals without net magnetic moments (2018)

Jonathan Noky, Jacob Gayles, Claudia Felser, and Yan Sun

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-19

Beschreibung: Author(s): Jonathan Noky, Jacob Gayles, Claudia Felser, and Yan Sun We predict a large anomalous Nernst effect in the inverse Heusler compensated ferrimagnets Ti 2 Mn X ( X = Al , Ga, and In) with vanishing net magnetic moments. Though the net magnetic moment is zero, the Weyl points in these systems lead to a large anomalous Nernst conductivity (ANC) due to the lack of a ... [Phys. Rev. B 97, 220405(R)] Published Mon Jun 18, 2018

Schlagwort(e): Magnetism

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Spin glass in the bond-diluted ${J}_{1}−{J}_{2}$ Ising model on the square lattice (2018)

Yining Xu and Dao-Xin Yao

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-19

Beschreibung: Author(s): Yining Xu and Dao-Xin Yao We use Monte Carlo (MC) methods to simulate a two-dimensional (2D) bond-diluted Ising model on the square lattice, which has frustration between nearest-neighbor interaction J 1 and next-nearest-neighbor interaction J 2 . In this study, we use the parallel tempering algorithm to study thermodynamics fo... [Phys. Rev. B 97, 224419] Published Mon Jun 18, 2018

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Finite-barrier correction for the ferromagnetic resonance frequency of nanomagnets with various magnetocrystalline anisotropies (2018)

Yuri P. Kalmykov, Serguey V. Titov, William T. Coffey, and William J. Dowling

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-19

Beschreibung: Author(s): Yuri P. Kalmykov, Serguey V. Titov, William T. Coffey, and William J. Dowling Finite-barrier corrections to the ferromagnetic resonance (FMR) frequency of nanomagnets are obtained in closed integral form from the undamped deterministic equation of motion of the magnetization by averaging the precession frequency as expressed by elliptic functions over all possible precessiona... [Phys. Rev. B 97, 224418] Published Mon Jun 18, 2018

Schlagwort(e): Magnetism

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Coupling of magnetic order and charge transport in the candidate Dirac semimetal ${\mathrm{EuCd}}_{2}{\mathrm{As}}_{2}$ (2018)

M. C. Rahn, J.-R. Soh, S. Francoual, L. S. I. Veiga, J. Strempfer, J. Mardegan, D. Y. Yan, Y. F. Guo, Y. G. Shi, and A. T. Boothroyd

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-21

Beschreibung: Author(s): M. C. Rahn, J.-R. Soh, S. Francoual, L. S. I. Veiga, J. Strempfer, J. Mardegan, D. Y. Yan, Y. F. Guo, Y. G. Shi, and A. T. Boothroyd We use resonant elastic x-ray scattering to determine the evolution of magnetic order in EuCd 2 As 2 below T N = 9.5 K, as a function of temperature and applied magnetic field. We find an A -type antiferromagnetic structure with in-plane magnetic moments, and observe dramatic magnetoresistive effects assoc... [Phys. Rev. B 97, 214422] Published Wed Jun 20, 2018

Schlagwort(e): Magnetism

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Exciton-polarons in doped semiconductors in a strong magnetic field (2018)

Dmitry K. Efimkin and Allan H. Mac; Donald

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-22

Beschreibung: Author(s): Dmitry K. Efimkin and Allan H. MacDonald In previous work, we have argued that the optical properties of moderately doped two-dimensional semiconductors can be described in terms of excitons dressed by their interactions with a degenerate Fermi sea of additional charge carriers. These interactions split the bare exciton into attractive and... [Phys. Rev. B 97, 235432] Published Thu Jun 21, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Atomic visualization of copper oxide structure in the infinite-layer cuprate $\mathrm{SrCu}{\mathrm{O}}_{2}$ (2018)

Yong Zhong, Sha Han, Yang Wang, Zhiling Luo, Ding Zhang, Lili Wang, Wei Li, Ke He, Can-Li Song, Xu-Cun Ma, and Qi-Kun Xue

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-23

Beschreibung: Author(s): Yong Zhong, Sha Han, Yang Wang, Zhiling Luo, Ding Zhang, Lili Wang, Wei Li, Ke He, Can-Li Song, Xu-Cun Ma, and Qi-Kun Xue We report the atomic-scale structure of epitaxial films of the parent infinite-layer compound SrCu O 2 prepared on SrTiO 3 by molecular beam epitaxy. In situ scanning tunneling microscopy study reveals a stoichiometric copper oxide ( CuO 2 ) -terminated surface featured by 2 × 2 reconstruction, caused prima... [Phys. Rev. B 97, 245420] Published Fri Jun 22, 2018

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Temperature-dependent terahertz spectroscopy of inverted-band three-layer InAs/GaSb/InAs quantum well (2018)

S. S. Krishtopenko, S. Ruffenach, F. Gonzalez-Posada, G. Boissier, M. Marcinkiewicz, M. A. Fadeev, A. M. Kadykov, V. V. Rumyantsev, S. V. Morozov, V. I. Gavrilenko, C. Consejo, W. Desrat, B. Jouault, W. Knap, E. Tournié, and F. Teppe

