Electronic and magnetic properties of single Fe atoms on a CuN surface: Effects of electron correlations
S. K. Panda, I. Di Marco, O. Grånäs, O. Eriksson, and J. Fransson
Phys. Rev. B 93, 140101(R) (2016) - Published 4 April, 2016
G. J. Shu and F. C. Chou
Phys. Rev. B 93, 140402(R) (2016) - Published 5 April, 2016
The authors continue efforts to understand the origin of the peculiar phenomenon revealed in the electronic and magnetic properties of NaCoO. From ac and dc spin susceptibility measurements, they confirm the key role of the Co intermediate spin state. This research should also have bearing on other layered transition metal oxides.
Kyongmo An, Xin Ma, Chi-Feng Pai, Jusang Yang, Kevin S. Olsson, James L. Erskine, Daniel C. Ralph, Robert A. Buhrman, and Xiaoqin Li
Phys. Rev. B 93, 140404(R) (2016) - Published 11 April, 2016
Current control of magnetism, especially in multilayer thin films, hold great promise for applications in spintronics. Efficient control can be achieved using spin-orbit torques originating from either the spin Hall effect or the Rashba effect. In the context of spin waves, direct current pass through a heavy metal/ferromagnetic bilayer may be used to reduce/amplify damping or shift the resonant field. The effective field or damping introduced by the spin Hall or the Rashba effects depends on the current linearly, reversing the sign with a direct current in the opposite direction. The authors of this study report unexpected symmetric magnetic resonance shifts for spin waves passing through a CoFeB/Ta waveguide. This second-order effect arises from the dc modified magnetic anisotropy via anisotropic stress introduced between the substrate and the bilayer. Similar current-induced magnetoelastic effects may be relevant in many ferromagnetic heterostructures subject to large direct current.
S. Holenstein, U. Pachmayr, Z. Guguchia, S. Kamusella, R. Khasanov, A. Amato, C. Baines, H.-H. Klauss, E. Morenzoni, D. Johrendt, and H. Luetkens
Phys. Rev. B 93, 140506(R) (2016) - Published 25 April, 2016
The family of iron-based superconductors has recently acquired a new member material, FeS. Theoretically, this compound has been shown to have electronic structure similar to that of the superconducting FeSe. However, contradictory ground states have been predicted for FeS. In this work, a collaboration of authors from Switzerland and Germany use muon spin rotation and relaxation to show that weak-moment magnetism microscopically coexists with bulk superconductivity. Additionally, in contrast with some earlier studies, the results suggest a fully gapped superconducting state of FeS.
Anand Chandrasekaran, Xian-Kui Wei, Ludwig Feigl, Dragan Damjanovic, Nava Setter, and Nicola Marzari
Phys. Rev. B 93, 144102 (2016) - Published 4 April, 2016
Using a combination of first-principles calculation and high-resolution scanning TEM, the authors report novel structural characteristics of the ferreoelastic 90 domain wall in PbTiO. They highlight the discovery of a sharp discontinuity in the variation of the lattice parameters across the domain wall. The first-principles calculations show that oxygen vacancies prefer to cluster in the plane adjacent to the asymmetric domain walls. Understanding interaction of oxygen vacancies with domain walls is important because such defects are used to tailor properties of ferroelectric materials
D. Yang, T. Chatterji, J. A. Schiemer, and M. A. Carpenter
Phys. Rev. B 93, 144109 (2016) - Published 11 April, 2016
The authors have used resonant ultrasound spectroscopy to characterize variations in the elastic and anelastic properties of GeTe associated with the ferroelectric/ferroelastic phase transition at ~625 K. These arise as a consequence of strong coupling between strain and driving order parameter, and their magnitudes are permissive of a significant order/disorder component to the transition. Remarkably, precursor softening due to dynamical disorder and Debye freezing of twin walls at low temperatures appear both to be controlled by the same thermally activated mechanism associated with small displacements of Ge within GeTe octahedra. This mechanism must also be important in constraining the stability and dynamics with respect to ferroelectric switching.
