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HIGHLIGHTED ARTICLES

Nuclear magnetic resonance study of the magnetic-field-induced ordered phase in the NiCl24SC(NH2)2 compound

Rémi Blinder, Maxime Dupont, Sutirtha Mukhopadhyay, Mihael S. Grbić, Nicolas Laflorencie, Sylvain Capponi, Hadrien Mayaffre, Claude Berthier, Armando Paduan-Filho, and Mladen Horvatić

Phys. Rev. B 95, 020404(R) (2017) - Published 3 January, 2017

The NiCl2-4SC(NH2)2 spin-chain compound, also called “DTN”, is one of the most studied archetype materials that at low temperature presents the magnetic-field-induced ordered phase that is described as a Bose-Einstein condensate (BEC). The paper here presents an NMR study of the static properties of this phase, where, for the first time, the exact absolute value of the order parameter has been determined and compared to theoretical predictions. The precise phase boundary of the BEC phase close to its upper critical field is found to be in perfect agreement with theory, and used to define and discuss the range of validity of the Hartree-Fock-Popov approximation. DTN is a unique quasi-1D BEC-type material for which the sub-dominant 3D exchange couplings are known from independent measurements, so that theoretical descriptions are completely constrained. Therefore, precise state-of-the-art numerical methods could be used to critically discuss the applicability of approximate 1D-based descriptions (e.g., Tomonaga-Luttinger liquid + mean field) to the case when the quasi-1D character is of intermediate strength. The NMR results presented here and the corresponding theoretical descriptions can be considered as reference data and analysis for BEC-type compounds, which have been missing for a long time in this field of research.

Direct three-dimensional ordering of quasi-one-dimensional quantum dimer system near critical fields

Taku Matsushita, Nobuyoshi Hori, Seiya Takata, Nobuo Wada, Naoki Amaya, and Yuko Hosokoshi

Phys. Rev. B 95, 020408(R) (2017) - Published 12 January, 2017

As the temperature lowers in the gapless region, quantum quasi-1D spin systems show one-dimensional (1D) short-range ordering (SRO) corresponding to a Tomonaga-Luttinger liquid (TLL) by the interaction within chains, and then at lower temperatures where the small interchain interaction cannot be ignored, they have a three-dimensional (3D) long- range ordered (LRO, BEC) phase. This generally accepted scenario for the dimensional crossover of quasi-1D spin ordering, however, is debatable around the critical field, because the 1D SRO (TLL) regime has a linear boundary on the H-T phase diagram, while the 3D LRO transition temperature has a convex shape. To this dimensionality paradox around the critical field, the authors have given the solution, experimentally by detailed analyses of the specific heat and ac susceptibility for bond-alternating antiferromagnetic chains in pentafluorophenyl nitronyl nitroxide (F5PNN). They reveal the existence of a definite field region near a critical field, where 3D LRO (BEC) directly occurs without passing through 1D SRO region at higher temperatures, even if the interchain interaction is sufficiently small compared to the intrachain one.

Excitations and magnetization density distribution in the dilute ferromagnetic semiconductor Yb14MnSb11

M. B. Stone, V. O. Garlea, B. Gillon, A. Cousson, A. D. Christianson, M. D. Lumsden, S. E. Nagler, D. Mandrus, and B. C. Sales

Phys. Rev. B 95, 020412(R) (2017) - Published 23 January, 2017

While it is mostly well-known for its excellent thermoelectric properties at high temperatures, Yb14MnSb11 has also come to be characterized as a ferromagnetic semiconductor. Such systems support ferromagnetic correlations similar to metallic compounds, although with semiconducting electronic configurations. As such, they are promising materials for use in spintronic devices. The authors here use neutron scattering techniques to examine the distribution of the magnetization density and the energy scale of the magnetic exchange interactions in the Yb14MnSb11 compound. They find that there is a large ferromagnetic moment localized to the Mn site in the crystal structure with a ‘Kondo cloud’ of negative moments distributed over the other atomic sites. The results provide long sought answers to questions regarding the valence, magnetization distribution, and energy scales of the magnetic interactions in this compound. The ferromagnetic spin-wave spectrum supports this premise and is well characterized by inclusion of nearest and next-nearest neighbor exchange interactions.

Double vibronic process in the quantum spin ice candidate Tb2Ti2O7 revealed by terahertz spectroscopy

E. Constable, R. Ballou, J. Robert, C. Decorse, J.-B. Brubach, P. Roy, E. Lhotel, L. Del-Rey, V. Simonet, S. Petit, and S. deBrion

Phys. Rev. B 95, 020415(R) (2017) - Published 27 January, 2017

In the field of geometrically frustrated magnetism, the very nature of the ground state of Tb2Ti2O7 has remained a long-standing conundrum. In this pyrochlore material, no conventional spin-ice or long-range magnetic order is stabilized, even at very low temperatures. Quantum fluctuations are suspected of being at the origin of such an exotic quantum phase, yet so far there is no conclusive evidence. Here, high-resolution synchrotron-based terahertz spectroscopy probes the lowest energy excitations of Tb2Ti2O7. By exciting transitions within the crystal electric field and crystal lattice, it is revealed that a double hybridization of crystal-field phonon modes is present across a broad temperature range. This unique vibronic process triggers coupling between several degrees of freedom that provides a crucial path for quantum spin-flip fluctuations to inhibit the stabilization of conventional magnetic states. While providing evidence for the unique quantum phase in Tb2Ti2O7, the result also highlights the powerful and complementary nature of terahertz spectroscopy as a probe in the study of exotic magnetic and frustrated phases.

Mode decomposition based on crystallographic symmetry in the band-unfolding method

Yuji Ikeda, Abel Carreras, Atsuto Seko, Atsushi Togo, and Isao Tanaka

Phys. Rev. B 95, 024305 (2017) - Published 13 January, 2017

The band-unfolding method is now widely used to calculate the effective band structures of a disordered system from its supercell model. The unfolded band structures are obtained as if the disordered system really has the crystallographic symmetry of its underlying structure. However, it has still been difficult to decompose the unfolded band structures into the modes based on the crystallographic symmetry of the underlying structure. This has prohibited detailed analyses of, e.g., selection rules and avoided band crossings for the unfolded band structures. The authors here develop a procedure to decompose the unfolded band structures according to the small representations (SRs) of the little groups. The decomposition is performed using the projection operators for SRs derived from the group representation theory. Using this procedure, the authors investigate the phonon band structure of disordered face-centered-cubic Cu0.75Au0.25, which has large variations of atomic masses and force constants among the atomic sites due to the chemical disorder. In the unfolded phonon band structure, several peculiar behaviors such as discontinuous and split branches are found in the decomposed modes corresponding to specific SRs.

