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HIGHLIGHTED ARTICLES

Spin state ordering of strongly correlating LaCoO3 induced at ultrahigh magnetic fields

Akihiko Ikeda, Toshihiro Nomura, Yasuhiro H. Matsuda, Akira Matsuo, Koichi Kindo, and Keisuke Sato

Phys. Rev. B 93, 220401(R) (2016) - Published 6 June, 2016

An additional degree of freedom in cobalt oxides that makes them fascinating is the spin state of the Co3+ ions, which possess six d-shall electrons and can form configurations with spins S=0, 1, or 2. In the prototypical member of the family, LaCoO3, the ground state is believed to be insulating with the spin state S=0. However, there has been a great deal of controversy over the last decades about the nature of the excited states and the phases observed at higher temperatures. The authors here approach this long-standing problem by applying ultrahigh magnetic fields reaching 133 Tesla at temperatures ranging from 2 to 120 K. Surprisingly, at magnetic fields above 100 T, they find two novel magnetic phases that are identified as spin-state crystalline states, possibly with some orbital ordering.

Low-energy excitations and ground-state selection in the quantum breathing pyrochlore antiferromagnet Ba3Yb2Zn5O11

T. Haku, K. Kimura, Y. Matsumoto, M. Soda, M. Sera, D. Yu, R. A. Mole, T. Takeuchi, S. Nakatsuji, Y. Kono, T. Sakakibara, L.-J. Chang, and T. Masuda

Phys. Rev. B 93, 220407(R) (2016) - Published 24 June, 2016

This study is motivated by a challenge to the third law of the thermodynamics: how does the degenerated ground state in a textbook example behave in a real compound? At very low temperatures, nature tries to preserve the basic law using small perturbations and a novel quantum state should appear. The authors here study the classic frustrated magnet Ba3Yb2Zn5O11, a spin tetrahedron having two-fold degeneracy realized in a breathing pyrochlore lattice. They measure by inelastic neutron scattering the low-energy excitations in order to identify the effective spin Hamiltonian and macroscopic properties at very low temperatures. They demonstrate how the degeneracy of the ground state is lifted and a unique quantum state is selected.

Spin-orbit coupling controlled ground state in Sr2ScOsO6

A. E. Taylor, R. Morrow, R. S. Fishman, S. Calder, A. I. Kolesnikov, M. D. Lumsden, P. M. Woodward, and A. D. Christianson

Phys. Rev. B 93, 220408(R) (2016) - Published 27 June, 2016

The role of spin-orbit coupling (SOC) in 4d and 5d transition metal oxides is relatively poorly understood outside of the LS or JJ coupling limits. In this work, the importance of the intermediate regime is demonstrated through the identification of SOC as an essential feature of the collective properties in nominally orbitally quenched 5d3 systems. The authors probe the magnetic excitations in model system Sr2ScOsO6 via inelastic neutron scattering and model the results including the effects of SOC-induced anisotropy. Experimentally determining the strengths of nearest and next-nearest neighbor interactions leads to the important discovery that the magnetic ground state is controlled by anisotropy, which would not be possible in the LS coupling limit. This indicates that SOC plays a key role in relieving frustration and promoting heightened transition temperatures in 5d3 double perovskites.

Magnetic diffuse scattering in artificial kagome spin ice

Oles Sendetskyi, Luca Anghinolfi, Valerio Scagnoli, Gunnar Möller, Naëmi Leo, Aurora Alberca, Joachim Kohlbrecher, Jan Lüning, Urs Staub, and Laura Jane Heyderman

Phys. Rev. B 93, 224413 (2016) - Published 13 June, 2016

Magnetic phases and phase transitions in artificial spin ice, constructed from tailor-made arrays of nanomagnets, are currently subjects of great interest. The authors present measurements of the diffuse soft x-ray resonant magnetic scattering in artificial spin ice, where the moments of the magnets, arranged on the sites of the kagome lattice, are highly dynamic. Comparing experimental scattering patterns with the patterns calculated from Monte Carlo simulations based on a needle-dipole model, they show the emergence of quasi-pinch-points in the kagome ice I phase, and explain their relation to the pinch-point singularities in spin ice pyrochlores. As in the bulk pyrochlore spin ices, measurement of diffuse scattering from artificial kagome spin ice provides unique information on the magnetic correlations and can be applied to a number of other problems concerning nanomagnetic systems.

