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HIGHLIGHTED ARTICLES

Phase separation in dilute solutions of He3 in solid He4

C. Huan, L. Yin, J. S. Xia, D. Candela, B. P. Cowan, and N. S. Sullivan

Phys. Rev. B 95, 104107 (2017) - Published 20 March, 2017

The dynamics of the phase separation of very dilute 3He-4He solid solutions is studied using high-sensitivity low-temperature NMR techniques. This paper compares the results observed at very low concentrations (down to 16 ppm 3He) with previous results up to 2%. The growth of 3He nanodroplets after phase separation is analyzed and shown to follow a one-third power-law dependence at long times as expected for Ostwald ripening. The time scale for the dynamics is governed by the relatively fast quantum diffusion in solid helium, allowing the long-term behavior of the ripening process to be explored by experiments lasting a few days rather than several months, as in the case of metallic alloys.

Localization in random fractal lattices

Arkadiusz Kosior and Krzysztof Sacha

Phys. Rev. B 95, 104206 (2017) - Published 27 March, 2017

Localization and transport of a quantum particle in fractal lattices with random-site connectivity and without any diagonal disorder are investigated. It is the random hopping terms that introduce disorder-causing localization of a single-particle wave function. The lattices are generated so that their fractal (Hausdorff and spectral) dimensions are independently controlled. Therefore, it is possible to analyze how different fractal dimensions influence the localization properties, which is the main purpose of this paper.

Semiclassical analysis of a magnetization plateau in a two-dimensional frustrated ferrimagnet

Edward Parker and Leon Balents

Phys. Rev. B 95, 104411 (2017) - Published 13 March, 2017

Antiferromagnetic spin systems have been extensively studied but still yield surprising new physics, especially on geometrically frustrated lattices and in the quantum regime. Less well studied are ferrimagnets, whose net magnetization is positive but less than that of the fully polarized state. Here, the authors study a frustrated ferrimagnetic spin Hamiltonian on a kagome lattice with both ferromagnetic and antiferromagnetic couplings, inspired by density functional theory analysis of the material Cu3V2O7(OH2)2H2O (volborthite). This model displays a very broad plateau in the magnetization curve at 1/3-full magnetization. We incorporate quantum effects via a semiclassical 1/S expansion and find that they further stabilize the plateau. When the frustrating coupling becomes strong enough to almost destabilize the plateau, we find an instability to bound-magnon “exciton” condensation, which results in an exotic “chiral liquid” phase with relativistic excitations that breaks inversion (but no other) symmetry.

Impact of the skyrmion spin texture on magnetoresistance

André Kubetzka, Christian Hanneken, Roland Wiesendanger, and Kirsten von Bergmann

Phys. Rev. B 95, 104433 (2017) - Published 27 March, 2017

Skyrmions are topological knots in the magnetization, and they can be stabilized as particle-like states in a ferromagnetic environment. Due to their noncollinear spin texture, the local density of states is modified, and they are thus electronically different from their ferromagnetic surroundings. Exploiting the spatial and energy resolution of scanning tunneling microscopy and spectroscopy this work demonstrates how the local spin configuration within a skyrmion modifies the respective differential conductance. This noncollinear magnetoresistance (NCMR) can reach values of 50% in Pd/Fe/Ir(111) and allows imaging of skyrmions with nonmagnetic probe electrodes. Because of its large signal and the reduced technical requirements, NCMR is expected to be useful for the detection of the magnetic state with planar tunnel junctions in skyrmionic spintronics applications.

Theory of multiwave mixing within the superconducting kinetic-inductance traveling-wave amplifier

R. P. Erickson and D. P. Pappas

Phys. Rev. B 95, 104506 (2017) - Published 6 March, 2017

Traveling-wave parametric amplifiers may be fabricated from superconducting films that exhibit highly nonlinear kinetic inductance. The coplanar waveguide of such a microwave device, extending to a meter or more in length but compacted to reside on a chip of the order of a square centimeter, is engineered with periodic variations in its width. These width variations, or loadings, alter the dispersion characteristics of a nonlinear current propagating along the waveguide, changing its group velocity and modulation behavior. A strong pump and a small signal injected into one end of the waveguide mix parametrically in the presence of the nonlinear kinetic inductance. Engineered dispersion induces the favorable conditions of overall phase matching, leading to generation of idler products as well as signal amplification of wide bandwidth, high dynamic range, and low noise, making the device of particular use in quantum computing and photon detection. The authors present a theoretical framework in which signal gain may be calculated solely from loading design. This involves construction of a metamaterial band theory of the engineered dispersion, which is used as a basis to describe the mixing of nonlinear traveling waves.