Chiral charge pumping in graphene deposited on a magnetic insulator

Michael Evelt, Hector Ochoa, Oleksandr Dzyapko, Vladislav E. Demidov, Avgust Yurgens, Jie Sun, Yaroslav Tserkovnyak, Vladimir Bessonov, Anatoliy B. Rinkevich, and Sergej O. Demokritov

Phys. Rev. B 95, 024408 (2017) - Published 9 January, 2017

Yttrium iron garnet (YIG) holds a special place among all magnetic materials since it shows an unprecedentedly small magnetic damping, resulting in the narrowest known line in ferromagnetic resonance and enabling propagation of spin waves over long distances. Due to these unique characteristics, YIG films have been recently considered as a promising material for spintronic and magnonic applications. By combining YIG and a single layer of graphene in a bilayer, one obtains a unique model system for investigations of magnetic interfacial effects. Here, the authors demonstrate experimentally that the system shows a sizable chiral charge pumping, which could arise from an imbalance of screw dislocations. The effect, which cannot be attributed to the ordinary spin pumping, reveals itself in the creation of a dc electric field/voltage in graphene as a response to the dynamic magnetic excitations (spin waves) in an adjacent out-of-plane magnetized YIG film. The authors show that the induced voltage changes its sign when the orientation of the static magnetization is reversed, clearly indicating the broken mirror reflection symmetry about the planes normal to the graphene/YIG interface. The strength of effect shows a nonmonotonic dependence on the spin-wave frequency, in agreement with the proposed theoretical model.

Computational investigation of half-Heusler compounds for spintronics applications

Jianhua Ma, Vinay I. Hegde, Kamaram Munira, Yunkun Xie, Sahar Keshavarz, David T. Mildebrath, C. Wolverton, Avik W. Ghosh, and W. H. Butler

Phys. Rev. B 95, 024411 (2017) - Published 11 January, 2017

The authors investigate the properties of 378 half-Heusler compounds using density functional theory with the goal of identifying promising candidates for spintronic applications, e.g. half-metals. Although DFT has often been applied to the search for half-metals, this study may be the most comprehensive attempt to identify which of the compounds predicted by DFT to be half-metals are likely to be fabricated. The calculated formation energy of each of the 378 potential half Heuslers was compared to that of all competing phases and combination of phases in the Open Quantum Materials Database. Those semiconductors, half-metals, and near half-metals within an empirically determined 0.1 eV/atom hull distance margin for neglected effects were deemed of interest for further experimental investigation.

Symmetry breaking, slow relaxation dynamics, and topological defects at the field-induced helix reorientation in MnSi

A. Bauer, A. Chacon, M. Wagner, M. Halder, R. Georgii, A. Rosch, C. Pfleiderer, and M. Garst

Phys. Rev. B 95, 024429 (2017) - Published 25 January, 2017

The Dzyaloshinskii-Moriya interaction in the cubic chiral magnet MnSi stabilizes a magnetic helix - a periodic one-dimensional modulation of the magnetization. The orientation of this helix is determined by weak magnetocrystalline anisotropies, but it can be reoriented by applying a magnetic field. Here, the authors have studied this reorientation process by means of small-angle neutron scattering and susceptibility measurements. Their results are in excellent agreement with predictions of an effective mean-field theory taking into account the precise symmetries of the crystal structure. Measurements of the magnetization and ac susceptibility provide evidence that the reorientation of helimagnetic domains is associated with large relaxation times exceeding seconds. In addition, hysteresis at the Ising transitions indicates, within the same theoretical framework, the formation of an abundance of plastic deformations of the helical spin order. These deformations comprise topologically nontrivial disclinations, reminiscent of the skyrmions discovered recently in the same class of materials.

RAPID COMMUNICATIONS

Structure, structural phase transitions, mechanical properties, defects

Electrostrain enhancement at an invisible boundary in a single ferroelectric phase

Luo Zhao, Xiaoqin Ke, Weichen Wang, Le Zhang, Chao Zhou, Zhijian Zhou, Lixue Zhang, and Xiaobing Ren

Phys. Rev. B 95, 020101(R) (2017) - Published 4 January, 2017

Successive spatial symmetry breaking under high pressure in the spin-orbit-coupled metal Cd2Re2O7

Jun-ichi Yamaura, Keiki Takeda, Yoichi Ikeda, Naohisa Hirao, Yasuo Ohishi, Tatsuo C. Kobayashi, and Zenji Hiroi

Phys. Rev. B 95, 020102(R) (2017) - Published 11 January, 2017

Pressure-stabilized hafnium nitrides and their properties

Jin Zhang, Artem R. Oganov, Xinfeng Li, and Haiyang Niu

Phys. Rev. B 95, 020103(R) (2017) - Published 18 January, 2017

Direct synthesis of pure H3S from S and H elements: No evidence of the cubic superconducting phase up to 160 GPa

Bastien Guigue, Adrien Marizy, and Paul Loubeyre

Phys. Rev. B 95, 020104(R) (2017) - Published 23 January, 2017

Inhomogeneous, disordered, and partially ordered systems

Statistical bubble localization with random interactions

Xiaopeng Li, Dong-Ling Deng, Yang-Le Wu, and S. Das Sarma

Phys. Rev. B 95, 020201(R) (2017) - Published 24 January, 2017

Dynamics, dynamical systems, lattice effects

Excited configurations of hydrogen in the BaTiO3xHx perovskite lattice associated with hydrogen exchange and transport

T. U. Ito, A. Koda, K. Shimomura, W. Higemoto, T. Matsuzaki, Y. Kobayashi, and H. Kageyama

Phys. Rev. B 95, 020301(R) (2017) - Published 31 January, 2017

Magnetism

Magnon transport in noncollinear spin textures: Anisotropies and topological magnon Hall effects

Alexander Mook, Börge Göbel, Jürgen Henk, and Ingrid Mertig

Phys. Rev. B 95, 020401(R) (2017) - Published 3 January, 2017

Quantum-critical spin dynamics in a Tomonaga-Luttinger liquid studied with muon-spin relaxation