Size dependence of nanosecond-scale spin-torque switching in perpendicularly magnetized tunnel junctions

T. Devolder, A. Le Goff, and V. Nikitin

Phys. Rev. B 93, 224432 (2016) - Published 28 June, 2016

Magnetic tunnel junctions are under active consideration owing to their applications including the potential next generations of spin transfer torque memories. In view of the high symmetry of the magnetic properties and of the high frequency of the system eigenexcitations, out-of-plane magnetized systems are thought to enable a faster and simpler spin-torque-induced switching process than the formerly used in-plane magnetized systems. Unfortunately, the lack of high frequency and low current switching experiments have precluded, so far, the assessment of the speed potential of perpendicular anisotropy systems at low junction dimensions. By time resolving the switching and evidencing its stochastic aspects at the nanosecond-scale, the authors here demonstrate that a complex dynamics happens and persists down to small sized elements with always a very strong asymmetry between the two switching directions. The reversal is explained by the complex interplay between the spatial profile of the stray field emanating from the fixed system of the tunnel junction and the constraint that the switching is preferably initiated from the device edge.

Electronic vortex structure of Fe-based superconductors: Application to LiFeAs

B. Mencia Uranga, Maria N. Gastiasoro, and Brian M. Andersen

Phys. Rev. B 93, 224503 (2016) - Published 2 June, 2016

The understanding of the microscopic origin of electron pairing in strongly correlated electron systems remains an ultimate goal in the field of unconventional superconductivity. Detailed tunneling spectroscopy of vortex core states can provide important insight to the momentum structure of the superconducting order parameter, which is closely related to the nature of the electron pairing. The authors performed a fully self-consistent real-space BdG study of vortex core states in five-orbital models relevant to Fe-based superconductors. The superconducting order was stabilized by spin fluctuation-derived pairing vertices generating an s±-wave gap structure. By application to LiFeAs, they find striking agreement with STS measurements by Hanaguri et al. on this compound. In particular, the details of the energy dependence and the spatial structure seems in almost quantitative agreement without any tuning parameters. From this fact they conclude that their model provides a reasonable description of LiFeAs, without the necessity to invoke more exotic paring states of this material.

RAPID COMMUNICATIONS

Structure, structural phase transitions, mechanical properties, defects

Quantum Hall realization of polarized intensity interferometry

Krishanu Roychowdhury, Disha Wadhawan, Poonam Mehta, Biswajit Karmakar, and Sourin Das

Phys. Rev. B 93, 220101(R) (2016) - Published 29 June, 2016

Dynamics, dynamical systems, lattice effects

Generation mechanism of terahertz coherent acoustic phonons in Fe

T. Henighan, M. Trigo, S. Bonetti, P. Granitzka, D. Higley, Z. Chen, M. P. Jiang, R. Kukreja, A. Gray, A. H. Reid, E. Jal, M. C. Hoffmann, M. Kozina, S. Song, M. Chollet, D. Zhu, P. F. Xu, J. Jeong, K. Carva, P. Maldonado, P. M. Oppeneer, M. G. Samant, S. S. P. Parkin, D. A. Reis, and H. A. Dürr

Phys. Rev. B 93, 220301(R) (2016) - Published 10 June, 2016

Magnetism

Spin state ordering of strongly correlating LaCoO3 induced at ultrahigh magnetic fields

Akihiko Ikeda, Toshihiro Nomura, Yasuhiro H. Matsuda, Akira Matsuo, Koichi Kindo, and Keisuke Sato

Phys. Rev. B 93, 220401(R) (2016) - Published 6 June, 2016

An additional degree of freedom in cobalt oxides that makes them fascinating is the spin state of the Co3+ ions, which possess six d-shall electrons and can form configurations with spins S=0, 1, or 2. In the prototypical member of the family, LaCoO3, the ground state is believed to be insulating with the spin state S=0. However, there has been a great deal of controversy over the last decades about the nature of the excited states and the phases observed at higher temperatures. The authors here approach this long-standing problem by applying ultrahigh magnetic fields reaching 133 Tesla at temperatures ranging from 2 to 120 K. Surprisingly, at magnetic fields above 100 T, they find two novel magnetic phases that are identified as spin-state crystalline states, possibly with some orbital ordering.

Nanometer-scale exchange interactions between spin centers in diamond

V. R. Kortan, C. Şahin, and M. E. Flatté

Phys. Rev. B 93, 220402(R) (2016) - Published 15 June, 2016

Electric-field-induced spin resonance in antiferromagnetic insulators: Inverse process of the dynamical chiral magnetic effect

Akihiko Sekine and Takahiro Chiba

Phys. Rev. B 93, 220403(R) (2016) - Published 17 June, 2016

Interpreting current-induced spin polarization in topological insulator surface states

Pengke Li (李鹏科) and Ian Appelbaum

Phys. Rev. B 93, 220404(R) (2016) - Published 20 June, 2016

Strong spin Hall effect in the antiferromagnet PtMn

Yongxi Ou, Shengjie Shi, D. C. Ralph, and R. A. Buhrman

Phys. Rev. B 93, 220405(R) (2016) - Published 20 June, 2016

Exchange interactions of magnetic surfaces below two-dimensional materials

Rico Friedrich, Vasile Caciuc, Nicolae Atodiresei, and Stefan Blügel

Phys. Rev. B 93, 220406(R) (2016) - Published 22 June, 2016

Low-energy excitations and ground-state selection in the quantum breathing pyrochlore antiferromagnet Ba3Yb2Zn5O11