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-23

Beschreibung: Author(s): S. S. Krishtopenko, S. Ruffenach, F. Gonzalez-Posada, G. Boissier, M. Marcinkiewicz, M. A. Fadeev, A. M. Kadykov, V. V. Rumyantsev, S. V. Morozov, V. I. Gavrilenko, C. Consejo, W. Desrat, B. Jouault, W. Knap, E. Tournié, and F. Teppe We report on temperature-dependent terahertz spectroscopy of a three-layer InAs/GaSb/InAs quantum well (QW) with inverted-band structure. The interband optical transitions, measured up to 16 T at different temperatures by Landau-level magnetospectroscopy, demonstrate the inverted-band structure of t... [Phys. Rev. B 97, 245419] Published Fri Jun 22, 2018

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Molecular dynamics studies of ion beam implantation and patterning of silicon: Effect of noble gas cluster formation (2018)

Michael A. Lively, Samuel X. Bennett, and Jean Paul Allain

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-27

Beschreibung: Author(s): Michael A. Lively, Samuel X. Bennett, and Jean Paul Allain The use of energetic ion beams to induce nanopattern formation at surfaces has been well studied both experimentally and theoretically. However, the influence on morphological evolution of the implanted species themselves remains little understood, particularly in the case when the incident ion spec... [Phys. Rev. B 97, 235443] Published Tue Jun 26, 2018

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Magnetoplasmonic enhancement of Faraday rotation in patterned graphene metasurfaces (2018)

Michele Tamagnone, Tetiana M. Slipchenko, Clara Moldovan, Peter Q. Liu, Alba Centeno, Hamed Hasani, Amaia Zurutuza, Adrian M. Ionescu, Luis Martin-Moreno, Jérôme Faist, Juan R. Mosig, Alexey B. Kuzmenko, and Jean-Marie Poumirol

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-27

Beschreibung: Author(s): Michele Tamagnone, Tetiana M. Slipchenko, Clara Moldovan, Peter Q. Liu, Alba Centeno, Hamed Hasani, Amaia Zurutuza, Adrian M. Ionescu, Luis Martin-Moreno, Jérôme Faist, Juan R. Mosig, Alexey B. Kuzmenko, and Jean-Marie Poumirol Faraday rotation is a fundamental property present in all nonreciprocal optical elements. In the THz range, graphene displays strong Faraday rotation; unfortunately, it is limited to frequencies below the cyclotron resonance. Here, we show experimentally that in specifically designed metasurfaces, m... [Phys. Rev. B 97, 241410(R)] Published Tue Jun 26, 2018

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Magnetic inhomogeneity in the copper pseudochalcogenide CuNCN (2018)

A. Zorko, P. Jeglič, M. Pregelj, D. Arčon, H. Luetkens, A. L. Tchougréeff, and R. Dronskowski

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-28

Beschreibung: Author(s): A. Zorko, P. Jeglič, M. Pregelj, D. Arčon, H. Luetkens, A. L. Tchougréeff, and R. Dronskowski Copper carbodiimide, CuNCN, is a geometrically frustrated nitrogen-based analog of cupric oxide, whose magnetism remains ambiguous. Here, we employ a combination of local-probe techniques, including Cu 63 , 65 nuclear quadrupole resonance, C 13 nuclear magnetic resonance, and muon spin rotation to show ... [Phys. Rev. B 97, 214432] Published Wed Jun 27, 2018

Schlagwort(e): Magnetism

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Band-edge levels of the NaCl(100) surface: Self-consistent hybrid density functional theory compared to many-body perturbation theory (2018)

Manuel Hochheim and Thomas Bredow

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-28

Beschreibung: Author(s): Manuel Hochheim and Thomas Bredow The electronic gap of bulk NaCl and the band-edge levels of the NaCl(100) surface are calculated using GW methods and self-consistent dielectric dependent hybrid functionals. Optical spectra are calculated by solving the Bethe-Salpeter equations (GW-BSE). For the calculation of the electronic struct... [Phys. Rev. B 97, 235447] Published Wed Jun 27, 2018

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Interplay of the Kondo effect with the induced pairing in electronic and caloric properties of T-shaped double quantum dots (2018)

Krzysztof P. Wójcik and Ireneusz Weymann

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-28

Beschreibung: Author(s): Krzysztof P. Wójcik and Ireneusz Weymann We examine the influence of the superconducting proximity effect on the transport properties of a T-shaped double quantum dot strongly coupled to two normal, nonmagnetic or ferromagnetic leads. We show that the two-stage Kondo screening may be suppressed or enhanced by the presence of pairing correl... [Phys. Rev. B 97, 235449] Published Wed Jun 27, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Measurement of the Casimir force in a gas and in a liquid (2018)

Anne Le Cunuder, Artyom Petrosyan, George Palasantzas, Vitaly Svetovoy, and Sergio Ciliberto

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-11-29

Beschreibung: Author(s): Anne Le Cunuder, Artyom Petrosyan, George Palasantzas, Vitaly Svetovoy, and Sergio Ciliberto We present detailed measurements of the Casimir-Lifshitz force between two gold surfaces, performed in both gas (nitrogen) and liquid (ethanol) environments with the same apparatus and on the same spot of the sample. Furthermore, we study the role of double-layer forces in the liquid, and we show th... [Phys. Rev. B 98, 201408(R)] Published Wed Nov 28, 2018

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Screening cloud and non-Fermi-liquid scattering in topological Kondo devices (2018)