Twisting Anderson pseudospins with light: Quench dynamics in terahertz-pumped BCS superconductors

Yang-Zhi Chou, Yunxiang Liao, and Matthew S. Foster

Phys. Rev. B 95, 104507 (2017) - Published 8 March, 2017

An exciting recent development is the ability to drive a quantum material into a highly excited, but still phase coherent state, using intense laser sources. Although such a state can be extremely short-lived, it can be long enough for detection using ultrafast spectroscopy. The authors here show how intense laser pulses can generate a new type of nonequilibrium superconducting phase. The authors demonstrate theoretically that the pump induces a “twisted” BCS state that subsequently evolves coherently after the cessation of the pulse. They show how the nonlinear coupling of the pump pulse light can induce coherent dynamics of Δ(t), consistent with the experiment [R. Matsunaga et al. Phys. Rev. Lett. 111, 057002 (2013)]. Moreover, the authors show that more intense pump pulses can create a far-from-equilibrium phase of gapless superconductivity, originally predicted in the context of ultracold atomic gases. The terahertz pump is found to be much more efficient than the interaction quench at producing this gapless phase. These results open the door to engineering and observing new dynamical phases and phase transitions in quantum materials.

RAPID COMMUNICATIONS

Structure, structural phase transitions, mechanical properties, defects

Prediction of superstrong τ-boron carbide phase from quantum mechanics

Qi An

Phys. Rev. B 95, 100101(R) (2017) - Published 3 March, 2017

Inhomogeneous, disordered, and partially ordered systems

Fractional quantum Hall effect in strained graphene: Stability of Laughlin states in disordered pseudomagnetic fields

Andrey A. Bagrov, Alessandro Principi, and Mikhail I. Katsnelson

Phys. Rev. B 95, 100201(R) (2017) - Published 14 March, 2017

Magnetism

Observation of complete inversion of the hysteresis loop in a bimodal magnetic thin film

Tuhin Maity, Demie Kepaptsoglou, Michael Schmidt, Quentin Ramasse, and Saibal Roy

Phys. Rev. B 95, 100401(R) (2017) - Published 3 March, 2017

Entanglement entropy and topological order in resonating valence-bond quantum spin liquids

Julia Wildeboer, Alexander Seidel, and Roger G. Melko

Phys. Rev. B 95, 100402(R) (2017) - Published 6 March, 2017

Nonreciprocity of electrically excited thermal spin signals in CoFeAl-Cu-Py lateral spin valves

Shaojie Hu, Xiaomin Cui, Tatsuya Nomura, Tai Min, and Takashi Kimura

Phys. Rev. B 95, 100403(R) (2017) - Published 20 March, 2017

Superfluidity and superconductivity

Anticorrelation between polar lattice instability and superconductivity in the Weyl semimetal candidate MoTe2

H. Takahashi, T. Akiba, K. Imura, T. Shiino, K. Deguchi, N. K. Sato, H. Sakai, M. S. Bahramy, and S. Ishiwata

Phys. Rev. B 95, 100501(R) (2017) - Published 7 March, 2017

Nodeless multiband superconductivity in stoichiometric single-crystalline CaKFe4As4

Kyuil Cho, A. Fente, S. Teknowijoyo, M. A. Tanatar, K. R. Joshi, N. M. Nusran, T. Kong, W. R. Meier, U. Kaluarachchi, I. Guillamón, H. Suderow, S. L. Bud'ko, P. C. Canfield, and R. Prozorov

Phys. Rev. B 95, 100502(R) (2017) - Published 8 March, 2017

Manipulating magnetic moments by superconducting currents

Eugene M. Chudnovsky

Phys. Rev. B 95, 100503(R) (2017) - Published 13 March, 2017

Low-energy spin excitations in (Li0.8Fe0.2)ODFeSe superconductor studied with inelastic neutron scattering

Mingwei Ma, Lichen Wang, Philippe Bourges, Yvan Sidis, Sergey Danilkin, and Yuan Li

Phys. Rev. B 95, 100504(R) (2017) - Published 17 March, 2017

Accessing the entire overdoped regime in pristine YBa2Cu3O6+x by application of pressure

P. L. Alireza, G. H. Zhang, W. Guo, J. Porras, T. Loew, Y.-T. Hsu, G. G. Lonzarich, M. Le Tacon, B. Keimer, and Suchitra E. Sebastian

Phys. Rev. B 95, 100505(R) (2017) - Published 27 March, 2017

ARTICLES

Structure, structural phase transitions, mechanical properties, defects

Abnormal volumetric thermal expansion in the hourglass fermion materials KHgAs and KHgSb

Dahu Chang, Chun-Yao Niu, Xiaowei Huang, Qiang Sun, Jun-Hyung Cho, and Yu Jia

Phys. Rev. B 95, 104101 (2017) - Published 8 March, 2017

Charged domain walls under super-band-gap illumination

B. Sturman and E. Podivilov

Phys. Rev. B 95, 104102 (2017) - Published 10 March, 2017

Positron annihilation spectroscopy investigation of vacancy defects in neutron-irradiated 3C-SiC

Xunxiang Hu, Takaaki Koyanagi, Yutai Katoh, and Brian D. Wirth

Phys. Rev. B 95, 104103 (2017) - Published 10 March, 2017

Intrinsic polarization switching mechanisms in BiFeO3

Bin Xu, Vincent Garcia, Stéphane Fusil, Manuel Bibes, and L. Bellaiche

Phys. Rev. B 95, 104104 (2017) - Published 14 March, 2017

High accuracy and transferability of a neural network potential through charge equilibration for calcium fluoride