T. Haku, K. Kimura, Y. Matsumoto, M. Soda, M. Sera, D. Yu, R. A. Mole, T. Takeuchi, S. Nakatsuji, Y. Kono, T. Sakakibara, L.-J. Chang, and T. Masuda

Phys. Rev. B 93, 220407(R) (2016) - Published 24 June, 2016

This study is motivated by a challenge to the third law of the thermodynamics: how does the degenerated ground state in a textbook example behave in a real compound? At very low temperatures, nature tries to preserve the basic law using small perturbations and a novel quantum state should appear. The authors here study the classic frustrated magnet Ba3Yb2Zn5O11, a spin tetrahedron having two-fold degeneracy realized in a breathing pyrochlore lattice. They measure by inelastic neutron scattering the low-energy excitations in order to identify the effective spin Hamiltonian and macroscopic properties at very low temperatures. They demonstrate how the degeneracy of the ground state is lifted and a unique quantum state is selected.

Spin-orbit coupling controlled ground state in Sr2ScOsO6

A. E. Taylor, R. Morrow, R. S. Fishman, S. Calder, A. I. Kolesnikov, M. D. Lumsden, P. M. Woodward, and A. D. Christianson

Phys. Rev. B 93, 220408(R) (2016) - Published 27 June, 2016

The role of spin-orbit coupling (SOC) in 4d and 5d transition metal oxides is relatively poorly understood outside of the LS or JJ coupling limits. In this work, the importance of the intermediate regime is demonstrated through the identification of SOC as an essential feature of the collective properties in nominally orbitally quenched 5d3 systems. The authors probe the magnetic excitations in model system Sr2ScOsO6 via inelastic neutron scattering and model the results including the effects of SOC-induced anisotropy. Experimentally determining the strengths of nearest and next-nearest neighbor interactions leads to the important discovery that the magnetic ground state is controlled by anisotropy, which would not be possible in the LS coupling limit. This indicates that SOC plays a key role in relieving frustration and promoting heightened transition temperatures in 5d3 double perovskites.

Superfluidity and superconductivity

Frequency-domain measurement of the spin-imbalance lifetime in superconductors

C. H. L. Quay, C. Dutreix, D. Chevallier, C. Bena, and M. Aprili

Phys. Rev. B 93, 220501(R) (2016) - Published 1 June, 2016

Enhancing triplet superconductivity by the proximity to a singlet superconductor in oxide heterostructures

Mats Horsdal, Giniyat Khaliullin, Timo Hyart, and Bernd Rosenow

Phys. Rev. B 93, 220502(R) (2016) - Published 6 June, 2016

Read-Green resonances in a topological superconductor coupled to a bath

Pieter W. Claeys, Stijn De Baerdemacker, and Dimitri Van Neck

Phys. Rev. B 93, 220503(R) (2016) - Published 9 June, 2016

Fully gapped superconductivity in the topological superconductor β−PdBi2

P. K. Biswas, D. G. Mazzone, R. Sibille, E. Pomjakushina, K. Conder, H. Luetkens, C. Baines, J. L. Gavilano, M. Kenzelmann, A. Amato, and E. Morenzoni

Phys. Rev. B 93, 220504(R) (2016) - Published 13 June, 2016

Critical temperature enhancement of topological superconductors: A dynamical mean-field study

Yuki Nagai, Shintaro Hoshino, and Yukihiro Ota

Phys. Rev. B 93, 220505(R) (2016) - Published 20 June, 2016

Scanning tunneling microscopy of superconducting topological surface states in Bi2Se3

Ian M. Dayton, Nicholas Sedlmayr, Victor Ramirez, Thomas C. Chasapis, Reza Loloee, Mercouri G. Kanatzidis, Alex Levchenko, and Stuart H. Tessmer

Phys. Rev. B 93, 220506(R) (2016) - Published 20 June, 2016

Signatures of topological phase transitions in Josephson current-phase discontinuities

Pasquale Marra, Roberta Citro, and Alessandro Braggio

Phys. Rev. B 93, 220507(R) (2016) - Published 20 June, 2016

ARTICLES

Structure, structural phase transitions, mechanical properties, defects

Transport properties of dilute α−Fe(X) solid solutions (X = C, N, O)

Thomas Schuler and Maylise Nastar

Phys. Rev. B 93, 224101 (2016) - Published 3 June, 2016

Quantum stability and magic lengths of metal atom wires

Ping Cui, Jin-Ho Choi, Haiping Lan, Jun-Hyung Cho, Qian Niu, Jinlong Yang, and Zhenyu Zhang

