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HIGHLIGHTED ARTICLES

Snowflake phononic topological insulator at the nanoscale

Christian Brendel, Vittorio Peano, Oskar Painter, and Florian Marquardt

Phys. Rev. B 97, 020102(R) (2018) - Published 18 January, 2018

The authors propose here the first experimentally viable scheme of a topological insulator for sound waves at the nanoscale. This significantly advances the field of nanoscale phononics, adding helical waveguides to its toolbox. The proposed device could hardly be simpler as it relies purely on a geometrical design, based on the “snowflake” phononic crystal that has already been demonstrated experimentally.

Direct evidence for cycloidal modulations in the thermal-fluctuation-stabilized spin spiral and skyrmion states of GaV4S8

J. S. White, Á. Butykai, R. Cubitt, D. Honecker, C. D. Dewhurst, L. F. Kiss, V. Tsurkan, and S. Bordács

Phys. Rev. B 97, 020401(R) (2018) - Published 5 January, 2018

It was recently proposed that multiferroic GaV4S8 hosts a new Néel-type of magnetic skyrmion lattice in its bulk, though direct microscopic experimental evidence of this type of skyrmion state has been absent up to now. By using polarized small-angle neutron scattering, the authors show unambiguously that the spins twist cycloidally in all modulated phases of GaV4S8, consistent with that expected for Néel-type skyrmions. In a further contrast to any other skyrmion host material, all of the spiral and skyrmion phases in GaV4S8 are shown to be stable only at finite temperature due to a delicate interplay between thermal agitation and a strong magnetic anisotropy.

Energetics of oxygen-octahedra rotations in perovskite oxides from first principles

Peng Chen, Mathieu N. Grisolia, Hong Jian Zhao, Otto E. González-Vázquez, L. Bellaiche, Manuel Bibes, Bang-Gui Liu, and Jorge Íñiguez

Phys. Rev. B 97, 024113 (2018) - Published 26 January, 2018

From superconductivity to magnetoelectricity, perovskite oxides exhibit a wealth of appealing physical properties, often controlled by subtle structural details. Especially critical are the ‘tilt’ distortion modes involving rotations of the oxygen octahedra that constitute the backbone of the perovskite lattice, which motivates today’s interest in better understanding and tuning such tilts. Here, the authors present a thorough first-principles investigation of the energy landscape relevant to this matter, revealing the main competitors among different tilt modes as well as their trends across the perovskite family.

Effect of applied orthorhombic lattice distortion on the antiferromagnetic phase of CeAuSb2

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

Phys. Rev. B 97, 024411 (2018) - Published 11 January, 2018

Lattice symmetry is important for classifying ordered phases in solids, but can it have consequences for the energetics of phase formation? In the heavy-fermion antiferromagnet CeAuSb2, it does. The unstressed lattice is tetragonal, and an orthorhombic distortion can be created through in-plane uniaxial pressure. For small distortions, the Néel transition is hardly affected, since the tetragonal lattice symmetry provides an energetic stabilization of the magnetic order. When the applied orthorhombicity exceeds a threshold, however, the transition splits into two transitions, and the order changes qualitatively.

Theory of the magnetic skyrmion glass

Shintaro Hoshino and Naoto Nagaosa

Phys. Rev. B 97, 024413 (2018) - Published 16 January, 2018

Magnetic skyrmions discovered in chiral magnets show unique physical properties due to their nontrivial topology. While their basic properties have been well understood for pure systems, in real materials there is always disorder from, for example, crystal defects or impurities. This glassy nature substantially modifies the low-energy behavior, and hence the investigation of the skyrmion glass is crucial to understanding real materials. Here, the authors theoretically study disordered chiral magnets in terms of replica field theory, and provide a firm basis to explore the glassy state of magnetic skyrmions.

Origin of the net magnetic moment in LaCoO3

G. M. Kaminsky, D. P. Belanger, F. Ye, J. A. Fernandez-Baca, J. Wang, M. Matsuda, and J.-Q. Yan

Phys. Rev. B 97, 024418 (2018) - Published 19 January, 2018

The authors here combine polarized neutron scattering experimental work with computational minimization of proposed Hamiltonians in an effort to understand the low-temperature magnetic behavior in small applied magnetic fields for LaCoO3. They provide an exceptionally comprehensive study of the phase diagrams generated by various Hamiltonians germane to a situation in which magnetic ordering occurs at twin boundaries due to antiferromagnetic chains crossing the boundary at an angle different than 90°.

Multispin-assisted optical pumping of bulk C13 nuclear spin polarization in diamond

Daniela Pagliero, K. R. Koteswara Rao, Pablo R. Zangara, Siddharth Dhomkar, Henry H. Wong, Andrea Abril, Nabeel Aslam, Anna Parker, Jonathan King, Claudia E. Avalos, Ashok Ajoy, Joerg Wrachtrup, Alexander Pines, and Carlos A. Meriles

Phys. Rev. B 97, 024422 (2018) - Published 22 January, 2018

The nitrogen-vacancy (NV) center in diamond is known to spin-polarize under optical illumination, but how is this polarization transferred to carbon spins in the bulk of the crystal? Here, the authors use field-cycled nuclear magnetic resonance to study the formation of light-driven 13C spin polarization in NV-rich diamond at room temperature. By considering the system’s response to various magnetic fields, it is shown that 13C spins polarize via a cross-relaxation process involving the NV center and the electron and nuclear spins of the substitutional nitrogen impurities. Furthermore, it is shown that high levels of 13C spin polarization can be attained for almost any magnetic field orientation.

