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Localization of Interacting Dirac Fermions (2018)

Tianxing Ma, Lufeng Zhang, Chia-Chen Chang, Hsiang-Hsuan Hung, and Richard T. Scalettar

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-03-13

Beschreibung: Author(s): Tianxing Ma, Lufeng Zhang, Chia-Chen Chang, Hsiang-Hsuan Hung, and Richard T. Scalettar Using exact quantum Monte Carlo calculations, we examine the interplay between localization of electronic states driven by many-body correlations and that by randomness in a two-dimensional system featuring linearly vanishing density of states at the Fermi level. A novel disorder-induced nonmagnetic... [Phys. Rev. Lett. 120, 116601] Published Mon Mar 12, 2018

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Thema: Physik

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Properties of dirty two-band superconductors with repulsive interband interaction: Normal modes, length scales, vortices, and magnetic response (2018)

Julien Garaud, Alberto Corticelli, Mihail Silaev, and Egor Babaev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Julien Garaud, Alberto Corticelli, Mihail Silaev, and Egor Babaev Disorder in two-band superconductors with repulsive interband interaction induces a frustrated competition between the phase-locking preferences of the various potential and kinetic terms. This frustrated interaction can result in the formation of an s + i s superconducting state that breaks the time-r... [Phys. Rev. B 98, 014520] Published Wed Jul 25, 2018

Schlagwort(e): Superfluidity and superconductivity

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Photon-Number-Resolved Measurement of an Exciton-Polariton Condensate (2018)

M. Klaas, E. Schlottmann, H. Flayac, F. P. Laussy, F. Gericke, M. Schmidt, M. v. Helversen, J. Beyer, S. Brodbeck, H. Suchomel, S. Höfling, S. Reitzenstein, and C. Schneider

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): M. Klaas, E. Schlottmann, H. Flayac, F. P. Laussy, F. Gericke, M. Schmidt, M. v. Helversen, J. Beyer, S. Brodbeck, H. Suchomel, S. Höfling, S. Reitzenstein, and C. Schneider By counting the photons emitted from a microcavity, researchers shed light on the nature of an exotic condensate of quasiparticles contained in the cavity. [Phys. Rev. Lett. 121, 047401] Published Wed Jul 25, 2018

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Detecting Superconductivity in the High Pressure Hydrides and Metallic Hydrogen from Optical Properties (2018)

J. P. Carbotte, E. J. Nicol, and T. Timusk

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): J. P. Carbotte, E. J. Nicol, and T. Timusk We present a new technique for measuring the critical temperature T c in the high pressure, high T c electron-phonon-driven superconducting hydrides. This technique does not require connecting leads to the sample. In the region of the absorption spectrum above the sum of the optical gap and maximum ph... [Phys. Rev. Lett. 121, 047002] Published Thu Jul 26, 2018

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Enhanced quasiparticle lifetime in a superconductor by selective blocking of recombination phonons with a phononic crystal (2018)

K. Rostem, P. J. de Visser, and E. J. Wollack

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): K. Rostem, P. J. de Visser, and E. J. Wollack When quasiparticles in a BCS superconductor recombine into Cooper pairs, phonons are emitted within a narrow band of energies above the pairing energy at 2 Δ . We show that a phonon band gap restricting the escape of recombination phonons from a superconductor can increase the quasiparticle recombinat... [Phys. Rev. B 98, 014522] Published Fri Jul 27, 2018

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Spin-orbit-coupled ferroelectric superconductivity (2018)

Shota Kanasugi and Youichi Yanase

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): Shota Kanasugi and Youichi Yanase Motivated by recent studies on ferroelectriclike order coexisting with metallicity, we investigate ferroelectric (FE) superconductivity in which a FE-like structural phase transition occurs in the superconducting state. We consider a two-dimensional s -wave superconductor with Rashba-type antisymmetr... [Phys. Rev. B 98, 024521] Published Fri Jul 27, 2018

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Spatial distribution of superfluidity and superfluid distillation of Bose liquids (2018)

T. J. Volkoff and Yongkyung Kwon

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): T. J. Volkoff and Yongkyung Kwon Under the assumption of two-fluid kinematics of a nonrelativistic Bose liquid in the presence of a local velocity field v ( x ) , local Galilei transformations are used to derive formulas for the spatial distribution of superfluidity. The local formulation is shown to subsume several descriptions of sup... [Phys. Rev. B 98, 014519] Published Wed Jul 25, 2018

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Soft phonons reveal the nematic correlation length in $\mathrm{Ba}{({\mathrm{Fe}}_{0.94}{\mathrm{Co}}_{0.06})}_{2}{\mathrm{As}}_{2}$ (2018)

F. Weber, D. Parshall, L. Pintschovius, J.-P. Castellan, M. Kauth, M. Merz, Th. Wolf, M. Schütt, J. Schmalian, R. M. Fernandes, and D. Reznik