J. S. Möller, T. Lancaster, S. J. Blundell, F. L. Pratt, P. J. Baker, F. Xiao, R. C. Williams, W. Hayes, M. M. Turnbull, and C. P. Landee

Phys. Rev. B 95, 020402(R) (2017) - Published 3 January, 2017

Absence of nematic ordering transition in a diamond lattice: Application to FeSc2S4

Chandan Setty, Zhidong Leong, Shuyi Zhang, and Philip W. Phillips

Phys. Rev. B 95, 020403(R) (2017) - Published 3 January, 2017

Nuclear magnetic resonance study of the magnetic-field-induced ordered phase in the NiCl24SC(NH2)2 compound

Rémi Blinder, Maxime Dupont, Sutirtha Mukhopadhyay, Mihael S. Grbić, Nicolas Laflorencie, Sylvain Capponi, Hadrien Mayaffre, Claude Berthier, Armando Paduan-Filho, and Mladen Horvatić

Phys. Rev. B 95, 020404(R) (2017) - Published 3 January, 2017

The NiCl2-4SC(NH2)2 spin-chain compound, also called “DTN”, is one of the most studied archetype materials that at low temperature presents the magnetic-field-induced ordered phase that is described as a Bose-Einstein condensate (BEC). The paper here presents an NMR study of the static properties of this phase, where, for the first time, the exact absolute value of the order parameter has been determined and compared to theoretical predictions. The precise phase boundary of the BEC phase close to its upper critical field is found to be in perfect agreement with theory, and used to define and discuss the range of validity of the Hartree-Fock-Popov approximation. DTN is a unique quasi-1D BEC-type material for which the sub-dominant 3D exchange couplings are known from independent measurements, so that theoretical descriptions are completely constrained. Therefore, precise state-of-the-art numerical methods could be used to critically discuss the applicability of approximate 1D-based descriptions (e.g., Tomonaga-Luttinger liquid + mean field) to the case when the quasi-1D character is of intermediate strength. The NMR results presented here and the corresponding theoretical descriptions can be considered as reference data and analysis for BEC-type compounds, which have been missing for a long time in this field of research.

Electromagnon resonance in a collinear spin state of the polar antiferromagnet Fe2Mo3O8

T. Kurumaji, Y. Takahashi, J. Fujioka, R. Masuda, H. Shishikura, S. Ishiwata, and Y. Tokura

Phys. Rev. B 95, 020405(R) (2017) - Published 5 January, 2017

First-principles study of iron spin crossover in the new hexagonal aluminous phase

Han Hsu

Phys. Rev. B 95, 020406(R) (2017) - Published 6 January, 2017

Nonreciprocal propagation of surface acoustic wave in Ni/LiNbO3

R. Sasaki, Y. Nii, Y. Iguchi, and Y. Onose

Phys. Rev. B 95, 020407(R) (2017) - Published 10 January, 2017

Direct three-dimensional ordering of quasi-one-dimensional quantum dimer system near critical fields

Taku Matsushita, Nobuyoshi Hori, Seiya Takata, Nobuo Wada, Naoki Amaya, and Yuko Hosokoshi

Phys. Rev. B 95, 020408(R) (2017) - Published 12 January, 2017

As the temperature lowers in the gapless region, quantum quasi-1D spin systems show one-dimensional (1D) short-range ordering (SRO) corresponding to a Tomonaga-Luttinger liquid (TLL) by the interaction within chains, and then at lower temperatures where the small interchain interaction cannot be ignored, they have a three-dimensional (3D) long- range ordered (LRO, BEC) phase. This generally accepted scenario for the dimensional crossover of quasi-1D spin ordering, however, is debatable around the critical field, because the 1D SRO (TLL) regime has a linear boundary on the H-T phase diagram, while the 3D LRO transition temperature has a convex shape. To this dimensionality paradox around the critical field, the authors have given the solution, experimentally by detailed analyses of the specific heat and ac susceptibility for bond-alternating antiferromagnetic chains in pentafluorophenyl nitronyl nitroxide (F5PNN). They reveal the existence of a definite field region near a critical field, where 3D LRO (BEC) directly occurs without passing through 1D SRO region at higher temperatures, even if the interchain interaction is sufficiently small compared to the intrachain one.

Magnetoresistive detection of strongly pinned uncompensated magnetization in antiferromagnetic FeMn

Pavel N. Lapa, Igor V. Roshchin, Junjia Ding, John. E. Pearson, Valentine Novosad, J. S. Jiang, and Axel Hoffmann

Phys. Rev. B 95, 020409(R) (2017) - Published 17 January, 2017

Suppression of magnetic excitations near the surface of the topological Kondo insulator SmB6

P. K. Biswas, M. Legner, G. Balakrishnan, M. Ciomaga Hatnean, M. R. Lees, D. McK. Paul, E. Pomjakushina, T. Prokscha, A. Suter, T. Neupert, and Z. Salman

Phys. Rev. B 95, 020410(R) (2017) - Published 18 January, 2017

Unusual magnetic excitations in the weakly ordered spin-12 chain antiferromagnet Sr2CuO3: Possible evidence for Goldstone magnon coupled with the amplitude mode

E. G. Sergeicheva, S. S. Sosin, L. A. Prozorova, G. D. Gu, and I. A. Zaliznyak

Phys. Rev. B 95, 020411(R) (2017) - Published 18 January, 2017

Excitations and magnetization density distribution in the dilute ferromagnetic semiconductor Yb14MnSb11

M. B. Stone, V. O. Garlea, B. Gillon, A. Cousson, A. D. Christianson, M. D. Lumsden, S. E. Nagler, D. Mandrus, and B. C. Sales

Phys. Rev. B 95, 020412(R) (2017) - Published 23 January, 2017

While it is mostly well-known for its excellent thermoelectric properties at high temperatures, Yb14MnSb11 has also come to be characterized as a ferromagnetic semiconductor. Such systems support ferromagnetic correlations similar to metallic compounds, although with semiconducting electronic configurations. As such, they are promising materials for use in spintronic devices. The authors here use neutron scattering techniques to examine the distribution of the magnetization density and the energy scale of the magnetic exchange interactions in the Yb14MnSb11 compound. They find that there is a large ferromagnetic moment localized to the Mn site in the crystal structure with a ‘Kondo cloud’ of negative moments distributed over the other atomic sites. The results provide long sought answers to questions regarding the valence, magnetization distribution, and energy scales of the magnetic interactions in this compound. The ferromagnetic spin-wave spectrum supports this premise and is well characterized by inclusion of nearest and next-nearest neighbor exchange interactions.