Somayeh Faraji, S. Alireza Ghasemi, Samare Rostami, Robabe Rasoulkhani, Bastian Schaefer, Stefan Goedecker, and Maximilian Amsler

Phys. Rev. B 95, 104105 (2017) - Published 16 March, 2017

Friction of atomically stepped surfaces

R. J. Dikken, B. J. Thijsse, and L. Nicola

Phys. Rev. B 95, 104106 (2017) - Published 20 March, 2017

Phase separation in dilute solutions of He3 in solid He4

C. Huan, L. Yin, J. S. Xia, D. Candela, B. P. Cowan, and N. S. Sullivan

Phys. Rev. B 95, 104107 (2017) - Published 20 March, 2017

The dynamics of the phase separation of very dilute 3He-4He solid solutions is studied using high-sensitivity low-temperature NMR techniques. This paper compares the results observed at very low concentrations (down to 16 ppm 3He) with previous results up to 2%. The growth of 3He nanodroplets after phase separation is analyzed and shown to follow a one-third power-law dependence at long times as expected for Ostwald ripening. The time scale for the dynamics is governed by the relatively fast quantum diffusion in solid helium, allowing the long-term behavior of the ripening process to be explored by experiments lasting a few days rather than several months, as in the case of metallic alloys.

Ab initio explanation of disorder and off-stoichiometry in Fe-Mn-Al-C κ carbides

Poulumi Dey, Roman Nazarov, Biswanath Dutta, Mengji Yao, Michael Herbig, Martin Friák, Tilmann Hickel, Dierk Raabe, and Jörg Neugebauer

Phys. Rev. B 95, 104108 (2017) - Published 22 March, 2017

Non-Hookean statistical mechanics of clamped graphene ribbons

Mark J. Bowick, Andrej Košmrlj, David R. Nelson, and Rastko Sknepnek

Phys. Rev. B 95, 104109 (2017) - Published 22 March, 2017

Nb-H system at high pressures and temperatures

Guangtao Liu, Stanislav Besedin, Alla Irodova, Hanyu Liu, Guoying Gao, Mikhail Eremets, Xin Wang, and Yanming Ma

Phys. Rev. B 95, 104110 (2017) - Published 24 March, 2017

Nanoscale x-ray imaging of circuit features without wafer etching

Junjing Deng, Young Pyo Hong, Si Chen, Youssef S. G. Nashed, Tom Peterka, Anthony J. F. Levi, John Damoulakis, Sayan Saha, Travis Eiles, and Chris Jacobsen

Phys. Rev. B 95, 104111 (2017) - Published 24 March, 2017

Stability limits and transformation pathways of α-quartz under high pressure

Q. Y. Hu, J.-F. Shu, W. G. Yang, C. Park, M. W. Chen, T. Fujita, H.-K. Mao, and H. W. Sheng

Phys. Rev. B 95, 104112 (2017) - Published 31 March, 2017

Inhomogeneous, disordered, and partially ordered systems

Probing of the pseudogap via thermoelectric properties in the Au-Al-Gd quasicrystal approximant

Asuka Ishikawa, Yoshiki Takagiwa, Kaoru Kimura, and Ryuji Tamura

Phys. Rev. B 95, 104201 (2017) - Published 6 March, 2017

Connection between fragility, mean-squared displacement, and shear modulus in two van der Waals bonded glass-forming liquids

Henriette W. Hansen, Bernhard Frick, Tina Hecksher, Jeppe C. Dyre, and Kristine Niss

Phys. Rev. B 95, 104202 (2017) - Published 10 March, 2017

Disentangling interatomic repulsion and anharmonicity in the viscosity and fragility of glasses

J. Krausser, A. E. Lagogianni, K. Samwer, and A. Zaccone

Phys. Rev. B 95, 104203 (2017) - Published 14 March, 2017

Probability distribution of the entanglement across a cut at an infinite-randomness fixed point

Trithep Devakul, Satya N. Majumdar, and David A. Huse

Phys. Rev. B 95, 104204 (2017) - Published 20 March, 2017

First-principles simulations of vibrational decay and lifetimes in a-Si:H and a-Si:D

Raymond Atta-Fynn, David A. Drabold, Stephen R. Elliott, and Parthapratim Biswas

Phys. Rev. B 95, 104205 (2017) - Published 21 March, 2017

Localization in random fractal lattices

Arkadiusz Kosior and Krzysztof Sacha

Phys. Rev. B 95, 104206 (2017) - Published 27 March, 2017

Localization and transport of a quantum particle in fractal lattices with random-site connectivity and without any diagonal disorder are investigated. It is the random hopping terms that introduce disorder-causing localization of a single-particle wave function. The lattices are generated so that their fractal (Hausdorff and spectral) dimensions are independently controlled. Therefore, it is possible to analyze how different fractal dimensions influence the localization properties, which is the main purpose of this paper.