Direct measurement of the static and transient magneto-optical permittivity of cobalt across the entire M-edge in reflection geometry by use of polarization scanning

Dmitriy Zusin, Phoebe M. Tengdin, Maithreyi Gopalakrishnan, Christian Gentry, Adam Blonsky, Michael Gerrity, Dominik Legut, Justin M. Shaw, Hans T. Nembach, T. J. Silva, Peter M. Oppeneer, Henry C. Kapteyn, and Margaret M. Murnane

Phys. Rev. B 97, 024433 (2018) - Published 30 January, 2018

It has long been known that the magnetic order in a material can be transiently disrupted by an intense laser pulse, on surprisingly fast sub-picosecond timescales. However, two decades after its discovery, the microscopic physics underlying this behavior is still not completely understood. Here, the authors develop a new extreme ultraviolet (EUV) magneto-optical spectroscopy that allows them to extract the full dynamic complex magneto-optical permittivity of a material. By exciting a Co film with a femtosecond laser pulse, and then scanning both the polarization and arrival time of a high-harmonic probe beam, they extract the instantaneous complex magneto-optical constant of Co across the M2,3 absorption edge. Through a direct comparison with ab initio theory, they show that the observed demagnetization is dominated by the excitation of magnons, with a possible small contribution from a reduction of the exchange splitting. This work further demonstrates the deepened insight on magnetism obtained through the recent application of tabletop-scale femtosecond EUV light sources.

RAPID COMMUNICATIONS

Structure, structural phase transitions, mechanical properties, defects

Topological dynamics of vortex-line networks in hexagonal manganites

Fei Xue, Nan Wang, Xueyun Wang, Yanzhou Ji, Sang-Wook Cheong, and Long-Qing Chen

Phys. Rev. B 97, 020101(R) (2018) - Published 16 January, 2018

Snowflake phononic topological insulator at the nanoscale

Christian Brendel, Vittorio Peano, Oskar Painter, and Florian Marquardt

Phys. Rev. B 97, 020102(R) (2018) - Published 18 January, 2018

The authors propose here the first experimentally viable scheme of a topological insulator for sound waves at the nanoscale. This significantly advances the field of nanoscale phononics, adding helical waveguides to its toolbox. The proposed device could hardly be simpler as it relies purely on a geometrical design, based on the “snowflake” phononic crystal that has already been demonstrated experimentally.

Structural phases arising from reconstructive and isostructural transitions in high-melting-point oxides under hydrostatic pressure: A first-principles study

Hao Tian, Xiao-Yu Kuang, Ai-Jie Mao, Yurong Yang, Changsong Xu, S. Omid Sayedaghaee, and L. Bellaiche

Phys. Rev. B 97, 020103(R) (2018) - Published 30 January, 2018

Competition between spin-orbit coupling, magnetism, and dimerization in the honeycomb iridates: αLi2IrO3 under pressure

V. Hermann, M. Altmeyer, J. Ebad-Allah, F. Freund, A. Jesche, A. A. Tsirlin, M. Hanfland, P. Gegenwart, I. I. Mazin, D. I. Khomskii, R. Valentí, and C. A. Kuntscher

Phys. Rev. B 97, 020104(R) (2018) - Published 31 January, 2018

Dynamics, dynamical systems, lattice effects

Quantum jumps on Anderson attractors

I. I. Yusipov, T. V. Laptyeva, and M. V. Ivanchenko

Phys. Rev. B 97, 020301(R) (2018) - Published 11 January, 2018

Understanding photon sideband statistics and correlation for determining phonon coherence

Ding Ding, Xiaobo Yin, and Baowen Li

Phys. Rev. B 97, 020302(R) (2018) - Published 18 January, 2018

Periodic and quasiperiodic revivals in periodically driven interacting quantum systems

David J. Luitz, Achilleas Lazarides, and Yevgeny Bar Lev

Phys. Rev. B 97, 020303(R) (2018) - Published 22 January, 2018

Magnetism

Direct evidence for cycloidal modulations in the thermal-fluctuation-stabilized spin spiral and skyrmion states of GaV4S8

J. S. White, Á. Butykai, R. Cubitt, D. Honecker, C. D. Dewhurst, L. F. Kiss, V. Tsurkan, and S. Bordács

Phys. Rev. B 97, 020401(R) (2018) - Published 5 January, 2018

It was recently proposed that multiferroic GaV4S8 hosts a new Néel-type of magnetic skyrmion lattice in its bulk, though direct microscopic experimental evidence of this type of skyrmion state has been absent up to now. By using polarized small-angle neutron scattering, the authors show unambiguously that the spins twist cycloidally in all modulated phases of GaV4S8, consistent with that expected for Néel-type skyrmions. In a further contrast to any other skyrmion host material, all of the spiral and skyrmion phases in GaV4S8 are shown to be stable only at finite temperature due to a delicate interplay between thermal agitation and a strong magnetic anisotropy.