A. Latief and B. Béri

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-11-29

Beschreibung: Author(s): A. Latief and B. Béri The topological Kondo effect arises when conduction electrons in metallic leads are coupled to a mesoscopic superconducting island with Majorana fermions. Working with its minimal setup, we study the lead electron local tunneling density of states in its thermally smeared form motivated by scanning ... [Phys. Rev. B 98, 205427] Published Wed Nov 28, 2018

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Impact of interface structure on magnetic exchange coupling in $\mathrm{MnBi}/{\mathrm{Fe}}_{x}{\mathrm{Co}}_{1−x}$ bilayers (2018)

S. Sabet, A. Moradabadi, S. Gorji, M. Yi, Q. Gong, M. H. Fawey, E. Hildebrandt, D. Wang, H. Zhang, B.-X. Xu, C. Kübel, and L. Alff

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-11-30

Beschreibung: Author(s): S. Sabet, A. Moradabadi, S. Gorji, M. Yi, Q. Gong, M. H. Fawey, E. Hildebrandt, D. Wang, H. Zhang, B.-X. Xu, C. Kübel, and L. Alff Magnetic exchange coupling behavior was investigated in MnBi/FeCo bilayer system at the hard/soft magnetic interface. We performed a combined study of cross-sectional high resolution transmission electron microscopy (HR-TEM), DFT calculations, and micromagnetic simulations to elucidate effect of int... [Phys. Rev. B 98, 174440] Published Thu Nov 29, 2018

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Phonon-induced linewidths of graphene electronic states (2018)

Bo Hellsing, Thomas Frederiksen, Federico Mazzola, Thiagarajan Balasubramanian, and Justin W. Wells

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-11-30

Beschreibung: Author(s): Bo Hellsing, Thomas Frederiksen, Federico Mazzola, Thiagarajan Balasubramanian, and Justin W. Wells The linewidths of the π and σ bands originating from the electron-phonon coupling in graphene are analyzed based on model calculations and experimental angle-resolved photoemission spectroscopy (ARPES) data. We find evidence for crucial contributions to the lifetime broadening from interband scatter... [Phys. Rev. B 98, 205428] Published Thu Nov 29, 2018

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Nonequilibrium selection of magnetic order in a driven triangular XY antiferromagnet (2018)

Yuan Wan and Roderich Moessner

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-11-30

Beschreibung: Author(s): Yuan Wan and Roderich Moessner We show that a weak periodic drive removes the accidental degeneracy in the ground state of the XY antiferromagnet on the triangular lattice in a uniform static magnetic field. The underlying mechanism involves adding a small periodically modulated component to the magnetic field, which influences f... [Phys. Rev. B 98, 184432] Published Thu Nov 29, 2018

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Possible flexoelectric origin of the Lifshitz transition in ${\mathrm{LaAlO}}_{3}/{\mathrm{SrTiO}}_{3}$ interfaces (2018)

Amany Raslan and W. A. Atkinson

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-01

Beschreibung: Author(s): Amany Raslan and W. A. Atkinson Multiple experiments have observed a sharp transition in the band structure of LaAlO 3 / SrTiO 3 (001) interfaces as a function of applied gate voltage. This Lifshitz transition, between a single occupied band at low electron density and multiple occupied bands at high density, is remarkable for its abr... [Phys. Rev. B 98, 195447] Published Fri Nov 30, 2018

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Spatial confinement, magnetic localization, and their interactions on massless Dirac fermions (2018)

Zhong-Qiu Fu, Yu Zhang, Jia-Bin Qiao, Dong-Lin Ma, Haiwen Liu, Zi-Han Guo, Yi-Cong Wei, Jing-Yi Hu, Qian Xiao, Xin-Rui Mao, and Lin He

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Zhong-Qiu Fu, Yu Zhang, Jia-Bin Qiao, Dong-Lin Ma, Haiwen Liu, Zi-Han Guo, Yi-Cong Wei, Jing-Yi Hu, Qian Xiao, Xin-Rui Mao, and Lin He Understanding different approaches to confining massless Dirac fermions in graphene is of keen interest to researchers; it is also a central problem in making electronic devices based on graphene. Here, we studied spatial confinement, magnetic localization, and their interactions on massless Dirac f... [Phys. Rev. B 98, 241401(R)] Published Mon Dec 03, 2018

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Sign inversion in the terahertz photoconductivity of single-walled carbon nanotube films (2018)

Peter Karlsen, Mikhail V. Shuba, Polina P. Kuzhir, Albert G. Nasibulin, Patrizia Lamberti, and Euan Hendry

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Peter Karlsen, Mikhail V. Shuba, Polina P. Kuzhir, Albert G. Nasibulin, Patrizia Lamberti, and Euan Hendry In recent years, there have been conflicting reports regarding the ultrafast photoconductive response of films of single walled carbon nanotubes (CNTs), which apparently exhibit photoconductivities that can differ even in sign. Here, we observe explicitly that the THz photoconductivity of CNT films ... [Phys. Rev. B 98, 241404(R)] Published Mon Dec 03, 2018

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Twisted graphene bilayer around the first magic angle engineered by heterostrain (2018)