Analytical theory for charge carrier recombination in blend organic solar cells

A. V. Nenashev, M. Wiemer, A. V. Dvurechenskii, L. V. Kulik, A. B. Pevtsov, F. Gebhard, M. Koch, and S. D. Baranovskii

Phys. Rev. B 95, 104207 (2017) - Published 28 March, 2017

Dynamics, dynamical systems, lattice effects

Time-dependent resonant tunneling transport: Keldysh and Kadanoff-Baym nonequilibrium Green's functions in an analytically soluble problem

Mariana M. Odashima and Caio H. Lewenkopf

Phys. Rev. B 95, 104301 (2017) - Published 3 March, 2017

Dynamic Jahn-Teller viewpoint for generation mechanism of asymmetric modes of coherent phonons

Yosuke Kayanuma and Kazutaka G. Nakamura

Phys. Rev. B 95, 104302 (2017) - Published 8 March, 2017

Phonon spectra of plutonium at high temperatures

Boris Dorado, François Bottin, and Johann Bouchet

Phys. Rev. B 95, 104303 (2017) - Published 10 March, 2017

Thermalization rates in the one-dimensional Hubbard model with next-to-nearest neighbor hopping

Fabian R. A. Biebl and Stefan Kehrein

Phys. Rev. B 95, 104304 (2017) - Published 17 March, 2017

Exceptional points of degeneracy and PT symmetry in photonic coupled chains of scatterers

Mohamed A. K. Othman, Vincenzo Galdi, and Filippo Capolino

Phys. Rev. B 95, 104305 (2017) - Published 17 March, 2017

Dynamics of the quantum phase transition in the one-dimensional Bose-Hubbard model: Excitations and correlations induced by a quench

Bartłomiej Gardas, Jacek Dziarmaga, and Wojciech H. Zurek

Phys. Rev. B 95, 104306 (2017) - Published 24 March, 2017

Raman spectrum of plutonium dioxide: Vibrational and crystal field modes

M. Naji, N. Magnani, L. J. Bonales, S. Mastromarino, J.-Y. Colle, J. Cobos, and D. Manara

Phys. Rev. B 95, 104307 (2017) - Published 29 March, 2017

Effect of periodic kicking on Chern insulators

L. C. Wang, X. P. Li, and C. F. Li

Phys. Rev. B 95, 104308 (2017) - Published 30 March, 2017

Fourier-like conduction and finite one-dimensional thermal conductivity in long silicon nanowires by approach-to-equilibrium molecular dynamics

Hayat Zaoui, Pier Luca Palla, Fabrizio Cleri, and Evelyne Lampin

Phys. Rev. B 95, 104309 (2017) - Published 31 March, 2017

Magnetism

Reversible vector ratchets for skyrmion systems

X. Ma, C. J. Olson Reichhardt, and C. Reichhardt

Phys. Rev. B 95, 104401 (2017) - Published 3 March, 2017

Competition between Kondo effect and RKKY physics in graphene magnetism

A. Allerdt, A. E. Feiguin, and S. Das Sarma

Phys. Rev. B 95, 104402 (2017) - Published 6 March, 2017

Temperature dependence of spin-orbit torques in Cu-Au alloys

Yan Wen, Jun Wu, Peng Li, Qiang Zhang, Yuelei Zhao, Aurelien Manchon, John Q. Xiao, and Xixiang Zhang

Phys. Rev. B 95, 104403 (2017) - Published 6 March, 2017

Theory of Kondo suppression of spin polarization in nonlocal spin valves

K.-W. Kim, L. O'Brien, P. A. Crowell, C. Leighton, and M. D. Stiles

Phys. Rev. B 95, 104404 (2017) - Published 7 March, 2017

Gate control of spin-polarized conductance in alloyed transitional metal nanocontacts

Ilia N. Sivkov, Oleg O. Brovko, Ivan Rungger, and Valeri S. Stepanyuk

Phys. Rev. B 95, 104405 (2017) - Published 8 March, 2017

Steady motion of skyrmions and domains walls under diffusive spin torques

Ricardo Gabriel Elías, Nicolas Vidal-Silva, and Aurélien Manchon

Phys. Rev. B 95, 104406 (2017) - Published 8 March, 2017

Conduction electrons mediating the evolution from antiferromagnetic to ferromagnetic ordering in Gd(Co1yFey)2Zn20 (0y1)

M. Cabrera-Baez, A. Naranjo-Uribe, J. M. Osorio-Guillén, C. Rettori, and M. A. Avila

Phys. Rev. B 95, 104407 (2017) - Published 8 March, 2017

Sodium layer chiral distribution and spin structure of Na2Ni2TeO6 with a Ni honeycomb lattice

Sunil K. Karna, Y. Zhao, R. Sankar, M. Avdeev, P. C. Tseng, C. W. Wang, G. J. Shu, K. Matan, G. Y. Guo, and F. C. Chou

Phys. Rev. B 95, 104408 (2017) - Published 8 March, 2017

Hybrid excitations due to crystal field, spin-orbit coupling, and spin waves in LiFePO4