Controlling chiral domain walls in antiferromagnets using spin-wave helicity

Alireza Qaiumzadeh, Lars A. Kristiansen, and Arne Brataas

Phys. Rev. B 97, 020402(R) (2018) - Published 9 January, 2018

Influence of the magnetic proximity effect on spin-orbit torque efficiencies in ferromagnet/platinum bilayers

T. A. Peterson, A. P. McFadden, C. J. Palmstrøm, and P. A. Crowell

Phys. Rev. B 97, 020403(R) (2018) - Published 10 January, 2018

Manipulating the magnetoelectric effect: Essence learned from Co4Nb2O9

Yuki Yanagi, Satoru Hayami, and Hiroaki Kusunose

Phys. Rev. B 97, 020404(R) (2018) - Published 10 January, 2018

Effect of the Magnus force on skyrmion relaxation dynamics

Barton L. Brown, Uwe C. Täuber, and Michel Pleimling

Phys. Rev. B 97, 020405(R) (2018) - Published 10 January, 2018

Neutron diffractive imaging of the skyrmion lattice nucleation in MnSi

T. Reimann, A. Bauer, C. Pfleiderer, P. Böni, P. Trtik, A. Tremsin, M. Schulz, and S. Mühlbauer

Phys. Rev. B 97, 020406(R) (2018) - Published 12 January, 2018

Weak localization of magnons in a disordered two-dimensional antiferromagnet

Naoya Arakawa and Jun-ichiro Ohe

Phys. Rev. B 97, 020407(R) (2018) - Published 25 January, 2018

Evidence for the role of the magnon energy relaxation length in the spin Seebeck effect

Arati Prakash, Benedetta Flebus, Jack Brangham, Fengyuan Yang, Yaroslav Tserkovnyak, and Joseph P. Heremans

Phys. Rev. B 97, 020408(R) (2018) - Published 29 January, 2018

Superfluidity and superconductivity

From a semimetal to a chiral Fulde-Ferrell superfluid

Ting Fung Jeffrey Poon and Xiong-Jun Liu

Phys. Rev. B 97, 020501(R) (2018) - Published 3 January, 2018

Nodeless superconductivity and time-reversal symmetry breaking in the noncentrosymmetric superconductor Re24Ti5

T. Shang, G. M. Pang, C. Baines, W. B. Jiang, W. Xie, A. Wang, M. Medarde, E. Pomjakushina, M. Shi, J. Mesot, H. Q. Yuan, and T. Shiroka

Phys. Rev. B 97, 020502(R) (2018) - Published 9 January, 2018

Rapid suppression of the charge density wave in YBa2Cu3O6.6 under hydrostatic pressure

S. M. Souliou, H. Gretarsson, G. Garbarino, A. Bosak, J. Porras, T. Loew, B. Keimer, and M. Le Tacon

Phys. Rev. B 97, 020503(R) (2018) - Published 16 January, 2018

Scaling universality at the dynamic vortex Mott transition

M. Lankhorst, N. Poccia, M. P. Stehno, A. Galda, H. Barman, F. Coneri, H. Hilgenkamp, A. Brinkman, A. A. Golubov, V. Tripathi, T. I. Baturina, and V. M. Vinokur

Phys. Rev. B 97, 020504(R) (2018) - Published 17 January, 2018

Transient electronic anisotropy in overdoped NaFe1xCoxAs superconductors

Shenghua Liu, Chunfeng Zhang, Qiang Deng, Hai-hu Wen, Jian-xin Li, Elbert E. M. Chia, Xiaoyong Wang, and Min Xiao

Phys. Rev. B 97, 020505(R) (2018) - Published 19 January, 2018

Coupled dipole oscillations of a mass-imbalanced Bose-Fermi superfluid mixture

Yu-Ping Wu, Xing-Can Yao, Xiang-Pei Liu, Xiao-Qiong Wang, Yu-Xuan Wang, Hao-Ze Chen, Youjin Deng, Yu-Ao Chen, and Jian-Wei Pan

Phys. Rev. B 97, 020506(R) (2018) - Published 22 January, 2018

Disordered Berezinskii-Kosterlitz-Thouless transition and superinsulation

S. Sankar, V. M. Vinokur, and V. Tripathi

Phys. Rev. B 97, 020507(R) (2018) - Published 22 January, 2018

High-Tc superconductivity up to 55 K under high pressure in a heavily electron doped Li0.36(NH3)yFe2Se2 single crystal

P. Shahi, J. P. Sun, S. H. Wang, Y. Y. Jiao, K. Y. Chen, S. S. Sun, H. C. Lei, Y. Uwatoko, B. S. Wang, and J.-G. Cheng

Phys. Rev. B 97, 020508(R) (2018) - Published 22 January, 2018

AC magnetic-field response of the ferromagnetic superconductor UGe2 with different magnetized states

Hiroyuki Tanaka, Akira Yamaguchi, Ikuto Kawasaki, Akihiko Sumiyama, Gaku Motoyama, and Tomoo Yamamura

Phys. Rev. B 97, 020509(R) (2018) - Published 29 January, 2018

Collapsed tetragonal phase as a strongly covalent and fully nonmagnetic state: Persistent magnetism with interlayer As–As bond formation in Rh-doped Ca0.8Sr0.2Fe2As2

K. Zhao, J. K. Glasbrenner, H. Gretarsson, D. Schmitz, J. Bednarcik, M. Etter, J. P. Sun, R. S. Manna, A. Al-Zein, S. Lafuerza, W. Scherer, J. G. Cheng, and P. Gegenwart

Phys. Rev. B 97, 020510(R) (2018) - Published 31 January, 2018

ARTICLES

Structure, structural phase transitions, mechanical properties, defects

Defect-driven flexochemical coupling in thin ferroelectric films

Eugene A. Eliseev, Ivan S. Vorotiahin, Yevhen M. Fomichov, Maya D. Glinchuk, Sergei V. Kalinin, Yuri A. Genenko, and Anna N. Morozovska

Phys. Rev. B 97, 024102 (2018) - Published 5 January, 2018

Pressure-induced irreversible metallization accompanying the phase transitions in Sb2S3