Jia-Bin Qiao, Long-Jing Yin, and Lin He

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Jia-Bin Qiao, Long-Jing Yin, and Lin He Very recently, twisted graphene bilayers (TGBs) around the first magic angle θ ≈ 1 . 1 ∘ have attracted much attention for the realization of exotic quantum states, such as correlated insulator behavior and unconventional superconductivity. Here we elaborately study a series of TGBs around the first magi... [Phys. Rev. B 98, 235402] Published Mon Dec 03, 2018

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Proximity-induced spin-orbit coupling in graphene/${\mathrm{Bi}}_{1.5}{\mathrm{Sb}}_{0.5}{\mathrm{Te}}_{1.7}{\mathrm{Se}}_{1.3}$ heterostructures (2018)

S. Jafarpisheh, A. W. Cummings, K. Watanabe, T. Taniguchi, B. Beschoten, and C. Stampfer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): S. Jafarpisheh, A. W. Cummings, K. Watanabe, T. Taniguchi, B. Beschoten, and C. Stampfer The weak intrinsic spin-orbit coupling in graphene can be greatly enhanced by proximity coupling. Here, we report on the proximity-induced spin-orbit coupling in graphene transferred by hexagonal boron nitride (hBN) onto the topological insulator Bi 1.5 Sb 0.5 Te 1.7 Se 1.3 (BSTS) which was grown on a hBN ... [Phys. Rev. B 98, 241402(R)] Published Mon Dec 03, 2018

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Duality for open fermion systems: Energy-dependent weak coupling and quantum master equations (2018)

J. Schulenborg, J. Splettstoesser, and M. R. Wegewijs

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-05

Beschreibung: Author(s): J. Schulenborg, J. Splettstoesser, and M. R. Wegewijs Open fermion systems with energy-independent bilinear coupling to a fermionic environment have been shown to obey a general duality relation [J. Schulenborg et al. , Phys. Rev. B 93 , 081411 (2016) ] which allows for a drastic simplification of time-evolution calculations. In the weak-coupling limit, ... [Phys. Rev. B 98, 235405] Published Tue Dec 04, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Dihedral-angle-corrected registry-dependent interlayer potential for multilayer graphene structures (2018)

Mingjian Wen, Stephen Carr, Shiang Fang, Efthimios Kaxiras, and Ellad B. Tadmor

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-05

Beschreibung: Author(s): Mingjian Wen, Stephen Carr, Shiang Fang, Efthimios Kaxiras, and Ellad B. Tadmor The structural relaxation of multilayer graphene is essential in describing the interesting electronic properties induced by intentional misalignment of successive layers, including the recently reported superconductivity in twisted bilayer graphene. This is difficult to accomplish without an accura... [Phys. Rev. B 98, 235404] Published Tue Dec 04, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Stability of the skyrmion lattice near the critical temperature in cubic helimagnets (2018)

Victor Laliena, Germán Albalate, and Javier Campo

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): Victor Laliena, Germán Albalate, and Javier Campo The phase diagram of cubic helimagnets near the critical temperature is obtained from a Landau-Ginzburg model, including fluctuations to Gaussian level. The free energy is evaluated via a saddle-point expansion around the local minima of the Landau-Ginzburg functional. The local minima are computed ... [Phys. Rev. B 98, 224407] Published Wed Dec 05, 2018

Schlagwort(e): Magnetism

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Cavity optomagnonics with magnetic textures: Coupling a magnetic vortex to light (2018)

Jasmin Graf, Hannes Pfeifer, Florian Marquardt, and Silvia Viola Kusminskiy

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): Jasmin Graf, Hannes Pfeifer, Florian Marquardt, and Silvia Viola Kusminskiy A unique feature of cavity optomagnonics is the possibility of coherently coupling light to spin excitations on top of magnetic textures. Here, the authors propose a cavity-optomagnonic system with a nonhomogeneous magnetic ground state, namely, a vortex in a magnetic microdisc. Using both analytical and computational methods, they study the cavity-enhanced coupling between optical whispering gallery modes and magnon modes, localized at the vortex. The results, both in terms of value and tunability of the coupling, point to the promise of engineered optomagnonic systems for quantum information platforms. [Phys. Rev. B 98, 241406(R)] Published Wed Dec 05, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Enhanced performance of a quantum-dot-based nanomotor due to Coulomb interactions (2018)

María Florencia Ludovico and Massimo Capone

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): María Florencia Ludovico and Massimo Capone We study the relation between quantum pumping of charge and the work exchanged with the driving potentials in a strongly interacting ac -driven quantum dot. We work in the large-interaction limit and in the adiabatic pumping regime, and we develop a treatment that combines the time-dependent slave-bo... [Phys. Rev. B 98, 235409] Published Wed Dec 05, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Multiple-$Q$ magnetic orders in Rashba-Dresselhaus metals (2018)

Ken N. Okada, Yasuyuki Kato, and Yukitoshi Motome

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): Ken N. Okada, Yasuyuki Kato, and Yukitoshi Motome We study magnetic textures realized in noncentrosymmetric Kondo lattice models in which localized magnetic moments weakly interact with itinerant electrons subject to Rashba and Dresselhaus spin-orbit couplings. By virtue of state-of-the-art numerical simulations as well as variational calculations,... [Phys. Rev. B 98, 224406] Published Wed Dec 05, 2018

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Colossal refrigerant capacity in $[\mathrm{Fe}{(\mathrm{hyptrz})}_{3}]{\mathrm{A}}_{2}·{\mathrm{H}}_{2}\mathrm{O}$ around the freezing temperature of water (2018)