Yuen Yiu, Manh Duc Le, Rasmus Toft-Petersen, Georg Ehlers, Robert J. McQueeney, and David Vaknin

Phys. Rev. B 95, 104409 (2017) - Published 9 March, 2017

Double exchange bias in ferrimagnetic heterostructures

B. Hebler, P. Reinhardt, G. L. Katona, O. Hellwig, and M. Albrecht

Phys. Rev. B 95, 104410 (2017) - Published 10 March, 2017

Semiclassical analysis of a magnetization plateau in a two-dimensional frustrated ferrimagnet

Edward Parker and Leon Balents

Phys. Rev. B 95, 104411 (2017) - Published 13 March, 2017

Antiferromagnetic spin systems have been extensively studied but still yield surprising new physics, especially on geometrically frustrated lattices and in the quantum regime. Less well studied are ferrimagnets, whose net magnetization is positive but less than that of the fully polarized state. Here, the authors study a frustrated ferrimagnetic spin Hamiltonian on a kagome lattice with both ferromagnetic and antiferromagnetic couplings, inspired by density functional theory analysis of the material Cu3V2O7(OH2)2H2O (volborthite). This model displays a very broad plateau in the magnetization curve at 1/3-full magnetization. We incorporate quantum effects via a semiclassical 1/S expansion and find that they further stabilize the plateau. When the frustrating coupling becomes strong enough to almost destabilize the plateau, we find an instability to bound-magnon “exciton” condensation, which results in an exotic “chiral liquid” phase with relativistic excitations that breaks inversion (but no other) symmetry.

E-type noncollinear magnetic ordering in multiferroic oLuMnO3

Saumya Mukherjee, Andreas Dönni, Taro Nakajima, Setsuo Mitsuda, Makoto Tachibana, Hideaki Kitazawa, Vladimir Pomjakushin, Lukas Keller, Christof Niedermayer, Andrea Scaramucci, and Michel Kenzelmann

Phys. Rev. B 95, 104412 (2017) - Published 13 March, 2017

Interaction of spin-orbital-lattice degrees of freedom: Vibronic state of the corner-sharing-tetrahedral frustrated spin system HoBaFe4O7 by dynamical Jahn-Teller effect

Kazuya Kamazawa, Motoyuki Ishikado, Seiko Ohira-Kawamura, Yukinobu Kawakita, Kazuhisa Kakurai, Kenji Nakajima, and Masatoshi Sato

Phys. Rev. B 95, 104413 (2017) - Published 13 March, 2017

Effect of Sr doping on the magnetic exchange interactions in manganites of type La1xSrxMnyA1yO3(A=Ga,Ti;0.1y1)

A. Furrer, A. Podlesnyak, E. Pomjakushina, and V. Pomjakushin

Phys. Rev. B 95, 104414 (2017) - Published 14 March, 2017

Collective resonant dynamics of the chiral spin soliton lattice in a monoaxial chiral magnetic crystal

F. J. T. Goncalves, T. Sogo, Y. Shimamoto, Y. Kousaka, J. Akimitsu, S. Nishihara, K. Inoue, D. Yoshizawa, M. Hagiwara, M. Mito, R. L. Stamps, I. G. Bostrem, Vl. E. Sinitsyn, A. S. Ovchinnikov, J. Kishine, and Y. Togawa

Phys. Rev. B 95, 104415 (2017) - Published 14 March, 2017

Structural deformation of the S=1 kagome-lattice compound KV3Ge2O9

Eigo Takagi, Takuya Aoyama, Shigeo Hara, Hirohiko Sato, Tsuyoshi Kimura, and Yusuke Wakabayashi

Phys. Rev. B 95, 104416 (2017) - Published 15 March, 2017

Dynamic dependence to domain wall propagation through artificial spin ice

D. M. Burn, M. Chadha, and W. R. Branford

Phys. Rev. B 95, 104417 (2017) - Published 15 March, 2017

Spin-flop transition in the easy-plane antiferromagnet nickel oxide

F. L. A. Machado, P. R. T. Ribeiro, J. Holanda, R. L. Rodríguez-Suárez, A. Azevedo, and S. M. Rezende

Phys. Rev. B 95, 104418 (2017) - Published 15 March, 2017

Magnetic order in four-layered Aurivillus phases

Axiel Yaël Birenbaum, Andrea Scaramucci, and Claude Ederer

Phys. Rev. B 95, 104419 (2017) - Published 16 March, 2017

αβ and βγ phase boundaries of solid oxygen observed by adiabatic magnetocaloric effect

T. Nomura, Y. Kohama, Y. H. Matsuda, K. Kindo, and T. C. Kobayashi

Phys. Rev. B 95, 104420 (2017) - Published 16 March, 2017

Nonlinear and chaotic magnetization dynamics near bifurcations of the Landau-Lifshitz-Gilbert equation

Aaron M. Ferona and Robert E. Camley

Phys. Rev. B 95, 104421 (2017) - Published 16 March, 2017

Vogel-Fulcher-Tammann freezing of a thermally fluctuating artificial spin ice probed by x-ray photon correlation spectroscopy