Phys. Rev. B 93, 224102 (2016) - Published 6 June, 2016

Hardening of the soft phonon in bulk SrTiO3 interfaced with LaAlO3 and SrRuO3

A. Nucara, M. Ortolani, L. Baldassarre, W. S. Mohamed, U. Schade, P. P. Aurino, A. Kalaboukhov, D. Winkler, A. Khare, F. Miletto Granozio, and P. Calvani

Phys. Rev. B 93, 224103 (2016) - Published 14 June, 2016

Layered structure and re-entrant disproportionation observed in crystalline BeH2 under pressure

Charles M. Pépin and Paul Loubeyre

Phys. Rev. B 93, 224104 (2016) - Published 15 June, 2016

BaZr0.5Ti0.5O3: Lead-free relaxor ferroelectric or dipolar glass

C. Filipič, Z. Kutnjak, R. Pirc, G. Canu, and J. Petzelt

Phys. Rev. B 93, 224105 (2016) - Published 15 June, 2016

Effect of composition on antiphase boundary energy in Ni3Al based alloys: Ab initio calculations

O. I. Gorbatov, I. L. Lomaev, Yu. N. Gornostyrev, A. V. Ruban, D. Furrer, V. Venkatesh, D. L. Novikov, and S. F. Burlatsky

Phys. Rev. B 93, 224106 (2016) - Published 20 June, 2016

Electronic characterization of polar nanoregions in relaxor-type ferroelectric NaNbO3 films

Biya Cai, J. Schwarzkopf, E. Hollmann, D. Braun, M. Schmidbauer, T. Grellmann, and R. Wördenweber

Phys. Rev. B 93, 224107 (2016) - Published 22 June, 2016

Disjoining potential and grain boundary premelting in binary alloys

J. Hickman and Y. Mishin

Phys. Rev. B 93, 224108 (2016) - Published 27 June, 2016

Atomic ordering in cubic bismuth telluride alloy phases at high pressure

I. Loa, J.-W. G. Bos, R. A. Downie, and K. Syassen

Phys. Rev. B 93, 224109 (2016) - Published 27 June, 2016

Dimensional transformation of defect-induced noise, dissipation, and nonlinearity

R. O. Behunin, F. Intravaia, and P. T. Rakich

Phys. Rev. B 93, 224110 (2016) - Published 28 June, 2016

β−Bi2O3 under compression: Optical and elastic properties and electron density topology analysis

A. L. J. Pereira, O. Gomis, J. A. Sans, J. Contreras-García, F. J. Manjón, P. Rodríguez-Hernández, A. Muñoz, and A. Beltrán

Phys. Rev. B 93, 224111 (2016) - Published 30 June, 2016

Inhomogeneous, disordered, and partially ordered systems

Many-body localization phase transition: A simplified strong-randomness approximate renormalization group

Liangsheng Zhang, Bo Zhao, Trithep Devakul, and David A. Huse

Phys. Rev. B 93, 224201 (2016) - Published 1 June, 2016

Applicability of effective medium description to photonic crystals in higher bands: Theory and numerical analysis

Vadim A. Markel and Igor Tsukerman

Phys. Rev. B 93, 224202 (2016) - Published 2 June, 2016

Competition between disorder and Coulomb interaction in a two-dimensional plaquette Hubbard model

Hunpyo Lee, Harald O. Jeschke, and Roser Valentí

Phys. Rev. B 93, 224203 (2016) - Published 13 June, 2016

Statistics of plastic events in post-yield strain-controlled amorphous solids

Awadhesh K. Dubey, H. George E. Hentschel, Itamar Procaccia, and Murari Singh

Phys. Rev. B 93, 224204 (2016) - Published 15 June, 2016

Spin transport of weakly disordered Heisenberg chain at infinite temperature

Ilia Khait, Snir Gazit, Norman Y. Yao, and Assa Auerbach

Phys. Rev. B 93, 224205 (2016) - Published 17 June, 2016

Spin-glass phase transition and behavior of nonlinear susceptibility in the Sherrington-Kirkpatrick model with random fields

C. V. Morais, F. M. Zimmer, M. J. Lazo, S. G. Magalhães, and F. D. Nobre

Phys. Rev. B 93, 224206 (2016) - Published 17 June, 2016

Dynamics, dynamical systems, lattice effects

Optic phonon bandwidth and lattice thermal conductivity: The case of Li2X (X=O, S, Se, Te)

S. Mukhopadhyay, L. Lindsay, and D. S. Parker

Phys. Rev. B 93, 224301 (2016) - Published 7 June, 2016

Velocity autocorrelation by quantum simulations for direct parameter-free computations of the neutron cross sections. II. Liquid deuterium