T. R. Kirkpatrick and D. Belitz
Phys. Rev. B 93, 144203 (2016) - Published 19 April, 2016
Numerous experiments on solids in the vicinity of first-order phase transitions indicate that the two phases can coexist in equilibrium even away from coexistence curve, which seems to defy basic notions of thermodynamics. Examples include the magnetic quantum phase transition in the helical magnet MnSi, and the Mott transition in the rare-earth nickelates. Muon spin rotation experiments show that the volume fraction of the magnetic phase is less than 100% in a region away from the coexistence curve of the first-order phase transition. The authors provide an explanation for these puzzling observations: imperfections in the solid material can lead to small regions in space that locally favor one phase over the other. As a result, the material will not be homogeneous, but rather contain droplets of one phase within the other. These droplets are stable, and last indefinitely. The system thus never attains the equilibrium state one would naively expect, in which all of the volume would be taken up by one of the phases.
Chi-Feng Pai, Maxwell Mann, Aik Jun Tan, and Geoffrey S. D. Beach
Phys. Rev. B 93, 144409 (2016) - Published 8 April, 2016
Current-induced spin-orbit torque (SOT) in magnetic heterostructures with perpendicular magnetic anisotropy is an efficient mechanism to control the magnetic moments therein. The authors present a Hall-voltage-based technique that allows them to simultaneously determine two key physical quantities describing SOT in magnetic heterostructures: the SOT efficiency and the magnitude of effective Dzyaloshinskii-Moriya interaction field. With the help of this new technique, the authors find that the spin-orbit torque, apart from the conventional spin-Hall-induced contribution, includes another geometrical component that depends on the shape of the ferromagnetic layer of the heterostructure. This opens a possibility for engineering SOT switching without any aid of external magnetic field, with possible applications for magnetic random access memory applications.
Yasir Iqbal, Wen-Jun Hu, Ronny Thomale, Didier Poilblanc, and Federico Becca
Phys. Rev. B 93, 144411 (2016) - Published 11 April, 2016
The search for unconventional phases of matter, such as quantum spin liquids (QSL), is one of the fundamental and most debated issues in condensed matter physics. While gapped spin liquids have been widely studied and are now accepted to exist in nature, the existence and stability of gapless spin liquids is more controversial. The authors present their analysis of the frustrated antiferromagnetic spin model on a triangular lattice, which has been suggested very recently as a platform to host QSLs. They use a combination of several numerical techniques to show that a gapless spin liquid, which can be described via emergent interacting Dirac fermions, proves to be an excellent candidate ground state to describe the frustrated regime for the spin model.
C. Carbillet, S. Caprara, M. Grilli, C. Brun, T. Cren, F. Debontridder, B. Vignolle, W. Tabis, D. Demaille, L. Largeau, K. Ilin, M. Siegel, D. Roditchev, and B. Leridon
Phys. Rev. B 93, 144509 (2016) - Published 15 April, 2016
How a disordered superconductor evolves into an insulator is still a matter of intense debate. Disorder and reduced screening of Coulomb repulsion may simply break the pairs or, alternatively, the Cooper pairs themselves may localize. Thin disordered NbN films fall between these two extremes and display intermediate scale inhomogeneity with anomalous properties, which are studied by the authors using Scanning Tunneling Spectroscopy and transport measurements. While STS exhibits inhomogeneity at distances much larger the typical size of the nanocrystals constituting the NbN films, the conductivity fluctuations near the superconductor-insulator transition have effectively a zero-dimensional character similar to the one previously found only in granular systems.