P. J. von Ranke, B. P. Alho, R. M. Ribas, E. P. Nobrega, A. Caldas, V. S. R. de Sousa, M. V. Colaço, Lippy F. Marques, Daniel L. Rocco, and P. O. Ribeiro

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): P. J. von Ranke, B. P. Alho, R. M. Ribas, E. P. Nobrega, A. Caldas, V. S. R. de Sousa, M. V. Colaço, Lippy F. Marques, Daniel L. Rocco, and P. O. Ribeiro We report a giant barocaloric effect in the spin-crossover compound [ Fe ( hyptrz ) 3 ] A 2 · H 2 O with hyptzr = 4 -(3′-hydroxypropyl)-1,2,4-triazole and A = 4 -chlorobenzenesulfonate. The origin of the giant barocaloric effect comes from the strong coupling between the lattice vibration and the electronic states t 2 ... [Phys. Rev. B 98, 224408] Published Wed Dec 05, 2018

Schlagwort(e): Magnetism

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Realizing an ultra-wideband backward-wave metamaterial waveguide (2018)

S. S. Seetharaman, B. Tremain, W. L. Barnes, and I. R. Hooper

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): S. S. Seetharaman, B. Tremain, W. L. Barnes, and I. R. Hooper Electroinductive waves have emerged as an attractive solution for designing metamaterials that support backward propagating waves. Stacked metasurfaces etched with complementary split-ring resonators (CSRRs) have also been shown to exhibit a broadband negative dispersion. We demonstrate, through exp... [Phys. Rev. B 98, 235408] Published Wed Dec 05, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Droplet formation in a one-dimensional system of attractive spinless fermions (2018)

Vera V. Vyborova, Oleg Lychkovskiy, and Alexey N. Rubtsov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): Vera V. Vyborova, Oleg Lychkovskiy, and Alexey N. Rubtsov A translation invariant one-dimensional system of spinless fermions with a finite-range attraction experiences a quantum phase transition to a phase-separated state. While being a conventional Luttinger liquid for a small interaction strength, spinless fermions form a droplet with the size smaller t... [Phys. Rev. B 98, 235407] Published Wed Dec 05, 2018

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Relation between width of zero-bias anomaly and Kondo temperature in transport measurements through correlated quantum dots: Effect of asymmetric coupling to the leads (2018)

D. Pérez Daroca, P. Roura-Bas, and A. A. Aligia

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-07

Beschreibung: Author(s): D. Pérez Daroca, P. Roura-Bas, and A. A. Aligia The zero-bias anomaly at low temperatures, originated by the Kondo effect when an electric current flows through a system formed by a spin- 1 / 2 quantum dot and two metallic contacts is theoretically investigated. In particular, we compare the width of this anomaly 2 T NE with that of the Kondo resonanc... [Phys. Rev. B 98, 245406] Published Thu Dec 06, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Field-induced quantum magnetism in the verdazyl-based charge-transfer salt $[o\text{−}\mathrm{MePy}\text{−}\mathrm{V}\text{−}{(p\text{−}\mathrm{Br})}_{2}]{\mathrm{FeCl}}_{4}$ (2018)

Y. Iwasaki, T. Kida, M. Hagiwara, T. Kawakami, Y. Kono, S. Kittaka, T. Sakakibara, Y. Hosokoshi, and H. Yamaguchi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-08

Beschreibung: Author(s): Y. Iwasaki, T. Kida, M. Hagiwara, T. Kawakami, Y. Kono, S. Kittaka, T. Sakakibara, Y. Hosokoshi, and H. Yamaguchi We successfully synthesized a verdazyl-based charge-transfer salt [ o − MePy − V − ( p − Br ) 2 ] FeCl 4 , which has S V = 1 / 2 on the radical o − MePy − V − ( p − Br ) 2 and S Fe = 5 / 2 on the FeCl 4 anion. Ab initio molecular orbital calculations indicate the formation of an S V = 1 / 2 honeycomb lattice composed of three types of exchan... [Phys. Rev. B 98, 224411] Published Fri Dec 07, 2018

Schlagwort(e): Magnetism

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Vibrational properties and magnetic specific heat of the covalent chain antiferromagnet $\mathrm{RbFeS}{\mathrm{e}}_{2}$ (2018)

A. G. Kiiamov, Y. V. Lysogorskiy, F. G. Vagizov, L. R. Tagirov, D. A. Tayurskii, Z. Seidov, H.-A. Krug von Nidda, V. Tsurkan, D. Croitori, A. Günther, F. Mayr, and A. Loidl

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): A. G. Kiiamov, Y. V. Lysogorskiy, F. G. Vagizov, L. R. Tagirov, D. A. Tayurskii, Z. Seidov, H.-A. Krug von Nidda, V. Tsurkan, D. Croitori, A. Günther, F. Mayr, and A. Loidl The magnetic specific heat of RbFeS e 2 and the spin state of F e 3 + ions in the compound have been studied. Phonon dispersion and phonon density of states (PDOS), element specific and total, were evaluated from first-principles calculations. It is shown that iron atoms in quasi-one-dimensional chains h... [Phys. Rev. B 98, 214411] Published Mon Dec 10, 2018