E. Guarini, M. Neumann, U. Bafile, M. Celli, D. Colognesi, S. Bellissima, E. Farhi, and Y. Calzavara

Phys. Rev. B 93, 224302 (2016) - Published 13 June, 2016

Polarized Raman spectroscopy of v−SiO2 under rare-gas compression

C. Weigel, M. Foret, B. Hehlen, M. Kint, S. Clément, A. Polian, R. Vacher, and B. Rufflé

Phys. Rev. B 93, 224303 (2016) - Published 20 June, 2016

High-resolution transient and permanent spectral hole burning in Ce3+:Y2SiO5 at liquid helium temperatures

Jenny Karlsson, Adam N. Nilsson, Diana Serrano, Andreas Walther, Philippe Goldner, Alban Ferrier, Lars Rippe, and Stefan Kröll

Phys. Rev. B 93, 224304 (2016) - Published 21 June, 2016

Theory of entropy production in quantum many-body systems

E. Solano-Carrillo and A. J. Millis

Phys. Rev. B 93, 224305 (2016) - Published 29 June, 2016

Magnetism

Anisotropic interactions opposing magnetocrystalline anisotropy in Sr3NiIrO6

E. Lefrançois, A.-M. Pradipto, M. Moretti Sala, L. C. Chapon, V. Simonet, S. Picozzi, P. Lejay, S. Petit, and R. Ballou

Phys. Rev. B 93, 224401 (2016) - Published 1 June, 2016

Umbrella-coplanar transition in the triangular XXZ model with arbitrary spin

Giacomo Marmorini, Daisuke Yamamoto, and Ippei Danshita

Phys. Rev. B 93, 224402 (2016) - Published 1 June, 2016

Pressure effect on the magnetism of the diluted magnetic semiconductor (Ba1−xKx)(Zn1−yMny)2As2 with independent spin and charge doping

F. Sun, N. N. Li, B. J. Chen, Y. T. Jia, L. J. Zhang, W. M. Li, G. Q. Zhao, L. Y. Xing, G. Fabbris, Y. G. Wang, Z. Deng, Y. J. Uemura, H. K. Mao, D. Haskel, W. G. Yang, and C. Q. Jin

Phys. Rev. B 93, 224403 (2016) - Published 3 June, 2016

Magnetic modeling and effect of biaxial strain on the Haldane chain compound SrNi2V2O8

Kartik Samanta, Satyaki Kar, and T. Saha-Dasgupta

Phys. Rev. B 93, 224404 (2016) - Published 6 June, 2016

Colossal negative thermal expansion induced by magnetic phase competition on frustrated lattices in Laves phase compound (Hf,Ta)Fe2

B. Li, X. H. Luo, H. Wang, W. J. Ren, S. Yano, C.-W. Wang, J. S. Gardner, K.-D. Liss, P. Miao, S.-H. Lee, T. Kamiyama, R. Q. Wu, Y. Kawakita, and Z. D. Zhang

Phys. Rev. B 93, 224405 (2016) - Published 6 June, 2016

Structural and magnetic characterization of the one-dimensional S=5/2 antiferromagnetic chain system SrMn(VO4)(OH)

Liurukara D. Sanjeewa, Vasile O. Garlea, Michael A. McGuire, Colin D. McMillen, Huibo Cao, and Joseph W. Kolis

Phys. Rev. B 93, 224407 (2016) - Published 6 June, 2016

Magnetic properties of ultrathin discontinuous Co/Pt multilayers: Comparison with short-range ordered and isotropic CoPt3 films

M. Charilaou, C. Bordel, P.-E. Berche, B. B. Maranville, P. Fischer, and F. Hellman

Phys. Rev. B 93, 224408 (2016) - Published 7 June, 2016

Probing the Pu4+ magnetic moment in PuF4 with F19 NMR spectroscopy

Cigdem Capan, Richard J. Dempsey, Sergey Sinkov, Bruce K. McNamara, and Herman Cho

Phys. Rev. B 93, 224409 (2016) - Published 8 June, 2016

Phase locking of spin-torque nano-oscillator pairs with magnetic dipolar coupling

Hao-Hsuan Chen, Ching-Ming Lee, Zongzhi Zhang, Yaowen Liu, Jong-Ching Wu, Lance Horng, and Ching-Ray Chang

Phys. Rev. B 93, 224410 (2016) - Published 8 June, 2016

Strong impact of lattice vibrations on electronic and magnetic properties of paramagnetic Fe revealed by disordered local moments molecular dynamics

B. Alling, F. Körmann, B. Grabowski, A. Glensk, I. A. Abrikosov, and J. Neugebauer

Phys. Rev. B 93, 224411 (2016) - Published 9 June, 2016

Distinct magnetic phases in structurally uniform SrCoO3−y

Z. H. Zhu, F. J. Rueckert, J. I. Budnick, W. A. Hines, Ch. Niedermayer, L. Keller, H. Luetkens, B. Dabrowski, S. Kolesnik, and B. O. Wells