S. K. Panda, I. Di Marco, O. Grånäs, O. Eriksson, and J. Fransson
Phys. Rev. B 93, 140101(R) (2016) - Published 4 April, 2016
Jeffrey L. Braun, Christopher H. Baker, Ashutosh Giri, Mirza Elahi, Kateryna Artyushkova, Thomas E. Beechem, Pamela M. Norris, Zayd C. Leseman, John T. Gaskins, and Patrick E. Hopkins
Phys. Rev. B 93, 140201(R) (2016) - Published 1 April, 2016
Mario Žic, Karsten Rode, Naganivetha Thiyagarajah, Yong-Chang Lau, Davide Betto, J. M. D. Coey, Stefano Sanvito, Kerry J. O'Shea, Ciaran A. Ferguson, Donald A. MacLaren, and Thomas Archer
Phys. Rev. B 93, 140202(R) (2016) - Published 1 April, 2016
G. Zhao, Y. J. Yu, J. L. Yan, M. C. Ding, X. G. Zhao, and H. Y. Wang
Phys. Rev. B 93, 140203(R) (2016) - Published 5 April, 2016
Jun Ding, Mark Asta, and Robert O. Ritchie
Phys. Rev. B 93, 140204(R) (2016) - Published 8 April, 2016
Nobuyuki Okuma and Masao Ogata
Phys. Rev. B 93, 140205(R) (2016) - Published 20 April, 2016
N. J. van der Kaap, I. Katsouras, K. Asadi, P. W. M. Blom, L. J. A. Koster, and D. M. de Leeuw
Phys. Rev. B 93, 140206(R) (2016) - Published 25 April, 2016
V. S. Bhat, F. Heimbach, I. Stasinopoulos, and D. Grundler
Phys. Rev. B 93, 140401(R) (2016) - Published 5 April, 2016
G. J. Shu and F. C. Chou
Phys. Rev. B 93, 140402(R) (2016) - Published 5 April, 2016
The authors continue efforts to understand the origin of the peculiar phenomenon revealed in the electronic and magnetic properties of NaCoO. From ac and dc spin susceptibility measurements, they confirm the key role of the Co intermediate spin state. This research should also have bearing on other layered transition metal oxides.
Jinchen Wang, Juanjuan Liu, Jieming Sheng, Wei Luo, Feng Ye, Zhiying Zhao, Xuefeng Sun, Sergey A. Danilkin, Guochu Deng, and Wei Bao
Phys. Rev. B 93, 140403(R) (2016) - Published 6 April, 2016
Kyongmo An, Xin Ma, Chi-Feng Pai, Jusang Yang, Kevin S. Olsson, James L. Erskine, Daniel C. Ralph, Robert A. Buhrman, and Xiaoqin Li
Phys. Rev. B 93, 140404(R) (2016) - Published 11 April, 2016
Current control of magnetism, especially in multilayer thin films, hold great promise for applications in spintronics. Efficient control can be achieved using spin-orbit torques originating from either the spin Hall effect or the Rashba effect. In the context of spin waves, direct current pass through a heavy metal/ferromagnetic bilayer may be used to reduce/amplify damping or shift the resonant field. The effective field or damping introduced by the spin Hall or the Rashba effects depends on the current linearly, reversing the sign with a direct current in the opposite direction. The authors of this study report unexpected symmetric magnetic resonance shifts for spin waves passing through a CoFeB/Ta waveguide. This second-order effect arises from the dc modified magnetic anisotropy via anisotropic stress introduced between the substrate and the bilayer. Similar current-induced magnetoelastic effects may be relevant in many ferromagnetic heterostructures subject to large direct current.