Strongly gapped spin-wave excitation in the insulating phase of NaOsO3

S. Calder, J. G. Vale, N. Bogdanov, C. Donnerer, D. Pincini, M. Moretti Sala, X. Liu, M. H. Upton, D. Casa, Y. G. Shi, Y. Tsujimoto, K. Yamaura, J. P. Hill, J. van den Brink, D. F. McMorrow, and A. D. Christianson

Phys. Rev. B 95, 020413(R) (2017) - Published 23 January, 2017

Conversion of electronic to magnonic spin current at a heavy-metal magnetic-insulator interface

Xi-guang Wang, Zhi-xiong Li, Zhen-wei Zhou, Yao-zhuang Nie, Qing-lin Xia, Zhong-ming Zeng, L. Chotorlishvili, J. Berakdar, and Guang-hua Guo

Phys. Rev. B 95, 020414(R) (2017) - Published 26 January, 2017

Double vibronic process in the quantum spin ice candidate Tb2Ti2O7 revealed by terahertz spectroscopy

E. Constable, R. Ballou, J. Robert, C. Decorse, J.-B. Brubach, P. Roy, E. Lhotel, L. Del-Rey, V. Simonet, S. Petit, and S. deBrion

Phys. Rev. B 95, 020415(R) (2017) - Published 27 January, 2017

In the field of geometrically frustrated magnetism, the very nature of the ground state of Tb2Ti2O7 has remained a long-standing conundrum. In this pyrochlore material, no conventional spin-ice or long-range magnetic order is stabilized, even at very low temperatures. Quantum fluctuations are suspected of being at the origin of such an exotic quantum phase, yet so far there is no conclusive evidence. Here, high-resolution synchrotron-based terahertz spectroscopy probes the lowest energy excitations of Tb2Ti2O7. By exciting transitions within the crystal electric field and crystal lattice, it is revealed that a double hybridization of crystal-field phonon modes is present across a broad temperature range. This unique vibronic process triggers coupling between several degrees of freedom that provides a crucial path for quantum spin-flip fluctuations to inhibit the stabilization of conventional magnetic states. While providing evidence for the unique quantum phase in Tb2Ti2O7, the result also highlights the powerful and complementary nature of terahertz spectroscopy as a probe in the study of exotic magnetic and frustrated phases.

Superfluidity and superconductivity

Conductance spectroscopy of nontopological-topological superconductor junctions

F. Setiawan, William S. Cole, Jay D. Sau, and S. Das Sarma

Phys. Rev. B 95, 020501(R) (2017) - Published 6 January, 2017

Decoherence and interferometric sensitivity of boson sampling in superconducting resonator networks

Samuel Goldstein, Simcha Korenblit, Ydan Bendor, Hao You, Michael R. Geller, and Nadav Katz

Phys. Rev. B 95, 020502(R) (2017) - Published 17 January, 2017

Tuning phase transitions in FeSe thin flakes by field-effect transistor with solid ion conductor as the gate dielectric

B. Lei, N. Z. Wang, C. Shang, F. B. Meng, L. K. Ma, X. G. Luo, T. Wu, Z. Sun, Y. Wang, Z. Jiang, B. H. Mao, Z. Liu, Y. J. Yu, Y. B. Zhang, and X. H. Chen

Phys. Rev. B 95, 020503(R) (2017) - Published 30 January, 2017

ARTICLES

Structure, structural phase transitions, mechanical properties, defects

Temperature-induced valence instability in the charge-transfer crystal TMB-TCNQ

Nicola Castagnetti, Gabriele Kociok-Köhn, Enrico Da Como, and Alberto Girlando

Phys. Rev. B 95, 024101 (2017) - Published 3 January, 2017

Oxygen evolution from olivine Mn1xMxPO4 (M=Fe,Ni,Al,Mg) delithiated cathode materials

David H. Snydacker and C. Wolverton

Phys. Rev. B 95, 024102 (2017) - Published 3 January, 2017

Ordering and dimensional crossovers in metallic glasses and liquids

David Z. Chen, Qi An, William A. Goddard, III, and Julia R. Greer

Phys. Rev. B 95, 024103 (2017) - Published 4 January, 2017

Temperature-dependent volume fraction of polar nanoregions in lead-free (1x)(Bi0.5Na0.5)TiO3xBaTiO3 ceramics

M. Vögler, N. Novak, F. H. Schader, and J. Rödel

Phys. Rev. B 95, 024104 (2017) - Published 4 January, 2017

Anisotropy of infrared-active phonon modes in the monodomain state of tetragonal SrTiO3 (110)

M. Yazdi-Rizi, P. Marsik, B. P. P. Mallett, and C. Bernhard

Phys. Rev. B 95, 024105 (2017) - Published 5 January, 2017

Parametric autoexcitation of magnetic droplet soliton perimeter modes

D. Xiao, V. Tiberkevich, Y. H. Liu, Y. W. Liu, S. M. Mohseni, S. Chung, M. Ahlberg, A. N. Slavin, J. Åkerman, and Yan Zhou

Phys. Rev. B 95, 024106 (2017) - Published 6 January, 2017

Pressure-induced structural evaluation and insulator-metal transition in the mixed spinel ferrite Zn0.2Mg0.8Fe2O4

S. Rahman, Sudeshna Samanta, D. Errandonea, Shuai Yan, Ke Yang, Junling Lu, and Lin Wang

Phys. Rev. B 95, 024107 (2017) - Published 9 January, 2017

First-principles investigation of structural and magnetic disorder in CuNiMnAl and CuNiMnSn Heusler alloys

S. Aron-Dine, G. S. Pomrehn, A. Pribram-Jones, K. J. Laws, and L. Bassman

Phys. Rev. B 95, 024108 (2017) - Published 10 January, 2017

Role of orbital filling on nonlinear ionic Raman scattering in perovskite titanates

Mingqiang Gu and James M. Rondinelli

Phys. Rev. B 95, 024109 (2017) - Published 11 January, 2017

Locked octahedral tilting in orthorhombic perovskites: At the boundary of the general rule predicting phase transitions