Lidong Dai, Kaixiang Liu, Heping Li, Lei Wu, Haiying Hu, Yukai Zhuang, Linfei Yang, Chang Pu, and Pengfei Liu

Phys. Rev. B 97, 024103 (2018) - Published 8 January, 2018

Phase transformation pathways of ultrafast-laser-irradiated Ln2O3(Ln=ErLu)

Dylan R. Rittman, Cameron L. Tracy, Chien-Hung Chen, Jonathan M. Solomon, Mark Asta, Wendy L. Mao, Steven M. Yalisove, and Rodney C. Ewing

Phys. Rev. B 97, 024104 (2018) - Published 10 January, 2018

Nitrogen-vacancy ensemble magnetometry based on pump absorption

Sepehr Ahmadi, Haitham A. R. El-Ella, Adam M. Wojciechowski, Tobias Gehring, Jørn O. B. Hansen, Alexander Huck, and Ulrik L. Andersen

Phys. Rev. B 97, 024105 (2018) - Published 11 January, 2018

Thermodynamically complete equation of state of MgO from true radiative shock temperature measurements on samples preheated to 1850 K

O. V. Fat'yanov, P. D. Asimow, and T. J. Ahrens

Phys. Rev. B 97, 024106 (2018) - Published 16 January, 2018

High-pressure phases of VO2 from the combination of Raman scattering and ab initio structural search

Victor Balédent, Tiago T. F. Cerqueira, Rafael Sarmiento-Pérez, Abhay Shukla, Christophe Bellin, Marino Marsi, Jean-Paul Itié, Matteo Gatti, Miguel A. L. Marques, Silvana Botti, and Jean-Pascal Rueff

Phys. Rev. B 97, 024107 (2018) - Published 17 January, 2018

Nature of the octahedral tilting phase transitions in perovskites: A case study of CaMnO3

Johan Klarbring and Sergei I. Simak

Phys. Rev. B 97, 024108 (2018) - Published 17 January, 2018

Quantum magnetomechanics: Towards the ultrastrong coupling regime

E. Romero-Sánchez, W. P. Bowen, M. R. Vanner, K. Xia, and J. Twamley

Phys. Rev. B 97, 024109 (2018) - Published 19 January, 2018

Tuning the ferroelectric-to-paraelectric transition temperature and dipole orientation of group-IV monochalcogenide monolayers

Salvador Barraza-Lopez, Thaneshwor P. Kaloni, Shiva P. Poudel, and Pradeep Kumar

Phys. Rev. B 97, 024110 (2018) - Published 22 January, 2018

Formation of H2-rich iodine-hydrogen compounds at high pressure

Jack Binns, Philip Dalladay-Simpson, Mengnan Wang, Graeme J. Ackland, Eugene Gregoryanz, and Ross T. Howie

Phys. Rev. B 97, 024111 (2018) - Published 24 January, 2018

Neural-network-based depth-resolved multiscale structural optimization using density functional theory and electron diffraction data

Robert S. Pennington, Catalina Coll, Sònia Estradé, Francesca Peiró, and Christoph T. Koch

Phys. Rev. B 97, 024112 (2018) - Published 24 January, 2018

Energetics of oxygen-octahedra rotations in perovskite oxides from first principles

Peng Chen, Mathieu N. Grisolia, Hong Jian Zhao, Otto E. González-Vázquez, L. Bellaiche, Manuel Bibes, Bang-Gui Liu, and Jorge Íñiguez

Phys. Rev. B 97, 024113 (2018) - Published 26 January, 2018

From superconductivity to magnetoelectricity, perovskite oxides exhibit a wealth of appealing physical properties, often controlled by subtle structural details. Especially critical are the ‘tilt’ distortion modes involving rotations of the oxygen octahedra that constitute the backbone of the perovskite lattice, which motivates today’s interest in better understanding and tuning such tilts. Here, the authors present a thorough first-principles investigation of the energy landscape relevant to this matter, revealing the main competitors among different tilt modes as well as their trends across the perovskite family.

High-throughput first-principles search for new ferroelectrics

Kevin F. Garrity

Phys. Rev. B 97, 024115 (2018) - Published 31 January, 2018

Raman scattering study of the ferroelectric phase transition in BaTi2O5

Shinya Tsukada, Yasuhiro Fujii, Yasuhiro Yoneda, Hiroki Moriwake, Ayako Konishi, and Yukikuni Akishige

Phys. Rev. B 97, 024116 (2018) - Published 31 January, 2018

Inhomogeneous, disordered, and partially ordered systems

Propagating elastic vibrations dominate thermal conduction in amorphous silicon

Jaeyun Moon, Benoit Latour, and Austin J. Minnich

Phys. Rev. B 97, 024201 (2018) - Published 10 January, 2018

Spectral statistics and scattering resonances of complex primes arrays

Ren Wang, Felipe A. Pinheiro, and Luca Dal Negro

Phys. Rev. B 97, 024202 (2018) - Published 16 January, 2018

Bimodal Ising spin glass in two dimensions: The anomalous dimension η

P. H. Lundow and I. A. Campbell

Phys. Rev. B 97, 024203 (2018) - Published 22 January, 2018

Interplay between topology and disorder in a two-dimensional semi-Dirac material

P. V. Sriluckshmy, Kush Saha, and Roderich Moessner

Phys. Rev. B 97, 024204 (2018) - Published 24 January, 2018

Consistent interpretation of experimental data for expanded liquid tungsten near the liquid-gas coexistence curve