L. Thevenard, I. S. Camara, J.-Y. Prieur, P. Rovillain, A. Lemaître, C. Gourdon, and J.-Y. Duquesne
Phys. Rev. B 93, 140405(R) (2016) - Published 11 April, 2016
R. C. Williams, F. Xiao, T. Lancaster, R. De Renzi, G. Allodi, S. Bordignon, P. G. Freeman, F. L. Pratt, S. R. Giblin, J. S. Möller, S. J. Blundell, A. T. Boothroyd, and D. Prabhakaran
Phys. Rev. B 93, 140406(R) (2016) - Published 14 April, 2016
S. M. Disseler, J. W. Lynn, R. F. Jardim, M. S. Torikachvili, and E. Granado
Phys. Rev. B 93, 140407(R) (2016) - Published 15 April, 2016
P. Khuntia, R. Kumar, A. V. Mahajan, M. Baenitz, and Y. Furukawa
Phys. Rev. B 93, 140408(R) (2016) - Published 18 April, 2016
Hyun Seok Lee, Min Su Kim, Hyun Kim, and Young Hee Lee
Phys. Rev. B 93, 140409(R) (2016) - Published 19 April, 2016
Hong Xia, Jie Chen, Xiaoyan Zeng, and Ming Yan
Phys. Rev. B 93, 140410(R) (2016) - Published 20 April, 2016
Bassel Alkadour, J. I. Mercer, J. P. Whitehead, J. van Lierop, and B. W. Southern
Phys. Rev. B 93, 140411(R) (2016) - Published 22 April, 2016
T. Lancaster, F. Xiao, Z. Salman, I. O. Thomas, S. J. Blundell, F. L. Pratt, S. J. Clark, T. Prokscha, A. Suter, S. L. Zhang, A. A. Baker, and T. Hesjedal
Phys. Rev. B 93, 140412(R) (2016) - Published 25 April, 2016
Artur Glavic, Hemant Dixit, Valentino R. Cooper, and Adam A. Aczel
Phys. Rev. B 93, 140413(R) (2016) - Published 27 April, 2016
D. Chen, T.-T. Zhang, Z.-D. Song, H. Li, W.-L. Zhang, T. Qian, J.-L. Luo, Y.-G. Shi, Z. Fang, P. Richard, and H. Ding
Phys. Rev. B 93, 140501(R) (2016) - Published 4 April, 2016
Q.-P. Ding, P. Wiecki, V. K. Anand, N. S. Sangeetha, Y. Lee, D. C. Johnston, and Y. Furukawa
Phys. Rev. B 93, 140502(R) (2016) - Published 7 April, 2016
Michael Schecter, Karsten Flensberg, Morten H. Christensen, Brian M. Andersen, and Jens Paaske
Phys. Rev. B 93, 140503(R) (2016) - Published 11 April, 2016
Yan-Feng Lv, Wen-Lin Wang, Hao Ding, Yang Wang, Ying Ding, Ruidan Zhong, John Schneeloch, G. D. Gu, Lili Wang, Ke He, Shuai-Hua Ji, Lin Zhao, Xing-Jiang Zhou, Can-Li Song, Xu-Cun Ma, and Qi-Kun Xue
Phys. Rev. B 93, 140504(R) (2016) - Published 15 April, 2016
Kazutaka Kudo, Hiroyuki Ishii, and Minoru Nohara
Phys. Rev. B 93, 140505(R) (2016) - Published 25 April, 2016
S. Holenstein, U. Pachmayr, Z. Guguchia, S. Kamusella, R. Khasanov, A. Amato, C. Baines, H.-H. Klauss, E. Morenzoni, D. Johrendt, and H. Luetkens
Phys. Rev. B 93, 140506(R) (2016) - Published 25 April, 2016
The family of iron-based superconductors has recently acquired a new member material, FeS. Theoretically, this compound has been shown to have electronic structure similar to that of the superconducting FeSe. However, contradictory ground states have been predicted for FeS. In this work, a collaboration of authors from Switzerland and Germany use muon spin rotation and relaxation to show that weak-moment magnetism microscopically coexists with bulk superconductivity. Additionally, in contrast with some earlier studies, the results suggest a fully gapped superconducting state of FeS.