M. Ardit, M. Dondi, and G. Cruciani

Phys. Rev. B 95, 024110 (2017) - Published 23 January, 2017

Critical slowing of quantum atomic deuterium/hydrogen with features of multiferroicity in the geometrically frustrated system Co2(OD)3Cl/Co2(OH)3Cl

Xing-Liang Xu, Dong-Dong Meng, Xu-Guang Zheng, Ichihiro Yamauchi, Isao Watanabe, and Qi-Xin Guo

Phys. Rev. B 95, 024111 (2017) - Published 24 January, 2017

First-principles study of paraelectric and ferroelectric CsH2PO4 including dispersion forces: Stability and related vibrational, dielectric, and elastic properties

Benoit Van Troeye, Michiel Jan van Setten, Matteo Giantomassi, Marc Torrent, Gian-Marco Rignanese, and Xavier Gonze

Phys. Rev. B 95, 024112 (2017) - Published 25 January, 2017

Elastic and piezoresistive properties of nickel carbides from first principles

Jeffrey Kelling, Peter Zahn, Jörg Schuster, and Sibylle Gemming

Phys. Rev. B 95, 024113 (2017) - Published 26 January, 2017

Spatial anisotropy of topological domain structure in hexagonal manganites

K. L. Yang, Y. Zhang, S. H. Zheng, L. Lin, Z. B. Yan, J.-M. Liu, and S.-W. Cheong

Phys. Rev. B 95, 024114 (2017) - Published 27 January, 2017

Pressure-driven semiconductor-semiconductor transition and its structural origin in oxygen vacancy ordered SrCoO2.5

Fang Hong, Binbin Yue, Zhenxian Liu, Bin Chen, and Ho-Kwang Mao

Phys. Rev. B 95, 024115 (2017) - Published 30 January, 2017

Relationship between element-selective electronic states and hydrogen absorption properties of Pd-M (M=Ru,Rh,Ag,and Au) alloys

Kanako Fujii, Naoki Ishimatsu, Hiroshi Maruyama, Tatsuya Shishidou, Shinjiro Hayakawa, and Naomi Kawamura

Phys. Rev. B 95, 024116 (2017) - Published 30 January, 2017

Inhomogeneous, disordered, and partially ordered systems

Spin-catalyzed hopping conductivity in disordered strongly interacting quantum wires

S. A. Parameswaran and S. Gopalakrishnan

Phys. Rev. B 95, 024201 (2017) - Published 6 January, 2017

Logarithmic entanglement lightcone in many-body localized systems

Dong-Ling Deng, Xiaopeng Li, J. H. Pixley, Yang-Le Wu, and S. Das Sarma

Phys. Rev. B 95, 024202 (2017) - Published 10 January, 2017

Elastic anharmonicity of bcc Fe and Fe-based random alloys from first-principles calculations

Xiaoqing Li, Stephan Schönecker, Jijun Zhao, Levente Vitos, and Börje Johansson

Phys. Rev. B 95, 024203 (2017) - Published 13 January, 2017

Origin of nonsaturating linear magnetoresistivity

Ferdinand Kisslinger, Christian Ott, and Heiko B. Weber

Phys. Rev. B 95, 024204 (2017) - Published 18 January, 2017

Universal crossover from ground-state to excited-state quantum criticality

Byungmin Kang, Andrew C. Potter, and Romain Vasseur

Phys. Rev. B 95, 024205 (2017) - Published 19 January, 2017

Dynamics, dynamical systems, lattice effects

Atomic dynamics in Zr-based glass forming alloys near the liquidus temperature

Sri Wahyuni Basuki, Fan Yang, Elisabeth Gill, Klaus Rätzke, Andreas Meyer, and Franz Faupel

Phys. Rev. B 95, 024301 (2017) - Published 6 January, 2017

Prethermalization and persistent order in the absence of a thermal phase transition

Jad C. Halimeh, Valentin Zauner-Stauber, Ian P. McCulloch, Inés de Vega, Ulrich Schollwöck, and Michael Kastner

Phys. Rev. B 95, 024302 (2017) - Published 6 January, 2017

Ultrafast relaxation dynamics of photoexcited Dirac fermions in the three-dimensional Dirac semimetal Cd3As2

Wei Lu, Shaofeng Ge, Xuefeng Liu, Hong Lu, Caizhen Li, Jiawei Lai, Chuan Zhao, Zhimin Liao, Shuang Jia, and Dong Sun

Phys. Rev. B 95, 024303 (2017) - Published 10 January, 2017

Enhanced electron-phonon coupling in graphene with periodically distorted lattice

E. Pomarico, M. Mitrano, H. Bromberger, M. A. Sentef, A. Al-Temimy, C. Coletti, A. Stöhr, S. Link, U. Starke, C. Cacho, R. Chapman, E. Springate, A. Cavalleri, and I. Gierz

Phys. Rev. B 95, 024304 (2017) - Published 13 January, 2017

Mode decomposition based on crystallographic symmetry in the band-unfolding method

Yuji Ikeda, Abel Carreras, Atsuto Seko, Atsushi Togo, and Isao Tanaka

Phys. Rev. B 95, 024305 (2017) - Published 13 January, 2017

The band-unfolding method is now widely used to calculate the effective band structures of a disordered system from its supercell model. The unfolded band structures are obtained as if the disordered system really has the crystallographic symmetry of its underlying structure. However, it has still been difficult to decompose the unfolded band structures into the modes based on the crystallographic symmetry of the underlying structure. This has prohibited detailed analyses of, e.g., selection rules and avoided band crossings for the unfolded band structures. The authors here develop a procedure to decompose the unfolded band structures according to the small representations (SRs) of the little groups. The decomposition is performed using the projection operators for SRs derived from the group representation theory. Using this procedure, the authors investigate the phonon band structure of disordered face-centered-cubic Cu0.75Au0.25, which has large variations of atomic masses and force constants among the atomic sites due to the chemical disorder. In the unfolded phonon band structure, several peculiar behaviors such as discontinuous and split branches are found in the decomposed modes corresponding to specific SRs.