S. A. Morley, D. Alba Venero, J. M. Porro, S. T. Riley, A. Stein, P. Steadman, R. L. Stamps, S. Langridge, and C. H. Marrows

Phys. Rev. B 95, 104422 (2017) - Published 16 March, 2017

Vectorial spin polarization detection in multichannel spin-resolved photoemission spectroscopy using an Ir(001) imaging spin filter

Erik D. Schaefer, Stephan Borek, Jürgen Braun, Ján Minár, Hubert Ebert, Katerina Medjanik, Dmytro Kutnyakhov, Gerd Schönhense, and Hans-Joachim Elmers

Phys. Rev. B 95, 104423 (2017) - Published 17 March, 2017

Giant multicaloric response of bulk Fe49Rh51

Enric Stern-Taulats, Teresa Castán, Antoni Planes, Laura H. Lewis, Radhika Barua, Sabyasachi Pramanick, Subham Majumdar, and Lluís Mañosa

Phys. Rev. B 95, 104424 (2017) - Published 17 March, 2017

Broadband magnetoelastic coupling in magnonic-phononic crystals for high-frequency nanoscale spin-wave generation

Piotr Graczyk, Jarosław Kłos, and Maciej Krawczyk

Phys. Rev. B 95, 104425 (2017) - Published 20 March, 2017

Dynamic coupling of ferromagnets via spin Hall magnetoresistance

Tomohiro Taniguchi

Phys. Rev. B 95, 104426 (2017) - Published 20 March, 2017

Electronic structure and magnetic properties in T2AlB2 (T=Fe, Mn, Cr, Co, and Ni) and their alloys

Liqin Ke, Bruce N. Harmon, and Matthew J. Kramer

Phys. Rev. B 95, 104427 (2017) - Published 20 March, 2017

S=12 quantum critical spin ladders produced by orbital ordering in Ba2CuTeO6

A. S. Gibbs, A. Yamamoto, A. N. Yaresko, K. S. Knight, H. Yasuoka, M. Majumder, M. Baenitz, P. J. Saines, J. R. Hester, D. Hashizume, A. Kondo, K. Kindo, and H. Takagi

Phys. Rev. B 95, 104428 (2017) - Published 21 March, 2017

Spin-orbit-based device for electron spin polarization

Y. Avishai and Y. B. Band

Phys. Rev. B 95, 104429 (2017) - Published 21 March, 2017

Dynamics of magnetic nanoparticles in a viscous fluid driven by rotating magnetic fields

Klaus D. Usadel

Phys. Rev. B 95, 104430 (2017) - Published 21 March, 2017

Spin-wave approach to the two-magnon Raman scattering in a J1xJ1yJ2Jc antiferromagnetic Heisenberg model

Changle Liu, Anmin Zhang, Qingming Zhang, Rong Yu, and Xiaoqun Wang

Phys. Rev. B 95, 104431 (2017) - Published 22 March, 2017

Thermal spin torques in magnetic insulators

H. Yu, S. D. Brechet, P. Che, F. A. Vetro, M. Collet, S. Tu, Y. G. Zhang, Y. Zhang, T. Stueckler, L. Wang, H. Cui, D. Wang, C. Zhao, P. Bortolotti, A. Anane, J-Ph. Ansermet, and W. Zhao

Phys. Rev. B 95, 104432 (2017) - Published 23 March, 2017

Impact of the skyrmion spin texture on magnetoresistance

André Kubetzka, Christian Hanneken, Roland Wiesendanger, and Kirsten von Bergmann

Phys. Rev. B 95, 104433 (2017) - Published 27 March, 2017

Skyrmions are topological knots in the magnetization, and they can be stabilized as particle-like states in a ferromagnetic environment. Due to their noncollinear spin texture, the local density of states is modified, and they are thus electronically different from their ferromagnetic surroundings. Exploiting the spatial and energy resolution of scanning tunneling microscopy and spectroscopy this work demonstrates how the local spin configuration within a skyrmion modifies the respective differential conductance. This noncollinear magnetoresistance (NCMR) can reach values of 50% in Pd/Fe/Ir(111) and allows imaging of skyrmions with nonmagnetic probe electrodes. Because of its large signal and the reduced technical requirements, NCMR is expected to be useful for the detection of the magnetic state with planar tunnel junctions in skyrmionic spintronics applications.