Phys. Rev. B 93, 224412 (2016) - Published 13 June, 2016

Magnetic diffuse scattering in artificial kagome spin ice

Oles Sendetskyi, Luca Anghinolfi, Valerio Scagnoli, Gunnar Möller, Naëmi Leo, Aurora Alberca, Joachim Kohlbrecher, Jan Lüning, Urs Staub, and Laura Jane Heyderman

Phys. Rev. B 93, 224413 (2016) - Published 13 June, 2016

Magnetic phases and phase transitions in artificial spin ice, constructed from tailor-made arrays of nanomagnets, are currently subjects of great interest. The authors present measurements of the diffuse soft x-ray resonant magnetic scattering in artificial spin ice, where the moments of the magnets, arranged on the sites of the kagome lattice, are highly dynamic. Comparing experimental scattering patterns with the patterns calculated from Monte Carlo simulations based on a needle-dipole model, they show the emergence of quasi-pinch-points in the kagome ice I phase, and explain their relation to the pinch-point singularities in spin ice pyrochlores. As in the bulk pyrochlore spin ices, measurement of diffuse scattering from artificial kagome spin ice provides unique information on the magnetic correlations and can be applied to a number of other problems concerning nanomagnetic systems.

Bond chaos in spin glasses revealed through thermal boundary conditions

Wenlong Wang, Jonathan Machta, and Helmut G. Katzgraber

Phys. Rev. B 93, 224414 (2016) - Published 13 June, 2016

Instabilities of spin torque driven auto-oscillations of a ferromagnetic disk magnetized in plane

D. Mancilla-Almonacid and R. E. Arias

Phys. Rev. B 93, 224416 (2016) - Published 16 June, 2016

Tunable crossover between one- and three-dimensional magnetic dynamics in CoII single-chain magnets organized by halogen bonding

A. Amjad, J. M. Clemente-Juan, E. Coronado, F. Luis, M. Evangelisti, G. Mínguez Espallargas, and E. del Barco

Phys. Rev. B 93, 224418 (2016) - Published 20 June, 2016

Interface-driven spin-torque ferromagnetic resonance by Rashba coupling at the interface between nonmagnetic materials

M. B. Jungfleisch, W. Zhang, J. Sklenar, W. Jiang, J. E. Pearson, J. B. Ketterson, and A. Hoffmann

Phys. Rev. B 93, 224419 (2016) - Published 20 June, 2016

Spin-orbit torques and spin accumulation in FePt/Pt and Co/Cu thin films from first principles: The role of impurities

Guillaume Géranton, Bernd Zimmermann, Nguyen H. Long, Phivos Mavropoulos, Stefan Blügel, Frank Freimuth, and Yuriy Mokrousov

Phys. Rev. B 93, 224420 (2016) - Published 21 June, 2016

Transformation of spin current by antiferromagnetic insulators

Roman Khymyn, Ivan Lisenkov, Vasil S. Tiberkevich, Andrei N. Slavin, and Boris A. Ivanov

Phys. Rev. B 93, 224421 (2016) - Published 22 June, 2016

Critical behavior of the two-dimensional Ising model with long-range correlated disorder

M. Dudka, A. A. Fedorenko, V. Blavatska, and Yu. Holovatch

Phys. Rev. B 93, 224422 (2016) - Published 22 June, 2016

Ferromagnetic resonance and resonance modes in kagome lattices: From an open to a closed kagome structure

J. Dubowik, P. Kuświk, M. Matczak, W. Bednarski, F. Stobiecki, P. Aleshkevych, H. Szymczak, M. Kisielewski, and J. Kisielewski

Phys. Rev. B 93, 224423 (2016) - Published 22 June, 2016

Low-temperature and high-pressure µSR study of the strongly correlated CeNiSnHx compounds

O. Isnard, C. Rusu, R. Dudric, D. Andreica, A. Amato, and B. Chevalier

Phys. Rev. B 93, 224424 (2016) - Published 23 June, 2016

Calculation of the magnetic anisotropy with projected-augmented-wave methodology and the case study of disordered Fe1−xCox alloys

Soner Steiner, Sergii Khmelevskyi, Martijn Marsmann, and Georg Kresse

Phys. Rev. B 93, 224425 (2016) - Published 23 June, 2016

Theoretical study of interfacial damping in perpendicular anisotropy superlattices along multiple crystal orientations

T. Qu and R. H. Victora

Phys. Rev. B 93, 224426 (2016) - Published 27 June, 2016

Twist in the bias dependence of spin torques in magnetic tunnel junctions

Sören Boyn, João Sampaio, Vincent Cros, Julie Grollier, Akio Fukushima, Hitoshi Kubota, Kay Yakushiji, and Shinji Yuasa

Phys. Rev. B 93, 224427 (2016) - Published 27 June, 2016

Correlation effects and orbital magnetism of Co clusters

L. Peters, I. Di Marco, O. Grånäs, E. Şaşıoğlu, A. Altun, S. Rossen, C. Friedrich, S. Blügel, M. I. Katsnelson, A. Kirilyuk, and O. Eriksson