D. V. Minakov, M. A. Paramonov, and P. R. Levashov

Phys. Rev. B 97, 024205 (2018) - Published 25 January, 2018

Dynamics, dynamical systems, lattice effects

Collective-Goldstone-mode-induced ultralow lattice thermal conductivity in Sn-filled skutterudite SnFe4Sb12

Yuhao Fu, Xin He, Lijun Zhang, and David J. Singh

Phys. Rev. B 97, 024301 (2018) - Published 3 January, 2018

Perturbative approach to weakly driven many-particle systems in the presence of approximate conservation laws

Zala Lenarčič, Florian Lange, and Achim Rosch

Phys. Rev. B 97, 024302 (2018) - Published 3 January, 2018

Volkov basis for simulation of interaction of strong laser pulses and solids

Daniel Kidd, Cody Covington, Yonghui Li, and Kálmán Varga

Phys. Rev. B 97, 024303 (2018) - Published 9 January, 2018

Trapped-mode-induced Fano resonance and acoustical transparency in a one-dimensional solid-fluid phononic crystal

Ilyasse Quotane, El Houssaine El Boudouti, and Bahram Djafari-Rouhani

Phys. Rev. B 97, 024304 (2018) - Published 16 January, 2018

Ab initio calculation of the migration free energy of oxygen diffusion in pure and samarium-doped ceria

Julius Koettgen, Peter C. Schmidt, Tomáš Bučko, and Manfred Martin

Phys. Rev. B 97, 024305 (2018) - Published 22 January, 2018

Optical defect mode with tunable Q factor in a one-dimensional anisotropic photonic crystal

Ivan V. Timofeev, Dmitrii N. Maksimov, and Almas F. Sadreev

Phys. Rev. B 97, 024306 (2018) - Published 22 January, 2018

Time-dependent variational principle in matrix-product state manifolds: Pitfalls and potential

Benedikt Kloss, Yevgeny Bar Lev, and David Reichman

Phys. Rev. B 97, 024307 (2018) - Published 26 January, 2018

Steepest entropy ascent quantum thermodynamic model of electron and phonon transport

Guanchen Li, Michael R. von Spakovsky, and Celine Hin

Phys. Rev. B 97, 024308 (2018) - Published 29 January, 2018

Magnetism

External electric field driven modification of the anomalous and spin Hall conductivities in Fe thin films on MgO(001)

Abdul-Muizz Pradipto, Toru Akiyama, Tomonori Ito, and Kohji Nakamura

Phys. Rev. B 97, 024401 (2018) - Published 3 January, 2018

Inverse spin Hall effect in AuxTa1x alloy films

D. Qu, S. Y. Huang, G. Y. Guo, and C. L. Chien

Phys. Rev. B 97, 024402 (2018) - Published 3 January, 2018

Composition-dependent magnetic response properties of Mn1xFexGe alloys

S. Mankovsky, S. Wimmer, S. Polesya, and H. Ebert

Phys. Rev. B 97, 024403 (2018) - Published 3 January, 2018

Asymmetric domain wall propagation caused by interfacial Dzyaloshinskii-Moriya interaction in exchange biased Au/Co/NiO layered system

P. Kuświk, M. Matczak, M. Kowacz, K. Szuba-Jabłoński, N. Michalak, B. Szymański, A. Ehresmann, and F. Stobiecki

Phys. Rev. B 97, 024404 (2018) - Published 3 January, 2018

Thermodynamic properties of Ba2CoSi2O6Cl2 in a strong magnetic field: Realization of flat-band physics in a highly frustrated quantum magnet

Johannes Richter, Olesia Krupnitska, Vasyl Baliha, Taras Krokhmalskii, and Oleg Derzhko

Phys. Rev. B 97, 024405 (2018) - Published 4 January, 2018

Covalency and spin-orbit coupling driven magnetism in the double-perovskite iridates Sr2MIrO6 (M=Ca, Mg)

Sayantika Bhowal and I. Dasgupta

Phys. Rev. B 97, 024406 (2018) - Published 8 January, 2018

Magnetic excitations and amplitude fluctuations in insulating cuprates

N. Chelwani, A. Baum, T. Böhm, M. Opel, F. Venturini, L. Tassini, A. Erb, H. Berger, L. Forró, and R. Hackl

Phys. Rev. B 97, 024407 (2018) - Published 9 January, 2018

Geometrical protection of topological magnetic solitons in microprocessed chiral magnets

Masaki Mito, Hiroyuki Ohsumi, Kazuki Tsuruta, Yoshinori Kotani, Tetsuya Nakamura, Yoshihiko Togawa, Misako Shinozaki, Yusuke Kato, Jun-ichiro Kishine, Jun-ichiro Ohe, Yusuke Kousaka, Jun Akimitsu, and Katsuya Inoue

Phys. Rev. B 97, 024408 (2018) - Published 9 January, 2018

Spin-wave stiffness in the Dzyaloshinskii-Moriya helimagnets Mn1xFexSi

S. V. Grigoriev, E. V. Altynbaev, S.-A. Siegfried, K. A. Pschenichnyi, D. Menzel, A. Heinemann, and G. Chaboussant

Phys. Rev. B 97, 024409 (2018) - Published 9 January, 2018

Structural and magnetic transitions in spinel FeMn2O4 single crystals

Roshan Nepal, Qiang Zhang, Samuel Dai, Wei Tian, S. E. Nagler, and Rongying Jin

Phys. Rev. B 97, 024410 (2018) - Published 11 January, 2018

Effect of applied orthorhombic lattice distortion on the antiferromagnetic phase of CeAuSb2

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

Phys. Rev. B 97, 024411 (2018) - Published 11 January, 2018

Lattice symmetry is important for classifying ordered phases in solids, but can it have consequences for the energetics of phase formation? In the heavy-fermion antiferromagnet CeAuSb2, it does. The unstressed lattice is tetragonal, and an orthorhombic distortion can be created through in-plane uniaxial pressure. For small distortions, the Néel transition is hardly affected, since the tetragonal lattice symmetry provides an energetic stabilization of the magnetic order. When the applied orthorhombicity exceeds a threshold, however, the transition splits into two transitions, and the order changes qualitatively.