Schlagwort(e): Magnetism

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Magnetic properties and field-driven dynamics of chiral domain walls in epitaxial ${\mathrm{Pt}\text{/}\mathrm{Co}\text{/}\mathrm{Au}}_{x}{\mathrm{Pt}}_{1−x}$ trilayers (2018)

Kowsar Shahbazi, Aleš Hrabec, Simone Moretti, Michael B. Ward, Thomas A. Moore, Vincent Jeudy, Eduardo Martinez, and Christopher H. Marrows

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): Kowsar Shahbazi, Aleš Hrabec, Simone Moretti, Michael B. Ward, Thomas A. Moore, Vincent Jeudy, Eduardo Martinez, and Christopher H. Marrows Chiral domain walls in ultrathin perpendicularly magnetized layers have a Néel structure stabilized by a Dzyaloshinskii-Moriya interaction (DMI) that is generated at the interface between the ferromagnet and a heavy metal. Different interface materials or properties are required above and below a fe... [Phys. Rev. B 98, 214413] Published Mon Dec 10, 2018

Schlagwort(e): Magnetism

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Antiferromagnetic order is possible in ternary quasicrystal approximants (2018)

A. Ishikawa, T. Fujii, T. Takeuchi, T. Yamada, Y. Matsushita, and R. Tamura

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): A. Ishikawa, T. Fujii, T. Takeuchi, T. Yamada, Y. Matsushita, and R. Tamura Eight years since the discovery of the binary antiferromagnetic (AFM) quasicrystal approximants C d 6 R [R. Tamura et al. , Phys. Rev. B 82 , 220201 (2010) ], we report the observation of an AFM transition in quasicrystal approximants Au-Al- R ( R = Gd and Tb), which represent examples of AFM in ternary quas... [Phys. Rev. B 98, 220403(R)] Published Mon Dec 10, 2018

Schlagwort(e): Magnetism

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Quantum critical nature of the short-range magnetic order in ${\mathrm{Sr}}_{2−x}{\mathrm{La}}_{x}{\mathrm{IrO}}_{4}$ (2018)

Steven T. Rodan, Sungwon Yoon, Suheon Lee, Kwang-Yong Choi, Gareoung Kim, Jong-Soo Rhyee, Akihiro Koda, Wei-Tin Chen, and Fangcheng Chou

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): Steven T. Rodan, Sungwon Yoon, Suheon Lee, Kwang-Yong Choi, Gareoung Kim, Jong-Soo Rhyee, Akihiro Koda, Wei-Tin Chen, and Fangcheng Chou We have investigated the nature of the short-range magnetic phase region of Sr 2 − x La x IrO 4 ( 0 ≤ x ≤ 0.14 ). This so-called spin-orbit Mott insulator's predicted transition to superconductivity with electron doping has remained elusive. Instead, short-range magnetism prevails over an extensive doping range ... [Phys. Rev. B 98, 214412] Published Mon Dec 10, 2018

Schlagwort(e): Magnetism

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Negative charge enhancement of near-surface nitrogen vacancy centers by multicolor excitation (2018)

I. Meirzada, Y. Hovav, S. A. Wolf, and N. Bar-Gill

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-12

Beschreibung: Author(s): I. Meirzada, Y. Hovav, S. A. Wolf, and N. Bar-Gill Nitrogen vacancy (NV) centers in diamond have been identified over the past few years as promising systems for a variety of applications, ranging from quantum information science to magnetic sensing. This relies on the unique optical and spin properties of the negatively charged NV. Many of these ap... [Phys. Rev. B 98, 245411] Published Tue Dec 11, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Hybrid quantum-classical method for simulating high-temperature dynamics of nuclear spins in solids (2018)

Grigory A. Starkov and Boris V. Fine

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-13

Beschreibung: Author(s): Grigory A. Starkov and Boris V. Fine First-principles calculations of high-temperature spin dynamics in solids in the context of nuclear magnetic resonance (NMR) are a long-standing problem, whose conclusive solution can significantly advance the applications of NMR as a diagnostic tool for material properties. In this work, we propose... [Phys. Rev. B 98, 214421] Published Wed Dec 12, 2018

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Comprehensive inelastic neutron scattering study of the multiferroic ${\mathrm{Mn}}_{1−x}{\mathrm{Co}}_{x}{\mathrm{WO}}_{4}$ (2018)

Jinchen Wang, R. S. Fishman, Yiming Qiu, J. A. Fernandez-Baca, Georg Ehlers, K.-C. Liang, Yaqi Wang, Bernd Lorenz, C. W. Chu, and Feng Ye

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-15

Beschreibung: Author(s): Jinchen Wang, R. S. Fishman, Yiming Qiu, J. A. Fernandez-Baca, Georg Ehlers, K.-C. Liang, Yaqi Wang, Bernd Lorenz, C. W. Chu, and Feng Ye Using high-resolution inelastic neutron scattering, we examine the spin dynamics of Mn 1 − x Co x WO 4 in the collinear AF1, the a c − b spiral AF2, and the a c cycloidal AF5 phases. The spin wave excitations are well described by a Heisenberg model with competing long-range exchange interactions ( J i up to 12t... [Phys. Rev. B 98, 214425] Published Fri Dec 14, 2018

Schlagwort(e): Magnetism

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Effect of wire length on quantum coherence in InGaAs wires (2018)