Phys. Rev. B 93, 224428 (2016) - Published 27 June, 2016

Second-order magnetic critical points at finite magnetic fields: Revisiting Arrott plots

S. Bustingorry, F. Pomiro, G. Aurelio, and J. Curiale

Phys. Rev. B 93, 224429 (2016) - Published 27 June, 2016

Spin Seebeck effect at microwave frequencies

Michael Schreier, Franz Kramer, Hans Huebl, Stephan Geprägs, Rudolf Gross, Sebastian T. B. Goennenwein, Timo Noack, Thomas Langner, Alexander A. Serga, Burkard Hillebrands, and Vitaliy I. Vasyuchka

Phys. Rev. B 93, 224430 (2016) - Published 28 June, 2016

Quantum annealing speedup over simulated annealing on random Ising chains

Tommaso Zanca and Giuseppe E. Santoro

Phys. Rev. B 93, 224431 (2016) - Published 28 June, 2016

Size dependence of nanosecond-scale spin-torque switching in perpendicularly magnetized tunnel junctions

T. Devolder, A. Le Goff, and V. Nikitin

Phys. Rev. B 93, 224432 (2016) - Published 28 June, 2016

Magnetic tunnel junctions are under active consideration owing to their applications including the potential next generations of spin transfer torque memories. In view of the high symmetry of the magnetic properties and of the high frequency of the system eigenexcitations, out-of-plane magnetized systems are thought to enable a faster and simpler spin-torque-induced switching process than the formerly used in-plane magnetized systems. Unfortunately, the lack of high frequency and low current switching experiments have precluded, so far, the assessment of the speed potential of perpendicular anisotropy systems at low junction dimensions. By time resolving the switching and evidencing its stochastic aspects at the nanosecond-scale, the authors here demonstrate that a complex dynamics happens and persists down to small sized elements with always a very strong asymmetry between the two switching directions. The reversal is explained by the complex interplay between the spatial profile of the stray field emanating from the fixed system of the tunnel junction and the constraint that the switching is preferably initiated from the device edge.

Comparison of laser-induced and intrinsic tunnel magneto-Seebeck effect in CoFeB/MgAl2O4 and CoFeB/MgO magnetic tunnel junctions

Torsten Huebner, Alexander Boehnke, Ulrike Martens, Andy Thomas, Jan-Michael Schmalhorst, Günter Reiss, Markus Münzenberg, and Timo Kuschel

Phys. Rev. B 93, 224433 (2016) - Published 30 June, 2016

Superfluidity and superconductivity

Optimal boson energy for superconductivity in the Holstein model

Chungwei Lin, Bingnan Wang, and Koon Hoo Teo

Phys. Rev. B 93, 224501 (2016) - Published 1 June, 2016

Magnetic dipoles at topological defects in the Meissner state of a nanostructured superconductor

Jun-Yi Ge, Vladimir N. Gladilin, Cun Xue, Jacques Tempere, Jozef T. Devreese, Joris Van de Vondel, Youhe Zhou, and Victor V. Moshchalkov

Phys. Rev. B 93, 224502 (2016) - Published 2 June, 2016

Electronic vortex structure of Fe-based superconductors: Application to LiFeAs

B. Mencia Uranga, Maria N. Gastiasoro, and Brian M. Andersen

Phys. Rev. B 93, 224503 (2016) - Published 2 June, 2016

The understanding of the microscopic origin of electron pairing in strongly correlated electron systems remains an ultimate goal in the field of unconventional superconductivity. Detailed tunneling spectroscopy of vortex core states can provide important insight to the momentum structure of the superconducting order parameter, which is closely related to the nature of the electron pairing. The authors performed a fully self-consistent real-space BdG study of vortex core states in five-orbital models relevant to Fe-based superconductors. The superconducting order was stabilized by spin fluctuation-derived pairing vertices generating an s±-wave gap structure. By application to LiFeAs, they find striking agreement with STS measurements by Hanaguri et al. on this compound. In particular, the details of the energy dependence and the spatial structure seems in almost quantitative agreement without any tuning parameters. From this fact they conclude that their model provides a reasonable description of LiFeAs, without the necessity to invoke more exotic paring states of this material.