Electron-assisted magnetization tunneling in single spin systems

Timofey Balashov, Christian Karlewski, Tobias Märkl, Gerd Schön, and Wulf Wulfhekel

Phys. Rev. B 97, 024412 (2018) - Published 12 January, 2018

Theory of the magnetic skyrmion glass

Shintaro Hoshino and Naoto Nagaosa

Phys. Rev. B 97, 024413 (2018) - Published 16 January, 2018

Magnetic skyrmions discovered in chiral magnets show unique physical properties due to their nontrivial topology. While their basic properties have been well understood for pure systems, in real materials there is always disorder from, for example, crystal defects or impurities. This glassy nature substantially modifies the low-energy behavior, and hence the investigation of the skyrmion glass is crucial to understanding real materials. Here, the authors theoretically study disordered chiral magnets in terms of replica field theory, and provide a firm basis to explore the glassy state of magnetic skyrmions.

Emergent odd-parity multipoles and magnetoelectric effects on a diamond structure: Implication for the 5d transition metal oxides AOsO4(A=K,Rb,and Cs)

Satoru Hayami, Hiroaki Kusunose, and Yukitoshi Motome

Phys. Rev. B 97, 024414 (2018) - Published 17 January, 2018

Effect of chemical pressure on the crystal electric field states of erbium pyrochlore magnets

J. Gaudet, A. M. Hallas, A. I. Kolesnikov, and B. D. Gaulin

Phys. Rev. B 97, 024415 (2018) - Published 17 January, 2018

Magnetism of the A-site ordered perovskites CaCu3Cr4O12 and LaCu3Cr4O12

Jun Sugiyama, Hiroshi Nozaki, Izumi Umegaki, Kazutoshi Miwa, Wataru Higemoto, Eduardo J. Ansaldo, Jess H. Brewer, Hiroya Sakurai, Masahiko Isobe, Hidenori Takagi, and Martin Månsson

Phys. Rev. B 97, 024416 (2018) - Published 18 January, 2018

Double-spiral magnetic structure of the Fe/Cr multilayer revealed by nuclear resonance reflectivity

M. A. Andreeva, R. A. Baulin, A. I. Chumakov, R. Rüffer, G. V. Smirnov, Y. A. Babanov, D. I. Devyaterikov, M. A. Milyaev, D. A. Ponomarev, L. N. Romashev, and V. V. Ustinov

Phys. Rev. B 97, 024417 (2018) - Published 18 January, 2018

Origin of the net magnetic moment in LaCoO3

G. M. Kaminsky, D. P. Belanger, F. Ye, J. A. Fernandez-Baca, J. Wang, M. Matsuda, and J.-Q. Yan

Phys. Rev. B 97, 024418 (2018) - Published 19 January, 2018

The authors here combine polarized neutron scattering experimental work with computational minimization of proposed Hamiltonians in an effort to understand the low-temperature magnetic behavior in small applied magnetic fields for LaCoO3. They provide an exceptionally comprehensive study of the phase diagrams generated by various Hamiltonians germane to a situation in which magnetic ordering occurs at twin boundaries due to antiferromagnetic chains crossing the boundary at an angle different than 90°.

Hyperfine interactions of Er3+ ions in Y2SiO5: Electron paramagnetic resonance in a tunable microwave cavity

Yu-Hui Chen, Xavier Fernandez-Gonzalvo, Sebastian P. Horvath, Jelena V. Rakonjac, and Jevon J. Longdell

Phys. Rev. B 97, 024419 (2018) - Published 19 January, 2018

Ab initio calculation of spin fluctuation spectra using time-dependent density functional perturbation theory, plane waves, and pseudopotentials

Kun Cao, Henry Lambert, Paolo G. Radaelli, and Feliciano Giustino

Phys. Rev. B 97, 024420 (2018) - Published 19 January, 2018

Spin order in the charge disproportionated phases of the A-site layer ordered triple perovskite LaCa2Fe3O9

Angel M. Arevalo-Lopez, Yoshiteru Hosaka, Haichuan Guo, Fabio Denis Romero, Takashi Saito, J. Paul Attfield, and Yuichi Shimakawa

Phys. Rev. B 97, 024421 (2018) - Published 19 January, 2018

Multispin-assisted optical pumping of bulk C13 nuclear spin polarization in diamond

Daniela Pagliero, K. R. Koteswara Rao, Pablo R. Zangara, Siddharth Dhomkar, Henry H. Wong, Andrea Abril, Nabeel Aslam, Anna Parker, Jonathan King, Claudia E. Avalos, Ashok Ajoy, Joerg Wrachtrup, Alexander Pines, and Carlos A. Meriles

Phys. Rev. B 97, 024422 (2018) - Published 22 January, 2018

The nitrogen-vacancy (NV) center in diamond is known to spin-polarize under optical illumination, but how is this polarization transferred to carbon spins in the bulk of the crystal? Here, the authors use field-cycled nuclear magnetic resonance to study the formation of light-driven 13C spin polarization in NV-rich diamond at room temperature. By considering the system’s response to various magnetic fields, it is shown that 13C spins polarize via a cross-relaxation process involving the NV center and the electron and nuclear spins of the substitutional nitrogen impurities. Furthermore, it is shown that high levels of 13C spin polarization can be attained for almost any magnetic field orientation.