Yuantao Xie and J. J. Heremans

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Yuantao Xie and J. J. Heremans Quantum phase coherence lengths were experimentally measured in nanolithographic wires to investigate the effects of wire length on quantum decoherence, which can be limited by mechanisms such as coupling to an external classical environment. The work demonstrates that device geometry and coupling t... [Phys. Rev. B 98, 035429] Published Tue Jul 24, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Full angular dependence of the spin Hall and ordinary magnetoresistance in epitaxial antiferromagnetic NiO(001)/Pt thin films (2018)

L. Baldrati, A. Ross, T. Niizeki, C. Schneider, R. Ramos, J. Cramer, O. Gomonay, M. Filianina, T. Savchenko, D. Heinze, A. Kleibert, E. Saitoh, J. Sinova, and M. Kläui

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): L. Baldrati, A. Ross, T. Niizeki, C. Schneider, R. Ramos, J. Cramer, O. Gomonay, M. Filianina, T. Savchenko, D. Heinze, A. Kleibert, E. Saitoh, J. Sinova, and M. Kläui Electrical readout of the orientation of an antiferromagnet by detecting the Néel vector is necessary to exploit this class of materials for applications. Here, the authors study bilayers of thin films of the epitaxial antiferromagnetic insulator NiO(001) and the heavy metal Pt. The observed three-dimensional angular dependence of the spin Hall magnetoresistance (SMR) is analyzed, considering the reversible field-induced redistribution of magnetostrictive antiferromagnetic S and T domains in the NiO(001). The authors find that a careful subtraction of the ordinary magnetoresistance contribution in Pt is crucial to determine the SMR amplitude and thus the Néel vector average orientation. [Phys. Rev. B 98, 024422] Published Tue Jul 24, 2018

Schlagwort(e): Magnetism

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Efficient orbital angular momentum transfer between plasmons and free electrons (2018)

Wei Cai, Ori Reinhardt, Ido Kaminer, and F. Javier García de Abajo

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Wei Cai, Ori Reinhardt, Ido Kaminer, and F. Javier García de Abajo Free electrons can efficiently absorb or emit plasmons excited in a thin conductor, giving rise to multiple energy peaks in the transmitted electron spectra separated by multiples of the plasmon energy. When the plasmons are chiral, this can also give rise to transfer of orbital angular momentum (OA... [Phys. Rev. B 98, 045424] Published Tue Jul 24, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Spin- and valley-dependent negative magnetoresistance in a ferromagnetic ${\mathrm{MoS}}_{2}$ junction with a quantum well (2018)

Wei-Tao Lu, Hong-Yu Tian, Hong-Mei Liu, Yun-Fang Li, and Wen Li

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Wei-Tao Lu, Hong-Yu Tian, Hong-Mei Liu, Yun-Fang Li, and Wen Li We studied the spin and valley transports and magnetoresistance effect in a MoS 2 junction with a quantum well inserted between the gate voltage and the ferromagnetic MoS 2 , which can apply generally to other transition metal dichalcogenides with the same crystal structure. In the absence of a quantum... [Phys. Rev. B 98, 075405] Published Mon Aug 06, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Strain-engineered Majorana zero energy modes and ${φ}_{0}$ Josephson state in black phosphorus (2018)

Mohammad Alidoust, Morten Willatzen, and Antti-Pekka Jauho

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): Mohammad Alidoust, Morten Willatzen, and Antti-Pekka Jauho We develop a theory for strain control of Majorana zero energy modes and the Josephson effect in black phosphorus (BP) devices proximity coupled to a superconductor. Employing realistic values for the band parameters subject to strain, we show that the strain closes the intrinsic band gap of BP; how... [Phys. Rev. B 98, 085414] Published Tue Aug 07, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Sliding of an electron crystal of finite size on the surface of superfluid $^{4}\mathrm{He}$ confined in a microchannel (2018)

J.-Y. Lin, A. V. Smorodin, A. O. Badrutdinov, and D. Konstantinov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): J.-Y. Lin, A. V. Smorodin, A. O. Badrutdinov, and D. Konstantinov We present a new study of the nonlinear transport of a two-dimensional electron crystal on the surface of liquid helium confined in a 10 − μ m -wide channel in which the effective length of the crystal can be varied from 10 to 215 μ m . At low driving voltages, the moving electron crystal is strongly coupl... [Phys. Rev. B 98, 085412] Published Tue Aug 07, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Frustration and anisotropic exchange in ytterbium magnets with edge-shared octahedra (2018)

Jeffrey G. Rau and Michel J. P. Gingras

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-09

Beschreibung: Author(s): Jeffrey G. Rau and Michel J. P. Gingras We consider the structure of anisotropic exchange interactions in ytterbium-based insulating rare-earth magnets built from edge-sharing octahedra. We argue the features of trivalent ytterbium and this structural configuration allow for a semiquantitative determination of the different anisotropic ex... [Phys. Rev. B 98, 054408] Published Wed Aug 08, 2018

Schlagwort(e): Magnetism

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Dependence of the adsorption height of graphenelike adsorbates on their dimensionality (2018)

S. Weiß, D. Gerbert, A. Stein, A. K. Schenk, X. Yang, C. Brülke, R. Kremring, S. Feldmann, F. C. Bocquet, M. Gille, S. Hecht, M. Sokolowski, P. Tegeder, S. Soubatch, and F. S. Tautz