Dynamical control of electron-phonon interactions with high-frequency light

C. Dutreix and M. I. Katsnelson

Phys. Rev. B 95, 024306 (2017) - Published 17 January, 2017

Phonons and elasticity of cementite through the Curie temperature

L. Mauger, J. E. Herriman, O. Hellman, S. J. Tracy, M. S. Lucas, J. A. Muñoz, Yuming Xiao, J. Li, and B. Fultz

Phys. Rev. B 95, 024308 (2017) - Published 20 January, 2017

Post-quench dynamics and suppression of thermalization in an open half-filled Hubbard layer

Igor V. Blinov, Pedro Ribeiro, and A. N. Rubtsov

Phys. Rev. B 95, 024309 (2017) - Published 20 January, 2017

Role of interactions in a dissipative many-body localized system

Benjamin Everest, Igor Lesanovsky, Juan P. Garrahan, and Emanuele Levi

Phys. Rev. B 95, 024310 (2017) - Published 23 January, 2017

First-principles calculation of lattice thermal conductivity in crystalline phase change materials: GeTe, Sb2Te3, and Ge2Sb2Te5

Davide Campi, Lorenzo Paulatto, Giorgia Fugallo, Francesco Mauri, and Marco Bernasconi

Phys. Rev. B 95, 024311 (2017) - Published 24 January, 2017

Generation of acoustic helical wavefronts using metasurfaces

Hussein Esfahlani, Herve Lissek, and Juan R. Mosig

Phys. Rev. B 95, 024312 (2017) - Published 30 January, 2017

Magnetism

Stripe order on the spin-1 stacked honeycomb lattice in Ba2Ni(PO4)2

Arvind Yogi, A. K. Bera, Arvind Maurya, Ruta Kulkarni, S. M. Yusuf, A. Hoser, A. A. Tsirlin, and A. Thamizhavel

Phys. Rev. B 95, 024401 (2017) - Published 3 January, 2017

Size and temperature dependence of the line shape of ESR spectra of the XXZ antiferromagnetic chain

Hiroki Ikeuchi, Hans De Raedt, Sylvain Bertaina, and Seiji Miyashita

Phys. Rev. B 95, 024402 (2017) - Published 4 January, 2017

Topological constraints on positions of magnetic solitons in multiply connected planar magnetic nanoelements

Andrei B. Bogatyrëv and Konstantin L. Metlov

Phys. Rev. B 95, 024403 (2017) - Published 4 January, 2017

Adiabatic physics of an exchange-coupled spin-dimer system: Magnetocaloric effect, zero-point fluctuations, and possible two-dimensional universal behavior

J. Brambleby, P. A. Goddard, J. Singleton, M. Jaime, T. Lancaster, L. Huang, J. Wosnitza, C. V. Topping, K. E. Carreiro, H. E. Tran, Z. E. Manson, and J. L. Manson

Phys. Rev. B 95, 024404 (2017) - Published 5 January, 2017

Magnetic structure of La8Cu7O19

K. Prokeš, E. Ressouche, A. Mohan, A. U. B. Wolter, B. Büchner, and C. Hess

Phys. Rev. B 95, 024405 (2017) - Published 5 January, 2017

Magnetic properties of bilayer Sr3Ir2O7: Role of epitaxial strain and oxygen vacancies

Bongjae Kim, Peitao Liu, and Cesare Franchini

Phys. Rev. B 95, 024406 (2017) - Published 6 January, 2017

Effect of negative chemical pressure on the prototypical itinerant magnet MnSi

C. Dhital, M. A. Khan, M. Saghayezhian, W. A. Phelan, D. P. Young, R. Y. Jin, and J. F. DiTusa

Phys. Rev. B 95, 024407 (2017) - Published 9 January, 2017

Chiral charge pumping in graphene deposited on a magnetic insulator

Michael Evelt, Hector Ochoa, Oleksandr Dzyapko, Vladislav E. Demidov, Avgust Yurgens, Jie Sun, Yaroslav Tserkovnyak, Vladimir Bessonov, Anatoliy B. Rinkevich, and Sergej O. Demokritov

Phys. Rev. B 95, 024408 (2017) - Published 9 January, 2017

Yttrium iron garnet (YIG) holds a special place among all magnetic materials since it shows an unprecedentedly small magnetic damping, resulting in the narrowest known line in ferromagnetic resonance and enabling propagation of spin waves over long distances. Due to these unique characteristics, YIG films have been recently considered as a promising material for spintronic and magnonic applications. By combining YIG and a single layer of graphene in a bilayer, one obtains a unique model system for investigations of magnetic interfacial effects. Here, the authors demonstrate experimentally that the system shows a sizable chiral charge pumping, which could arise from an imbalance of screw dislocations. The effect, which cannot be attributed to the ordinary spin pumping, reveals itself in the creation of a dc electric field/voltage in graphene as a response to the dynamic magnetic excitations (spin waves) in an adjacent out-of-plane magnetized YIG film. The authors show that the induced voltage changes its sign when the orientation of the static magnetization is reversed, clearly indicating the broken mirror reflection symmetry about the planes normal to the graphene/YIG interface. The strength of effect shows a nonmonotonic dependence on the spin-wave frequency, in agreement with the proposed theoretical model.

Skyrmion oscillations in magnetic nanorods with chiral interactions

M. Charilaou and J. F. Löffler

Phys. Rev. B 95, 024409 (2017) - Published 10 January, 2017

Field-induced magnetic states in holmium tetraboride

D. Brunt, G. Balakrishnan, A. R. Wildes, B. Ouladdiaf, N. Qureshi, and O. A. Petrenko

Phys. Rev. B 95, 024410 (2017) - Published 11 January, 2017

Computational investigation of half-Heusler compounds for spintronics applications

Jianhua Ma, Vinay I. Hegde, Kamaram Munira, Yunkun Xie, Sahar Keshavarz, David T. Mildebrath, C. Wolverton, Avik W. Ghosh, and W. H. Butler

Phys. Rev. B 95, 024411 (2017) - Published 11 January, 2017

The authors investigate the properties of 378 half-Heusler compounds using density functional theory with the goal of identifying promising candidates for spintronic applications, e.g. half-metals. Although DFT has often been applied to the search for half-metals, this study may be the most comprehensive attempt to identify which of the compounds predicted by DFT to be half-metals are likely to be fabricated. The calculated formation energy of each of the 378 potential half Heuslers was compared to that of all competing phases and combination of phases in the Open Quantum Materials Database. Those semiconductors, half-metals, and near half-metals within an empirically determined 0.1 eV/atom hull distance margin for neglected effects were deemed of interest for further experimental investigation.