Comprehensive cluster-theory analysis of the magnetic structures and excitations in CoCl2·2H2O

Jens Jensen, Jacob Larsen, and Ursula B. Hansen

Phys. Rev. B 97, 024423 (2018) - Published 22 January, 2018

Magnetization precession by short-wavelength magnon excitations and spin-transfer torque

Shizhu Qiao, Shishen Yan, Shishou Kang, Qiang Li, Yufeng Qin, Yinrui Zhao, Zhiyu Zhang, and Shuqing Li

Phys. Rev. B 97, 024424 (2018) - Published 22 January, 2018

Nonlinear NMR and magnon BEC in antiferromagnetic materials with coupled electron and nuclear spin precession

L. V. Abdurakhimov, M. A. Borich, Yu. M. Bunkov, R. R. Gazizulin, D. Konstantinov, M. I. Kurkin, and A. P. Tankeyev

Phys. Rev. B 97, 024425 (2018) - Published 22 January, 2018

Coupling between vortices and antivortices in a cross-tie wall studied by time-resolved SEMPA

Fabian Kloodt-Twesten, Susanne Kuhrau, Philipp Staeck, Demetrio R. Cavicchia, Fabian Lofink, Hans Peter Oepen, and Robert Frömter

Phys. Rev. B 97, 024426 (2018) - Published 23 January, 2018

Spin-lattice relaxation of magnetic centers in molecular crystals at low temperature

Le Tuan Anh Ho and Liviu F. Chibotaru

Phys. Rev. B 97, 024427 (2018) - Published 23 January, 2018

Enhancement of exchange bias in ferromagnetic/antiferromagnetic core-shell nanoparticles through ferromagnetic domain wall formation

Rui Wu (吴锐), Shilei Ding (丁石磊), Youfang Lai (赖有方), Guang Tian (田广), and Jinbo Yang (杨金波)

Phys. Rev. B 97, 024428 (2018) - Published 25 January, 2018

Uniaxial strain modulation of the skyrmion phase transition in ferromagnetic thin films

Jie Wang, Yinuo Shi, and Marc Kamlah

Phys. Rev. B 97, 024429 (2018) - Published 25 January, 2018

Anomalous magnetic and spin glass behavior in Nb-substituted LaCo1xNbxO3

Rishabh Shukla and R. S. Dhaka

Phys. Rev. B 97, 024430 (2018) - Published 26 January, 2018

Spin-resolved inelastic electron scattering by spin waves in noncollinear magnets

Flaviano José dos Santos, Manuel dos Santos Dias, Filipe Souza Mendes Guimarães, Juba Bouaziz, and Samir Lounis

Phys. Rev. B 97, 024431 (2018) - Published 26 January, 2018

Dynamic scaling of topological ordering in classical systems

Na Xu, Claudio Castelnovo, Roger G. Melko, Claudio Chamon, and Anders W. Sandvik

Phys. Rev. B 97, 024432 (2018) - Published 29 January, 2018

Direct measurement of the static and transient magneto-optical permittivity of cobalt across the entire M-edge in reflection geometry by use of polarization scanning

Dmitriy Zusin, Phoebe M. Tengdin, Maithreyi Gopalakrishnan, Christian Gentry, Adam Blonsky, Michael Gerrity, Dominik Legut, Justin M. Shaw, Hans T. Nembach, T. J. Silva, Peter M. Oppeneer, Henry C. Kapteyn, and Margaret M. Murnane

Phys. Rev. B 97, 024433 (2018) - Published 30 January, 2018

It has long been known that the magnetic order in a material can be transiently disrupted by an intense laser pulse, on surprisingly fast sub-picosecond timescales. However, two decades after its discovery, the microscopic physics underlying this behavior is still not completely understood. Here, the authors develop a new extreme ultraviolet (EUV) magneto-optical spectroscopy that allows them to extract the full dynamic complex magneto-optical permittivity of a material. By exciting a Co film with a femtosecond laser pulse, and then scanning both the polarization and arrival time of a high-harmonic probe beam, they extract the instantaneous complex magneto-optical constant of Co across the M2,3 absorption edge. Through a direct comparison with ab initio theory, they show that the observed demagnetization is dominated by the excitation of magnons, with a possible small contribution from a reduction of the exchange splitting. This work further demonstrates the deepened insight on magnetism obtained through the recent application of tabletop-scale femtosecond EUV light sources.