Victor Tkachenko, Nikita Medvedev, Zheng Li, Przemysław Piekarz, and Beata Ziaja
Phys. Rev. B 93, 144101 (2016) - Published 1 April, 2016
Anand Chandrasekaran, Xian-Kui Wei, Ludwig Feigl, Dragan Damjanovic, Nava Setter, and Nicola Marzari
Phys. Rev. B 93, 144102 (2016) - Published 4 April, 2016
Using a combination of first-principles calculation and high-resolution scanning TEM, the authors report novel structural characteristics of the ferreoelastic 90 domain wall in PbTiO. They highlight the discovery of a sharp discontinuity in the variation of the lattice parameters across the domain wall. The first-principles calculations show that oxygen vacancies prefer to cluster in the plane adjacent to the asymmetric domain walls. Understanding interaction of oxygen vacancies with domain walls is important because such defects are used to tailor properties of ferroelectric materials
Thomas Gruber, Silvia Bahmann, and Jens Kortus
Phys. Rev. B 93, 144104 (2016) - Published 6 April, 2016
Meysam Pazoki, T. Jesper Jacobsson, Anders Hagfeldt, Gerrit Boschloo, and Tomas Edvinsson
Phys. Rev. B 93, 144105 (2016) - Published 7 April, 2016
A. Breidi, S. G. Fries, and A. V. Ruban
Phys. Rev. B 93, 144106 (2016) - Published 7 April, 2016
Hantao Zhang, Sanxi Yao, and Michael Widom
Phys. Rev. B 93, 144107 (2016) - Published 8 April, 2016
László Z. Tóth, Lajos Daróczi, Sándor Szabó, and Dezső L. Beke
Phys. Rev. B 93, 144108 (2016) - Published 11 April, 2016
D. Yang, T. Chatterji, J. A. Schiemer, and M. A. Carpenter
Phys. Rev. B 93, 144109 (2016) - Published 11 April, 2016
The authors have used resonant ultrasound spectroscopy to characterize variations in the elastic and anelastic properties of GeTe associated with the ferroelectric/ferroelastic phase transition at ~625 K. These arise as a consequence of strong coupling between strain and driving order parameter, and their magnitudes are permissive of a significant order/disorder component to the transition. Remarkably, precursor softening due to dynamical disorder and Debye freezing of twin walls at low temperatures appear both to be controlled by the same thermally activated mechanism associated with small displacements of Ge within GeTe octahedra. This mechanism must also be important in constraining the stability and dynamics with respect to ferroelectric switching.
Eunkoo Lee, Kwang-Ryeol Lee, M. I. Baskes, and Byeong-Joo Lee
Phys. Rev. B 93, 144110 (2016) - Published 11 April, 2016
Prasanna V. Balachandran, Dezhen Xue, and Turab Lookman
Phys. Rev. B 93, 144111 (2016) - Published 11 April, 2016
C. Menéndez, A. Lobato, D. Abbasi-Pérez, J. Fernández-Núñez, V. G. Baonza, and J. M. Recio
Phys. Rev. B 93, 144112 (2016) - Published 13 April, 2016
M. Mtebwa, A. K. Tagantsev, T. Yamada, P. Gemeiner, B. Dkhil, and N. Setter
Phys. Rev. B 93, 144113 (2016) - Published 14 April, 2016
Hailong Wang, Longwen Zhou, and Y. D. Chong
Phys. Rev. B 93, 144114 (2016) - Published 14 April, 2016
J. Antonowicz, A. Pietnoczka, G. A. Evangelakis, O. Mathon, I. Kantor, S. Pascarelli, A. Kartouzian, T. Shinmei, and T. Irifune
Phys. Rev. B 93, 144115 (2016) - Published 15 April, 2016
Hiroshi Nakajima, Tomoyasu Usui, Yves Joly, Motohiro Suzuki, Yusuke Wakabayashi, Tsuyoshi Kimura, and Yoshikazu Tanaka
Phys. Rev. B 93, 144116 (2016) - Published 18 April, 2016
J. M. Kiat, B. Hehlen, M. Anoufa, C. Bogicevic, C. Curfs, B. Boyer, M. Al-Sabbagh, F. Porcher, and A. Al-Zein
Phys. Rev. B 93, 144117 (2016) - Published 19 April, 2016
Xiang Chen, Leland Harriger, Athena Sefat, R. J. Birgeneau, and Stephen D. Wilson
Phys. Rev. B 93, 144118 (2016) - Published 20 April, 2016
T. D. Swinburne, M. G. Glavicic, K. M. Rahman, N. G. Jones, J. Coakley, D. E. Eakins, T. G. White, V. Tong, D. Milathianaki, G. J. Williams, D. Rugg, A. P. Sutton, and D. Dye
Phys. Rev. B 93, 144119 (2016) - Published 20 April, 2016
Chao Zhang and Michiel Sprik
Phys. Rev. B 93, 144201 (2016) - Published 5 April, 2016
S. Swayamjyoti, J. F. Löffler, and P. M. Derlet
Phys. Rev. B 93, 144202 (2016) - Published 6 April, 2016
T. R. Kirkpatrick and D. Belitz
Phys. Rev. B 93, 144203 (2016) - Published 19 April, 2016
Numerous experiments on solids in the vicinity of first-order phase transitions indicate that the two phases can coexist in equilibrium even away from coexistence curve, which seems to defy basic notions of thermodynamics. Examples include the magnetic quantum phase transition in the helical magnet MnSi, and the Mott transition in the rare-earth nickelates. Muon spin rotation experiments show that the volume fraction of the magnetic phase is less than 100% in a region away from the coexistence curve of the first-order phase transition. The authors provide an explanation for these puzzling observations: imperfections in the solid material can lead to small regions in space that locally favor one phase over the other. As a result, the material will not be homogeneous, but rather contain droplets of one phase within the other. These droplets are stable, and last indefinitely. The system thus never attains the equilibrium state one would naively expect, in which all of the volume would be taken up by one of the phases.