Anomalous spin-orbit torque switching in synthetic antiferromagnets

Chong Bi, Hamid Almasi, Kyle Price, Ty Newhouse-Illige, Meng Xu, Shane R. Allen, Xin Fan, and Weigang Wang

Phys. Rev. B 95, 104434 (2017) - Published 28 March, 2017

Spin-orbit torque in MgO/CoFeB/Ta/CoFeB/MgO symmetric structure with interlayer antiferromagnetic coupling

G. Y. Shi, C. H. Wan, Y. S. Chang, F. Li, X. J. Zhou, P. X. Zhang, J. W. Cai, X. F. Han, F. Pan, and C. Song

Phys. Rev. B 95, 104435 (2017) - Published 28 March, 2017

Spin currents, spin torques, and the concept of spin superfluidity

Andreas Rückriegel and Peter Kopietz

Phys. Rev. B 95, 104436 (2017) - Published 28 March, 2017

Magnetic phase transitions and magnetoelastic coupling in S=12 Heisenberg antiferromagnets

Amal al-Wahish, K. R. O'Neal, C. Lee, S. Fan, K. Hughey, M. O. Yokosuk, A. J. Clune, Z. Li, J. A. Schlueter, J. L. Manson, M.-H. Whangbo, and J. L. Musfeldt

Phys. Rev. B 95, 104437 (2017) - Published 28 March, 2017

Scaling laws of dipolar magnetic systems at finite temperature

D. Laroze, P. Díaz, and R. L. Stamps

Phys. Rev. B 95, 104438 (2017) - Published 29 March, 2017

Structural and magnetic properties of two branches of the tripod-kagome-lattice family A2R3Sb3O14 (A = Mg, Zn; R = Pr, Nd, Gd, Tb, Dy, Ho, Er, Yb)

Z. L. Dun, J. Trinh, M. Lee, E. S. Choi, K. Li, Y. F. Hu, Y. X. Wang, N. Blanc, A. P. Ramirez, and H. D. Zhou

Phys. Rev. B 95, 104439 (2017) - Published 30 March, 2017

Hidden order signatures in the antiferromagnetic phase of U(Ru1xFex)2Si2

T. J. Williams, A. A. Aczel, M. B. Stone, M. N. Wilson, and G. M. Luke

Phys. Rev. B 95, 104440 (2017) - Published 31 March, 2017

Influence of the thermal interface resistance on the thermovoltage of a magnetic tunnel junction

Tim Böhnert, Roberta Dutra, Rubem L. Sommer, Elvira Paz, Santiago Serrano-Guisan, Ricardo Ferreira, and Paulo P. Freitas

Phys. Rev. B 95, 104441 (2017) - Published 31 March, 2017

Evolution of spin correlations in SrDy2O4 in an applied magnetic field

O. A. Petrenko, O. Young, D. Brunt, G. Balakrishnan, P. Manuel, D. D. Khalyavin, and C. Ritter

Phys. Rev. B 95, 104442 (2017) - Published 31 March, 2017

Superfluidity and superconductivity

Phase diagram of UCoGe

V. P. Mineev

Phys. Rev. B 95, 104501 (2017) - Published 1 March, 2017

Quantum vortices and thermally induced luminescence of nitrogen nanoclusters immersed in liquid helium

A. Meraki, P. T. McColgan, P. M. Rentzepis, R. Z. Li, D. M. Lee, and V. V. Khmelenko

Phys. Rev. B 95, 104502 (2017) - Published 1 March, 2017

Theory of light-induced resonances with collective Higgs and Leggett modes in multiband superconductors

Yuta Murotani, Naoto Tsuji, and Hideo Aoki

Phys. Rev. B 95, 104503 (2017) - Published 2 March, 2017

Unusual nodal behaviors of the superconducting gap in the iron-based superconductor Ba(Fe0.65Ru0.35)2As2: Effects of spin-orbit coupling

L. Liu, K. Okazaki, T. Yoshida, H. Suzuki, M. Horio, L. C. C. Ambolode, II, J. Xu, S. Ideta, M. Hashimoto, D. H. Lu, Z.-X. Shen, Y. Ota, S. Shin, M. Nakajima, S. Ishida, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Mikami, T. Kakeshita, Y. Yamakawa, H. Kontani, S. Uchida, and A. Fujimori

Phys. Rev. B 95, 104504 (2017) - Published 6 March, 2017

Metastability and hysteretic vortex pinning near the order-disorder transition in NbSe2: Interplay between plastic and elastic energy barriers

M. Marziali Bermúdez, E. R. Louden, M. R. Eskildsen, C. D. Dewhurst, V. Bekeris, and G. Pasquini

Phys. Rev. B 95, 104505 (2017) - Published 6 March, 2017

Theory of multiwave mixing within the superconducting kinetic-inductance traveling-wave amplifier

R. P. Erickson and D. P. Pappas

Phys. Rev. B 95, 104506 (2017) - Published 6 March, 2017

Traveling-wave parametric amplifiers may be fabricated from superconducting films that exhibit highly nonlinear kinetic inductance. The coplanar waveguide of such a microwave device, extending to a meter or more in length but compacted to reside on a chip of the order of a square centimeter, is engineered with periodic variations in its width. These width variations, or loadings, alter the dispersion characteristics of a nonlinear current propagating along the waveguide, changing its group velocity and modulation behavior. A strong pump and a small signal injected into one end of the waveguide mix parametrically in the presence of the nonlinear kinetic inductance. Engineered dispersion induces the favorable conditions of overall phase matching, leading to generation of idler products as well as signal amplification of wide bandwidth, high dynamic range, and low noise, making the device of particular use in quantum computing and photon detection. The authors present a theoretical framework in which signal gain may be calculated solely from loading design. This involves construction of a metamaterial band theory of the engineered dispersion, which is used as a basis to describe the mixing of nonlinear traveling waves.