Ultrafast demagnetizing fields from first principles

Jacopo Simoni, Maria Stamenova, and Stefano Sanvito

Phys. Rev. B 95, 024412 (2017) - Published 12 January, 2017

Temperature-dependent first-order reversal curve measurements on unusually hard magnetic low-temperature phase of MnBi

Shreyas Muralidhar, Joachim Gräfe, Yu-Chun Chen, Martin Etter, Giuliano Gregori, Semih Ener, Simon Sawatzki, Kazuhiro Hono, Oliver Gutfleisch, Helmut Kronmüller, Gisela Schütz, and Eberhard J. Goering

Phys. Rev. B 95, 024413 (2017) - Published 12 January, 2017

Thermodynamics and renormalized quasiparticles in the vicinity of the dilute Bose gas quantum critical point in two dimensions

Jan Krieg, Dominik Strassel, Simon Streib, Sebastian Eggert, and Peter Kopietz

Phys. Rev. B 95, 024414 (2017) - Published 13 January, 2017

Tailoring magnetic energies to form dipole skyrmions and skyrmion lattices

S. A. Montoya, S. Couture, J. J. Chess, J. C. T. Lee, N. Kent, D. Henze, S. K. Sinha, M.-Y. Im, S. D. Kevan, P. Fischer, B. J. McMorran, V. Lomakin, S. Roy, and E. E. Fullerton

Phys. Rev. B 95, 024415 (2017) - Published 13 January, 2017

Antiferromagnetism with divalent Eu in EuNi5As3

W. B. Jiang, M. Smidman, W. Xie, J. Y. Liu, J. M. Lee, J. M. Chen, S. C. Ho, H. Ishii, K. D. Tsuei, C. Y. Guo, Y. J. Zhang, Hanoh Lee, and H. Q. Yuan

Phys. Rev. B 95, 024416 (2017) - Published 17 January, 2017

Energy repartition in the nonequilibrium steady state

Peng Yan, Gerrit E. W. Bauer, and Huaiwu Zhang

Phys. Rev. B 95, 024417 (2017) - Published 17 January, 2017

Magnetic anisotropy and conical phase transition in monoaxial chiral magnets

Yusuke Masaki and R. L. Stamps

Phys. Rev. B 95, 024418 (2017) - Published 18 January, 2017

Low-dimensional magnetic properties of orthorhombic MnV2O6: A nonstandard structure stabilized at high pressure

M. L. Hneda, J. B. M. da Cunha, M. A. Gusmão, S. R. Oliveira Neto, J. Rodríguez-Carvajal, and O. Isnard

Phys. Rev. B 95, 024419 (2017) - Published 19 January, 2017

Nonequilibrium quantum mechanics: A “hot quantum soup” of paramagnons

H. D. Scammell and O. P. Sushkov

Phys. Rev. B 95, 024420 (2017) - Published 20 January, 2017

Quantum spin liquid ground states of the Heisenberg-Kitaev model on the triangular lattice

Pavel Kos and Matthias Punk

Phys. Rev. B 95, 024421 (2017) - Published 20 January, 2017

Antiferromagnetic coupling between martensitic twin variants observed by magnetic resonance in Ni-Mn-Sn-Co films

V. O. Golub, V. A. Lvov, I. Aseguinolaza, O. Salyuk, D. Popadiuk, Y. Kharlan, G. N. Kakazei, J. P. Araujo, J. M. Barandiaran, and V. A. Chernenko

Phys. Rev. B 95, 024422 (2017) - Published 23 January, 2017

Competing exchange interactions in multiferroic and ferrimagnetic CaBaCo4O7

R. S. Fishman, S. Bordács, V. Kocsis, I. Kézsmárki, J. Viirok, U. Nagel, T. Rõõm, A. Puri, U. Zeitler, Y. Tokunaga, Y. Taguchi, and Y. Tokura

Phys. Rev. B 95, 024423 (2017) - Published 23 January, 2017

Emergent incommensurate correlations in frustrated ferromagnetic spin-1 chains

Hyeong Jun Lee, MooYoung Choi, and Gun Sang Jeon

Phys. Rev. B 95, 024424 (2017) - Published 23 January, 2017

Correlations and dynamics of spins in an XY-like spin-glass (Ni0.4Mn0.6)TiO3 single-crystal system

R. S. Solanki, S.-H. Hsieh, C. H. Du, G. Deng, C. W. Wang, J. S. Gardner, H. Tonomoto, T. Kimura, and W. F. Pong

Phys. Rev. B 95, 024425 (2017) - Published 23 January, 2017

Phase diagram and spin correlations of the Kitaev-Heisenberg model: Importance of quantum effects

Dorota Gotfryd, Juraj Rusnačko, Krzysztof Wohlfeld, George Jackeli, Jiří Chaloupka, and Andrzej M. Oleś

Phys. Rev. B 95, 024426 (2017) - Published 23 January, 2017

Magnetic resonances of multiferroic TbFe3(BO3)4

Dávid Szaller, Vilmos Kocsis, Sándor Bordács, Titusz Fehér, Toomas Rõõm, Urmas Nagel, Hans Engelkamp, Kenya Ohgushi, and István Kézsmárki

Phys. Rev. B 95, 024427 (2017) - Published 24 January, 2017

Complex magnetic phase diagram with multistep spin-flop transitions in La0.25Pr0.75Co2P2

Xiaoyan Tan, V. Ovidiu Garlea, Kirill Kovnir, Corey M. Thompson, Tongshuai Xu, Huibo Cao, Ping Chai, Zachary P. Tener, Shishen Yan, Peng Xiong, and Michael Shatruk

Phys. Rev. B 95, 024428 (2017) - Published 24 January, 2017

Symmetry breaking, slow relaxation dynamics, and topological defects at the field-induced helix reorientation in MnSi

A. Bauer, A. Chacon, M. Wagner, M. Halder, R. Georgii, A. Rosch, C. Pfleiderer, and M. Garst

Phys. Rev. B 95, 024429 (2017) - Published 25 January, 2017

The Dzyaloshinskii-Moriya interaction in the cubic chiral magnet MnSi stabilizes a magnetic helix - a periodic one-dimensional modulation of the magnetization. The orientation of this helix is determined by weak magnetocrystalline anisotropies, but it can be reoriented by applying a magnetic field. Here, the authors have studied this reorientation process by means of small-angle neutron scattering and susceptibility measurements. Their results are in excellent agreement with predictions of an effective mean-field theory taking into account the precise symmetries of the crystal structure. Measurements of the magnetization and ac susceptibility provide evidence that the reorientation of helimagnetic domains is associated with large relaxation times exceeding seconds. In addition, hysteresis at the Ising transitions indicates, within the same theoretical framework, the formation of an abundance of plastic deformations of the helical spin order. These deformations comprise topologically nontrivial disclinations, reminiscent of the skyrmions discovered recently in the same class of materials.