Giacomo Baldi, Valentina M. Giordano, Beatrice Ruta, and Giulio Monaco
Phys. Rev. B 93, 144204 (2016) - Published 22 April, 2016
Clovis Caetano, Keith T. Butler, and Aron Walsh
Phys. Rev. B 93, 144205 (2016) - Published 25 April, 2016
P. Maldonado, L. Paolasini, P. M. Oppeneer, T. R. Forrest, A. Prodi, N. Magnani, A. Bosak, G. H. Lander, and R. Caciuffo
Phys. Rev. B 93, 144301 (2016) - Published 4 April, 2016
F. Grusdt
Phys. Rev. B 93, 144302 (2016) - Published 18 April, 2016
Y. Sivan, S. Rozenberg, and A. Halstuch
Phys. Rev. B 93, 144303 (2016) - Published 19 April, 2016
Benoit Van Troeye, Marc Torrent, and Xavier Gonze
Phys. Rev. B 93, 144304 (2016) - Published 20 April, 2016
Pedro Ribeiro, Andrey E. Antipov, and Alexey N. Rubtsov
Phys. Rev. B 93, 144305 (2016) - Published 25 April, 2016
Shraddha Sharma, Uma Divakaran, Anatoli Polkovnikov, and Amit Dutta
Phys. Rev. B 93, 144306 (2016) - Published 28 April, 2016
Takahiro Mikami, Sota Kitamura, Kenji Yasuda, Naoto Tsuji, Takashi Oka, and Hideo Aoki
Phys. Rev. B 93, 144307 (2016) - Published 29 April, 2016
E. Hassinger, G. Gredat, F. Valade, S. René de Cotret, O. Cyr-Choinière, A. Juneau-Fecteau, J.-Ph. Reid, H. Kim, M. A. Tanatar, R. Prozorov, B. Shen, H.-H. Wen, N. Doiron-Leyraud, and Louis Taillefer
Phys. Rev. B 93, 144401 (2016) - Published 1 April, 2016
S. A. Owerre, A. A. Burkov, and Roger G. Melko
Phys. Rev. B 93, 144402 (2016) - Published 1 April, 2016
Bernd Zimmermann, Phivos Mavropoulos, Nguyen H. Long, Christian-Roman Gerhorst, Stefan Blügel, and Yuriy Mokrousov
Phys. Rev. B 93, 144403 (2016) - Published 4 April, 2016
Jian-Xin Zhu, Marc Janoschek, D. S. Chaves, J. C. Cezar, Tomasz Durakiewicz, Filip Ronning, Yasmine Sassa, Martin Mansson, B. L. Scott, N. Wakeham, Eric D. Bauer, and J. D. Thompson
Phys. Rev. B 93, 144404 (2016) - Published 5 April, 2016
Dongzhe Li, Cyrille Barreteau, and Alexander Smogunov
Phys. Rev. B 93, 144405 (2016) - Published 5 April, 2016
Bastian Henne, Verena Ney, Mariano de Souza, and Andreas Ney
Phys. Rev. B 93, 144406 (2016) - Published 6 April, 2016
M. Ruminy, L. Bovo, E. Pomjakushina, M. K. Haas, U. Stuhr, A. Cervellino, R. J. Cava, M. Kenzelmann, and T. Fennell
Phys. Rev. B 93, 144407 (2016) - Published 6 April, 2016
P. Wills, E. Iacocca, and M. A. Hoefer
Phys. Rev. B 93, 144408 (2016) - Published 7 April, 2016
Chi-Feng Pai, Maxwell Mann, Aik Jun Tan, and Geoffrey S. D. Beach
Phys. Rev. B 93, 144409 (2016) - Published 8 April, 2016
Current-induced spin-orbit torque (SOT) in magnetic heterostructures with perpendicular magnetic anisotropy is an efficient mechanism to control the magnetic moments therein. The authors present a Hall-voltage-based technique that allows them to simultaneously determine two key physical quantities describing SOT in magnetic heterostructures: the SOT efficiency and the magnitude of effective Dzyaloshinskii-Moriya interaction field. With the help of this new technique, the authors find that the spin-orbit torque, apart from the conventional spin-Hall-induced contribution, includes another geometrical component that depends on the shape of the ferromagnetic layer of the heterostructure. This opens a possibility for engineering SOT switching without any aid of external magnetic field, with possible applications for magnetic random access memory applications.