Vortex crossing, trapping, and pinning in superconducting nanowires of a NbSe2 two-dimensional crystal

Shaun A. Mills, Jacob J. Wisser, Chenyi Shen, Zhuan Xu, and Ying Liu

Phys. Rev. B 93, 224504 (2016) - Published 2 June, 2016

Majorana bound states in magnetic skyrmions

Guang Yang, Peter Stano, Jelena Klinovaja, and Daniel Loss

Phys. Rev. B 93, 224505 (2016) - Published 3 June, 2016

Charge transfer and electron-phonon coupling in monolayer FeSe on Nb-doped SrTiO3

Yuanjun Zhou and Andrew J. Millis

Phys. Rev. B 93, 224506 (2016) - Published 6 June, 2016

Superconductivity in magnetic multipole states

Shuntaro Sumita and Youichi Yanase

Phys. Rev. B 93, 224507 (2016) - Published 7 June, 2016

Impurity scattering effects on the superconducting properties and the tetragonal-to-orthorhombic phase transition in FeSe

M. Abdel-Hafiez, Y. J. Pu, J. Brisbois, R. Peng, D. L. Feng, D. A. Chareev, A. V. Silhanek, C. Krellner, A. N. Vasiliev, and Xiao-Jia Chen

Phys. Rev. B 93, 224508 (2016) - Published 8 June, 2016

Spin caloritronics with superconductors: Enhanced thermoelectric effects, generalized Onsager response-matrix, and thermal spin currents

Jacob Linder and Marianne Etzelmüller Bathen

Phys. Rev. B 93, 224509 (2016) - Published 8 June, 2016

Magnetic field oscillations of the critical current in long ballistic graphene Josephson junctions

Péter Rakyta, Andor Kormányos, and József Cserti

Phys. Rev. B 93, 224510 (2016) - Published 8 June, 2016

Tunneling and Josephson effects in odd-frequency superconductor junctions: A study on multichannel Kondo chain

Shintaro Hoshino, Keiji Yada, and Yukio Tanaka

Phys. Rev. B 93, 224511 (2016) - Published 13 June, 2016

Proximity-induced superconductivity within the insulating (Li0.84Fe0.16)OH layers in (Li0.84Fe0.16)OHFe0.98Se

Rustem Khasanov, Huaxue Zhou, Alex Amato, Zurab Guguchia, Elvezio Morenzoni, Xiaoli Dong, Guangming Zhang, and Zhongxian Zhao

Phys. Rev. B 93, 224512 (2016) - Published 15 June, 2016

First-principles demonstration of superconductivity at 280 K in hydrogen sulfide with low phosphorus substitution

Yanfeng Ge, Fan Zhang, and Yugui Yao

Phys. Rev. B 93, 224513 (2016) - Published 16 June, 2016

Robustness of quantum critical pairing against disorder

Jian Kang and Rafael M. Fernandes

Phys. Rev. B 93, 224514 (2016) - Published 16 June, 2016

Interband coupling and nonmagnetic interband scattering in ±s superconductors

V. G. Kogan and R. Prozorov

Phys. Rev. B 93, 224515 (2016) - Published 17 June, 2016

Possible superconducting fluctuation and pseudogap state above Tc in CsFe2As2

Huan Yang, Jie Xing, Zengyi Du, Xiong Yang, Hai Lin, Delong Fang, Xiyu Zhu, and Hai-Hu Wen

Phys. Rev. B 93, 224516 (2016) - Published 21 June, 2016

Persistence of slow fluctuations in the overdoped regime of Ba(Fe1−xRhx)2As2 superconductors

L. Bossoni, M. Moroni, M. H. Julien, H. Mayaffre, P. C. Canfield, A. Reyes, W. P. Halperin, and P. Carretta

Phys. Rev. B 93, 224517 (2016) - Published 23 June, 2016

Quartz-superconductor quantum electromechanical system

M. J. Woolley, M. F. Emzir, G. J. Milburn, M. Jerger, M. Goryachev, M. E. Tobar, and A. Fedorov

Phys. Rev. B 93, 224518 (2016) - Published 28 June, 2016

On-site attractive multiorbital Hamiltonian for d-wave superconductors

Christopher B. Bishop, Guangkun Liu, Elbio Dagotto, and Adriana Moreo

Phys. Rev. B 93, 224519 (2016) - Published 29 June, 2016

Real-time measurement of the emergence of superconducting order in a high-temperature superconductor

I. Madan, P. Kusar, V. V. Baranov, M. Lu-Dac, V. V. Kabanov, T. Mertelj, and D. Mihailovic

Phys. Rev. B 93, 224520 (2016) - Published 30 June, 2016

Microwave quantum refrigeration based on the Josephson effect

Paolo Solinas, Riccardo Bosisio, and Francesco Giazotto

Phys. Rev. B 93, 224521 (2016) - Published 30 June, 2016

Restoring interlayer Josephson coupling in La1.885Ba0.115CuO4 by charge transfer melting of stripe order

V. Khanna, R. Mankowsky, M. Petrich, H. Bromberger, S. A. Cavill, E. Möhr-Vorobeva, D. Nicoletti, Y. Laplace, G. D. Gu, J. P. Hill, M. Först, A. Cavalleri, and S. S. Dhesi

Phys. Rev. B 93, 224522 (2016) - Published 30 June, 2016

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