Dynamics of linarite: Observations of magnetic excitations

K. C. Rule, B. Willenberg, M. Schäpers, A. U. B. Wolter, B. Büchner, S.-L. Drechsler, G. Ehlers, D. A. Tennant, R. A. Mole, J. S. Gardner, S. Süllow, and S. Nishimoto

Phys. Rev. B 95, 024430 (2017) - Published 26 January, 2017

Long-range Heisenberg models in quasiperiodically driven crystals of trapped ions

A. Bermudez, L. Tagliacozzo, G. Sierra, and P. Richerme

Phys. Rev. B 95, 024431 (2017) - Published 30 January, 2017

Cationic order versus La-O covalency in LaA(Ca,Ba)VMoO6 double perovskites

Abhisek Bandyopadhyay, Swarup Kumar Neogi, Atanu Paul, Carlo Meneghini, Indra Dasgupta, Sudipta Bandyopadhyay, and Sugata Ray

Phys. Rev. B 95, 024432 (2017) - Published 30 January, 2017

Structure and physical properties of SrNiRu5O11 single crystals: An R-type ferrite based on ordered kagome nets

L. Shlyk, L. E. De Long, and R. Niewa

Phys. Rev. B 95, 024433 (2017) - Published 30 January, 2017

Properties of rare-earth iron garnets from first principles

Ryan Nakamoto, Bin Xu, Changsong Xu, Hu Xu, and L. Bellaiche

Phys. Rev. B 95, 024434 (2017) - Published 31 January, 2017

Superfluidity and superconductivity

Clocking the onset of bilayer coherence in a high-Tc cuprate

Edoardo Baldini, Andreas Mann, Benjamin P. P. Mallett, Christopher Arrell, Frank van Mourik, Thomas Wolf, Dragan Mihailovic, Jeffrey L. Tallon, Christian Bernhard, José Lorenzana, and Fabrizio Carbone

Phys. Rev. B 95, 024501 (2017) - Published 3 January, 2017

Self-consistent Bogoliubov–de Gennes theory of the vortex lattice state in a two-dimensional strongly type-II superconductor at high magnetic fields

Vladimir Zhuravlev, Wenye Duan, and Tsofar Maniv

Phys. Rev. B 95, 024502 (2017) - Published 3 January, 2017

Proximity-induced minimum radius of superconducting thin rings closed by the Josephson 0 or π junction

Yu. S. Barash

Phys. Rev. B 95, 024503 (2017) - Published 3 January, 2017

Development of spin-wave-like dispersive excitations below the pseudogap temperature in the high-temperature superconductor La2xSrxCuO4

M. Matsuura, S. Kawamura, M. Fujita, R. Kajimoto, and K. Yamada

Phys. Rev. B 95, 024504 (2017) - Published 9 January, 2017

Prediction of phonon-mediated superconductivity in borophene

Miao Gao, Qi-Zhi Li, Xun-Wang Yan, and Jun Wang

Phys. Rev. B 95, 024505 (2017) - Published 10 January, 2017

Universal properties of high-temperature superconductors from real-space pairing: tJU model and its quantitative comparison with experiment

Józef Spałek, Michał Zegrodnik, and Jan Kaczmarczyk

Phys. Rev. B 95, 024506 (2017) - Published 13 January, 2017

Nodal lines and nodal loops in nonsymmorphic odd-parity superconductors

T. Micklitz and M. R. Norman

Phys. Rev. B 95, 024508 (2017) - Published 17 January, 2017

Superconductivity on a quasiperiodic lattice: Extended-to-localized crossover of Cooper pairs

Shiro Sakai, Nayuta Takemori, Akihisa Koga, and Ryotaro Arita

Phys. Rev. B 95, 024509 (2017) - Published 18 January, 2017

Pressure-induced superconductivity in Bi single crystals

Yufeng Li, Enyu Wang, Xiyu Zhu, and Hai-Hu Wen

Phys. Rev. B 95, 024510 (2017) - Published 20 January, 2017

Order parameter fluctuation and ordering competition in Ba1xKxFe2As2

Jing Wang, Guo-Zhu Liu, Dmitry V. Efremov, and Jeroen van den Brink

Phys. Rev. B 95, 024511 (2017) - Published 20 January, 2017

Magnetic-field-induced vortex-lattice transition in HgBa2CuO4+δ

Jeongseop A. Lee, Yizhou Xin, I. Stolt, W. P. Halperin, A. P. Reyes, P. L. Kuhns, and M. K. Chan

Phys. Rev. B 95, 024512 (2017) - Published 23 January, 2017

Theory of surface spectroscopy for noncentrosymmetric superconductors

Niclas Wennerdal and Matthias Eschrig

Phys. Rev. B 95, 024513 (2017) - Published 24 January, 2017

Magnetoanisotropic Josephson effect due to interfacial spin-orbit fields in superconductor/ferromagnet/superconductor junctions

Andreas Costa, Petra Högl, and Jaroslav Fabian

Phys. Rev. B 95, 024514 (2017) - Published 26 January, 2017

Band geometry, Berry curvature, and superfluid weight

Long Liang, Tuomas I. Vanhala, Sebastiano Peotta, Topi Siro, Ari Harju, and Päivi Törmä

Phys. Rev. B 95, 024515 (2017) - Published 27 January, 2017

Thermal Hall conductivity in the spin-triplet superconductor with broken time-reversal symmetry

Yoshiki Imai, Katsunori Wakabayashi, and Manfred Sigrist

Phys. Rev. B 95, 024516 (2017) - Published 30 January, 2017

Phase diagram of dirty two-band superconductors and observability of impurity-induced s+is state

Mihail Silaev, Julien Garaud, and Egor Babaev

Phys. Rev. B 95, 024517 (2017) - Published 30 January, 2017

Large thermoelectric effect in ballistic Andreev interferometers

Mikhail S. Kalenkov and Andrei D. Zaikin

Phys. Rev. B 95, 024518 (2017) - Published 31 January, 2017

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