A. Pivano and V. O. Dolocan
Phys. Rev. B 93, 144410 (2016) - Published 11 April, 2016
Yasir Iqbal, Wen-Jun Hu, Ronny Thomale, Didier Poilblanc, and Federico Becca
Phys. Rev. B 93, 144411 (2016) - Published 11 April, 2016
The search for unconventional phases of matter, such as quantum spin liquids (QSL), is one of the fundamental and most debated issues in condensed matter physics. While gapped spin liquids have been widely studied and are now accepted to exist in nature, the existence and stability of gapless spin liquids is more controversial. The authors present their analysis of the frustrated antiferromagnetic spin model on a triangular lattice, which has been suggested very recently as a platform to host QSLs. They use a combination of several numerical techniques to show that a gapless spin liquid, which can be described via emergent interacting Dirac fermions, proves to be an excellent candidate ground state to describe the frustrated regime for the spin model.
Subhro Bhattacharjee, S. Erfanifam, E. L. Green, M. Naumann, Zhaosheng Wang, S. Granovsky, M. Doerr, J. Wosnitza, A. A. Zvyagin, R. Moessner, A. Maljuk, S. Wurmehl, B. Büchner, and S. Zherlitsyn
Phys. Rev. B 93, 144412 (2016) - Published 12 April, 2016
F. A. Gómez Albarracín and H. D. Rosales
Phys. Rev. B 93, 144413 (2016) - Published 14 April, 2016
Mareike Hoyer, Rafael M. Fernandes, Alex Levchenko, and Jörg Schmalian
Phys. Rev. B 93, 144414 (2016) - Published 18 April, 2016
Feng Guo, Jason M. Bartell, and Gregory D. Fuchs
Phys. Rev. B 93, 144415 (2016) - Published 18 April, 2016
R. D. Benguria and M. C. Depassier
Phys. Rev. B 93, 144416 (2016) - Published 21 April, 2016
Regina Galceran, Laura López-Mir, Bernat Bozzo, José Cisneros-Fernández, José Santiso, Lluís Balcells, Carlos Frontera, and Benjamín Martínez
Phys. Rev. B 93, 144417 (2016) - Published 22 April, 2016
Patrick Müller, Johannes Richter, and Oleg Derzhko
Phys. Rev. B 93, 144418 (2016) - Published 22 April, 2016
P. Dalmas de Réotier, A. Maisuradze, A. Yaouanc, B. Roessli, A. Amato, D. Andreica, and G. Lapertot
Phys. Rev. B 93, 144419 (2016) - Published 22 April, 2016
J. Bourhill, N. Kostylev, M. Goryachev, D. L. Creedon, and M. E. Tobar
Phys. Rev. B 93, 144420 (2016) - Published 25 April, 2016
K. Chen, T. Beeck, S. Fiedler, I. Baev, W. Wurth, and M. Martins
Phys. Rev. B 93, 144421 (2016) - Published 27 April, 2016
Eugene M. Chudnovsky
Phys. Rev. B 93, 144422 (2016) - Published 27 April, 2016
Seungha Yoon, Jason Liu, and Robert D. McMichael