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-11

Beschreibung: Author(s): S. Weiß, D. Gerbert, A. Stein, A. K. Schenk, X. Yang, C. Brülke, R. Kremring, S. Feldmann, F. C. Bocquet, M. Gille, S. Hecht, M. Sokolowski, P. Tegeder, S. Soubatch, and F. S. Tautz Comparing the adsorption heights of various graphene nanoribbons on Cu(111) and Au(111) surfaces to those of graphene and π -conjugated planar organic molecules, we observe that two-dimensional graphene adsorbs much further away from the surface than both one-dimensional graphene nanoribbons and π -co... [Phys. Rev. B 98, 075410] Published Fri Aug 10, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Dynamics of a many-body quantum spin system caused by a sequence of pulses (2018)

A. A. Zvyagin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): A. A. Zvyagin Exact results for time evolution of a many-body quantum system (a transverse field Ising spin chain) under the action of several pulses of an external field are obtained. Unlike the situation with a single pulse, the magnetization depends on time for the sequence of two pulses. For the two-pulse cas... [Phys. Rev. B 98, 054414] Published Mon Aug 13, 2018

Schlagwort(e): Magnetism

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Stabilization and modulation of the topological magnetic phase with a ${\mathbb{Z}}_{2}$-vortex lattice in the Kitaev-Heisenberg honeycomb model: The key role of the third-nearest-neighbor interaction (2018)

Xiaoyan Yao and Shuai Dong

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): Xiaoyan Yao and Shuai Dong The topologically nontrivial magnetic phase with a Z 2 -vortex ( Z 2 V ) lattice is investigated by simulation in the Kitaev-Heisenberg honeycomb model expanded by considering the second- and third-nearest-neighbor Heisenberg interactions ( J H 2 and J H 3 ). On the parameter region of the Z 2 V phase, a gradual ... [Phys. Rev. B 98, 054413] Published Mon Aug 13, 2018

Schlagwort(e): Magnetism

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Probing tunneling spin injection into graphene via bias dependence (2018)

Tiancong Zhu, Simranjeet Singh, Jyoti Katoch, Hua Wen, Kirill Belashchenko, Igor Žutić, and Roland K. Kawakami

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): Tiancong Zhu, Simranjeet Singh, Jyoti Katoch, Hua Wen, Kirill Belashchenko, Igor Žutić, and Roland K. Kawakami The bias dependence of spin injection in graphene lateral spin valves is systematically studied to determine the factors affecting the tunneling spin injection efficiency. Three types of junctions are investigated, including MgO and hexagonal boron nitride (hBN) tunnel barriers and direct contacts. ... [Phys. Rev. B 98, 054412] Published Mon Aug 13, 2018

Schlagwort(e): Magnetism

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Optically excited spin pumping mediating collective magnetization dynamics in a spin valve structure (2018)

A. P. Danilov, A. V. Scherbakov, B. A. Glavin, T. L. Linnik, A. M. Kalashnikova, L. A. Shelukhin, D. P. Pattnaik, A. W. Rushforth, C. J. Love, S. A. Cavill, D. R. Yakovlev, and M. Bayer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): A. P. Danilov, A. V. Scherbakov, B. A. Glavin, T. L. Linnik, A. M. Kalashnikova, L. A. Shelukhin, D. P. Pattnaik, A. W. Rushforth, C. J. Love, S. A. Cavill, D. R. Yakovlev, and M. Bayer An alternative method for spin pumping – injection of a pure spin current into a nonmagnetic material by the precessing magnetization in an adjacent ferromagnet – is demonstrated without the need to use microwaves. Femtosecond laser pulses trigger the magnetization precession in adjacent (Fe,Ga) layers separated by a 5-nm Cu spacer. The spin currents emerging from the two layers couple their magnetization, leading to superposition of the two collective modes, observed in time-resolved Kerr rotation measurements. For resonant precession frequencies in the (Fe,Ga) layers, the authors achieve strongly split decay rates of the collective modes, indicating a purely dissipative coupling. [Phys. Rev. B 98, 060406(R)] Published Mon Aug 13, 2018

Schlagwort(e): Magnetism

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Anomalous and regular transport in spin-$\frac{1}{2}$ chains: ac conductivity (2018)

R. J. Sánchez, V. K. Varma, and V. Oganesyan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): R. J. Sánchez, V. K. Varma, and V. Oganesyan We study magnetization transport in anisotropic spin- 1 2 chains governed by the integrable XXZ model with and without integrability-breaking perturbations at high temperatures ( T → ∞ ) using a hybrid approach that combines exact sum rules with judiciously chosen Ansätze. In the integrable XXZ model we f... [Phys. Rev. B 98, 054415] Published Mon Aug 13, 2018

Schlagwort(e): Magnetism

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Thermoelectric properties of a quantum dot coupled to magnetic leads by Rashba spin-orbit interaction (2018)

Łukasz Karwacki and Józef Barnaś

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): Łukasz Karwacki and Józef Barnaś We consider a single-level quantum dot coupled to two leads which are ferromagnetic in general. Apart from tunneling processes conserving electron spin, we also include processes associated with spin flip of tunneling electrons, which appear due to Rashba spin-orbit coupling. Charge and heat current... [Phys. Rev. B 98, 075413] Published Mon Aug 13, 2018

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