Global entanglement and quantum phase transitions in the transverse XY Heisenberg chain

Roya Radgohar and Afshin Montakhab

Phys. Rev. B 97, 024434 (2018) - Published 30 January, 2018

Superfluidity and superconductivity

Microscopic investigation of the weakly correlated noncentrosymmetric superconductor SrAuSi3

N. Barbero, P. K. Biswas, M. Isobe, A. Amato, E. Morenzoni, A. D. Hillier, H.-R. Ott, J. Mesot, and T. Shiroka

Phys. Rev. B 97, 024501 (2018) - Published 3 January, 2018

Extensive impurity-scattering study on the pairing symmetry of monolayer FeSe films on SrTiO3

Chong Liu, Jiahao Mao, Hao Ding, Rui Wu, Chenjia Tang, Fangsen Li, Ke He, Wei Li, Can-Li Song, Xu-Cun Ma, Zheng Liu, Lili Wang, and Qi-Kun Xue

Phys. Rev. B 97, 024502 (2018) - Published 3 January, 2018

Weak three-dimensional mediators of two-dimensional triplet pairing

Shane Kelly and S.-W. Tsai

Phys. Rev. B 97, 024503 (2018) - Published 4 January, 2018

Superconducting fluctuations in FeSe0.5Te0.5 thin films probed via microwave spectroscopy

Fuyuki Nabeshima, Kosuke Nagasawa, Atsutaka Maeda, and Yoshinori Imai

Phys. Rev. B 97, 024504 (2018) - Published 5 January, 2018

Quantum vortex melting and phase diagram in the layered organic superconductor κ-(BEDT-TTF)2Cu(NCS)2

S. Uji, Y. Fujii, S. Sugiura, T. Terashima, T. Isono, and J. Yamada

Phys. Rev. B 97, 024505 (2018) - Published 8 January, 2018

Topology and symmetry of surface Majorana arcs in cyclic superconductors

Takeshi Mizushima and Muneto Nitta

Phys. Rev. B 97, 024506 (2018) - Published 9 January, 2018

Symmetry analysis of odd- and even-frequency superconducting gap symmetries for time-reversal symmetric interactions

R. Matthias Geilhufe and Alexander V. Balatsky

Phys. Rev. B 97, 024507 (2018) - Published 11 January, 2018

Vanishing Hall conductance in the phase-glass Bose metal at zero temperature

Julian May-Mann and Philip W. Phillips

Phys. Rev. B 97, 024508 (2018) - Published 11 January, 2018

Nuclear magnetic resonance in low-symmetry superconductors

D. C. Cavanagh and B. J. Powell

Phys. Rev. B 97, 024509 (2018) - Published 11 January, 2018

Excitation of terahertz modes localized on a layered superconductor: Anomalous dispersion and resonant transmission

S. S. Apostolov, N. M. Makarov, and V. A. Yampol'skii

Phys. Rev. B 97, 024510 (2018) - Published 17 January, 2018

Superconductivity, pairing symmetry, and disorder in the doped topological insulator Sn1xInxTe for x0.10

M. P. Smylie, H. Claus, W.-K. Kwok, E. R. Louden, M. R. Eskildsen, A. S. Sefat, R. D. Zhong, J. Schneeloch, G. D. Gu, E. Bokari, P. M. Niraula, A. Kayani, C. D. Dewhurst, A. Snezhko, and U. Welp

Phys. Rev. B 97, 024511 (2018) - Published 19 January, 2018

Charge response of the Majorana toric code

Ananda Roy and Fabian Hassler

Phys. Rev. B 97, 024512 (2018) - Published 22 January, 2018

Superconductor-insulator transition in fcc GeSb2Te4 at elevated pressures

Bar Hen, Samar Layek, Moshe Goldstein, Victor Shelukhin, Mark Shulman, Michael Karpovski, Eran Greenberg, Eran Sterer, Yoram Dagan, Gregory Kh. Rozenberg, and Alexander Palevski

Phys. Rev. B 97, 024513 (2018) - Published 23 January, 2018

Relativistic spin-polarized KKR theory for superconducting heterostructures: Oscillating order parameter in the Au layer of Nb/Au/Fe trilayers

Gábor Csire, András Deák, Bendegúz Nyári, Hubert Ebert, James F. Annett, and Balázs Újfalussy

Phys. Rev. B 97, 024514 (2018) - Published 23 January, 2018

p-wave superconductivity in weakly repulsive 2D Hubbard model with Zeeman splitting and weak Rashba spin-orbit coupling

Henning G. Hugdal and Asle Sudbø

Phys. Rev. B 97, 024515 (2018) - Published 24 January, 2018

Coexistence of multiphase superconductivity and ferromagnetism in lithiated iron selenide hydroxide [(Li1xFex)OH]FeSe

Christian Urban, Ilya Valmianski, Ursula Pachmayr, Ali C. Basaran, Dirk Johrendt, and Ivan K. Schuller

Phys. Rev. B 97, 024516 (2018) - Published 25 January, 2018

Spin-valve Josephson junctions for cryogenic memory

Bethany M. Niedzielski, T. J. Bertus, Joseph A. Glick, R. Loloee, W. P. Pratt, Jr., and Norman O. Birge

Phys. Rev. B 97, 024517 (2018) - Published 29 January, 2018

Bistability in a mesoscopic Josephson junction array resonator

P. R. Muppalla, O. Gargiulo, S. I. Mirzaei, B. Prasanna Venkatesh, M. L. Juan, L. Grünhaupt, I. M. Pop, and G. Kirchmair

Phys. Rev. B 97, 024518 (2018) - Published 30 January, 2018

Spin-isotropic continuum of spin excitations in antiferromagnetically ordered Fe1.07Te

Yu Song, Xingye Lu, L.-P. Regnault, Yixi Su, Hsin-Hua Lai, Wen-Jun Hu, Qimiao Si, and Pengcheng Dai

Phys. Rev. B 97, 024519 (2018) - Published 31 January, 2018

Landau levels from neutral Bogoliubov particles in two-dimensional nodal superconductors under strain and doping gradients

Emilian M. Nica and Marcel Franz

Phys. Rev. B 97, 024520 (2018) - Published 31 January, 2018

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