Phys. Rev. B 93, 144423 (2016) - Published 28 April, 2016
Dominique Geffroy, Jiří Chaloupka, Thomas Dahm, and Dominik Munzar
Phys. Rev. B 93, 144501 (2016) - Published 1 April, 2016
J. Kačmarčík, Z. Pribulová, T. Samuely, P. Szabó, V. Cambel, J. Šoltýs, E. Herrera, H. Suderow, A. Correa-Orellana, D. Prabhakaran, and P. Samuely
Phys. Rev. B 93, 144502 (2016) - Published 5 April, 2016
Somesh Chandra Ganguli, Harkirat Singh, Indranil Roy, Vivas Bagwe, Dibyendu Bala, Arumugam Thamizhavel, and Pratap Raychaudhuri
Phys. Rev. B 93, 144503 (2016) - Published 6 April, 2016
Daixiang Mou, Soham Manni, Valentin Taufour, Yun Wu, Lunan Huang, S. L. Bud'ko, P. C. Canfield, and Adam Kaminski
Phys. Rev. B 93, 144504 (2016) - Published 7 April, 2016
Hai Lin, Yufeng Li, Qiang Deng, Jie Xing, Jianzhong Liu, Xiyu Zhu, Huan Yang, and Hai-Hu Wen
Phys. Rev. B 93, 144505 (2016) - Published 7 April, 2016
M. A. Sentef, A. F. Kemper, A. Georges, and C. Kollath
Phys. Rev. B 93, 144506 (2016) - Published 8 April, 2016
Guanyu Zhu, Jens Koch, and Ivar Martin
Phys. Rev. B 93, 144508 (2016) - Published 15 April, 2016
C. Carbillet, S. Caprara, M. Grilli, C. Brun, T. Cren, F. Debontridder, B. Vignolle, W. Tabis, D. Demaille, L. Largeau, K. Ilin, M. Siegel, D. Roditchev, and B. Leridon
Phys. Rev. B 93, 144509 (2016) - Published 15 April, 2016
How a disordered superconductor evolves into an insulator is still a matter of intense debate. Disorder and reduced screening of Coulomb repulsion may simply break the pairs or, alternatively, the Cooper pairs themselves may localize. Thin disordered NbN films fall between these two extremes and display intermediate scale inhomogeneity with anomalous properties, which are studied by the authors using Scanning Tunneling Spectroscopy and transport measurements. While STS exhibits inhomogeneity at distances much larger the typical size of the nanocrystals constituting the NbN films, the conductivity fluctuations near the superconductor-insulator transition have effectively a zero-dimensional character similar to the one previously found only in granular systems.
YuanYuan Zhao, Bo Li, Wei Li, Hong-Yi Chen, Kevin E. Bassler, and C. S. Ting
Phys. Rev. B 93, 144510 (2016) - Published 19 April, 2016
Yakov V. Fominov and Mikhail A. Skvortsov
Phys. Rev. B 93, 144511 (2016) - Published 20 April, 2016
R. Bosisio, P. Solinas, A. Braggio, and F. Giazotto
Phys. Rev. B 93, 144512 (2016) - Published 21 April, 2016
Gerald Derondeau, Jürgen Braun, Hubert Ebert, and Ján Minár
Phys. Rev. B 93, 144513 (2016) - Published 25 April, 2016
Yonghui Zhou, Xuliang Chen, Ranran Zhang, Jifeng Shao, Xuefei Wang, Chao An, Ying Zhou, Changyong Park, Wei Tong, Li Pi, Zhaorong Yang, Changjin Zhang, and Yuheng Zhang
Phys. Rev. B 93, 144514 (2016) - Published 26 April, 2016
Yu. G. Naidyuk, G. Fuchs, D. A. Chareev, and A. N. Vasiliev
Phys. Rev. B 93, 144515 (2016) - Published 28 April, 2016