Twisting Anderson pseudospins with light: Quench dynamics in terahertz-pumped BCS superconductors

Yang-Zhi Chou, Yunxiang Liao, and Matthew S. Foster

Phys. Rev. B 95, 104507 (2017) - Published 8 March, 2017

An exciting recent development is the ability to drive a quantum material into a highly excited, but still phase coherent state, using intense laser sources. Although such a state can be extremely short-lived, it can be long enough for detection using ultrafast spectroscopy. The authors here show how intense laser pulses can generate a new type of nonequilibrium superconducting phase. The authors demonstrate theoretically that the pump induces a “twisted” BCS state that subsequently evolves coherently after the cessation of the pulse. They show how the nonlinear coupling of the pump pulse light can induce coherent dynamics of Δ(t), consistent with the experiment [R. Matsunaga et al. Phys. Rev. Lett. 111, 057002 (2013)]. Moreover, the authors show that more intense pump pulses can create a far-from-equilibrium phase of gapless superconductivity, originally predicted in the context of ultracold atomic gases. The terahertz pump is found to be much more efficient than the interaction quench at producing this gapless phase. These results open the door to engineering and observing new dynamical phases and phase transitions in quantum materials.

Optical melting of the transverse Josephson plasmon: A comparison between bilayer and trilayer cuprates

W. Hu, D. Nicoletti, A. V. Boris, B. Keimer, and A. Cavalleri

Phys. Rev. B 95, 104508 (2017) - Published 10 March, 2017

Spatial variation of the two-fold anisotropic superconducting gap in a monolayer of FeSe0.5Te0.5 on a topological insulator

A. Kamlapure, S. Manna, L. Cornils, T. Hänke, M. Bremholm, Ph. Hofmann, J. Wiebe, and R. Wiesendanger

Phys. Rev. B 95, 104509 (2017) - Published 13 March, 2017

Effective SU(2) theory for the pseudogap state

X. Montiel, T. Kloss, and C. Pépin

Phys. Rev. B 95, 104510 (2017) - Published 13 March, 2017

Theory of surface Andreev bound states and tunneling spectroscopy in three-dimensional chiral superconductors

Shun Tamura, Shingo Kobayashi, Lu Bo, and Yukio Tanaka

Phys. Rev. B 95, 104511 (2017) - Published 13 March, 2017

Opening a nodal gap by fluctuating spin-density wave in lightly doped La2xSrxCuO4

Itzik Kapon, David S. Ellis, Gil Drachuck, Galina Bazalitski, Eugen Weschke, Enrico Schierle, Jörg Strempfer, Christof Niedermayer, and Amit Keren

Phys. Rev. B 95, 104512 (2017) - Published 14 March, 2017

Superconductor-antiferromagnet-superconductor π Josephson junction based on an antiferromagnetic barrier

Lev Bulaevskii, Ronivon Eneias, and Alvaro Ferraz

Phys. Rev. B 95, 104513 (2017) - Published 20 March, 2017

Effects of heavy-ion irradiation on FeSe

Yue Sun, Akiyoshi Park, Sunseng Pyon, Tsuyoshi Tamegai, Tadashi Kambara, and Ataru Ichinose

Phys. Rev. B 95, 104514 (2017) - Published 21 March, 2017

Unconventional superconductivity from magnetism in transition-metal dichalcogenides

M. A. Rahimi, A. G. Moghaddam, C. Dykstra, M. Governale, and U. Zülicke

Phys. Rev. B 95, 104515 (2017) - Published 21 March, 2017

Spin-flip reflection at the normal metal-spin superconductor interface

Peng Lv, Ai-Min Guo, Huaiyu Li, Chunxiao Liu, X. C. Xie, and Qing-Feng Sun

Phys. Rev. B 95, 104516 (2017) - Published 22 March, 2017

Enhancement of crossed Andreev reflection in a superconducting ladder connected to normal metal leads

Abhiram Soori and Subroto Mukerjee

Phys. Rev. B 95, 104517 (2017) - Published 23 March, 2017

Atomic displacements in quantum crystals

Marisa Dusseault and Massimo Boninsegni

Phys. Rev. B 95, 104518 (2017) - Published 23 March, 2017

Pattern formation in vortex matter with pinning and frustrated intervortex interactions

H. J. Zhao, V. R. Misko, J. Tempere, and F. Nori

Phys. Rev. B 95, 104519 (2017) - Published 28 March, 2017

Crossover between Abrikosov vortex lattice and superconducting droplet state in superconductors with modulated disorder

A. A. Kopasov, D. A. Savinov, and A. S. Mel'nikov

Phys. Rev. B 95, 104520 (2017) - Published 30 March, 2017

Superconducting order parameter π-phase shift in magnetic impurity wires

Kristofer Björnson, Alexander V. Balatsky, and Annica M. Black-Schaffer

Phys. Rev. B 95, 104521 (2017) - Published 31 March, 2017

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