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): F. Weber, D. Parshall, L. Pintschovius, J.-P. Castellan, M. Kauth, M. Merz, Th. Wolf, M. Schütt, J. Schmalian, R. M. Fernandes, and D. Reznik Nematicity is ubiquitous in electronic phases of high- T c superconductors, particularly in the Fe-based systems. While several experiments have probed nematic fluctuations, they have been restricted to uniform or momentum-averaged fluctuations. Here, we investigate the behavior of finite-momentum nem... [Phys. Rev. B 98, 014516] Published Tue Jul 24, 2018

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Resolving different pairing states in Weyl superconductors through the single-particle spectrum (2018)

Tao Zhou, Yi Gao, and Z. D. Wang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Tao Zhou, Yi Gao, and Z. D. Wang We study theoretically single-particle spectra of Weyl superconductors. Three different superconducting pairing states are addressed, which are the BCS-type states with the s -wave pairing symmetry and the p + i p -wave pairing symmetry, and the FFLO pairing state. We elaborate that these three states ca... [Phys. Rev. B 98, 024515] Published Tue Jul 24, 2018

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Light-induced new collective modes in the superconductor ${\mathrm{La}}_{1.905}{\mathrm{Ba}}_{0.095}{\mathrm{CuO}}_{4}$ (2018)

S. J. Zhang, Z. X. Wang, L. Y. Shi, T. Lin, M. Y. Zhang, G. D. Gu, T. Dong, and N. L. Wang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): S. J. Zhang, Z. X. Wang, L. Y. Shi, T. Lin, M. Y. Zhang, G. D. Gu, T. Dong, and N. L. Wang We report near and midinfrared pump, c -axis terahertz probe measurements on a superconducting single crystal La 1.905 Ba 0.095 CuO 4 with T c = 32 K. The measurements reveal that the pump-induced change occurs predominantly at the Josephson plasma edge position below T c . Upon excitation by strong near-infra... [Phys. Rev. B 98, 020506(R)] Published Tue Jul 24, 2018

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Suppression of the magnetic order in CeFeAsO: Nonequivalence of hydrostatic and in-plane chemical pressure (2018)

Philipp Materne, Wenli Bi, Esen Ercan Alp, Jiyong Zhao, Michael Yu Hu, Anton Jesche, Christoph Geibel, Rhea Kappenberger, Saicharan Aswartham, Sabine Wurmehl, Bernd Büchner, Dongzhou Zhang, Til Goltz, Johannes Spehling, and Hans-Henning Klauss

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Philipp Materne, Wenli Bi, Esen Ercan Alp, Jiyong Zhao, Michael Yu Hu, Anton Jesche, Christoph Geibel, Rhea Kappenberger, Saicharan Aswartham, Sabine Wurmehl, Bernd Büchner, Dongzhou Zhang, Til Goltz, Johannes Spehling, and Hans-Henning Klauss We present a detailed investigation of the electronic properties of CeFeAsO under in-plane chemical (As by P substitution) and hydrostatic pressure by means of in-house and synchrotron Mössbauer spectroscopy. The Fe magnetism is suppressed due to both pressures and no magnetic order was observed abo... [Phys. Rev. B 98, 014517] Published Tue Jul 24, 2018

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Spinon Fermi Surface in a Cluster Mott Insulator Model on a Triangular Lattice and Possible Application to $1T\text{−}{\mathrm{Ta}\mathrm{S}}_{2}$ (2018)

Wen-Yu He, Xiao Yan Xu, Gang Chen, K. T. Law, and Patrick A. Lee

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Wen-Yu He, Xiao Yan Xu, Gang Chen, K. T. Law, and Patrick A. Lee 1 T − Ta S 2 is a cluster Mott insulator on the triangular lattice with 13 Ta atoms forming a star of David cluster as the unit cell. We derive a two-dimensional X X Z spin- 1 / 2 model with a four-spin ring exchange term to describe the effective low energy physics of a monolayer 1 T − Ta S 2 , where the effective... [Phys. Rev. Lett. 121, 046401] Published Tue Jul 24, 2018

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Development of Ferromagnetic Fluctuations in Heavily Overdoped $(\mathrm{Bi},\mathrm{Pb}{)}_{2}{\mathrm{Sr}}_{2}{\mathrm{CuO}}_{6+δ}$ Copper Oxides (2018)

Koshi Kurashima, Tadashi Adachi, Kensuke M. Suzuki, Yasushi Fukunaga, Takayuki Kawamata, Takashi Noji, Hitoshi Miyasaka, Isao Watanabe, Masanori Miyazaki, Akihiro Koda, Ryosuke Kadono, and Yoji Koike

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-02

Beschreibung: Author(s): Koshi Kurashima, Tadashi Adachi, Kensuke M. Suzuki, Yasushi Fukunaga, Takayuki Kawamata, Takashi Noji, Hitoshi Miyasaka, Isao Watanabe, Masanori Miyazaki, Akihiro Koda, Ryosuke Kadono, and Yoji Koike We demonstrate the presence of ferromagnetic (FM) fluctuations in the superconducting and nonsuperconducting heavily overdoped regimes of high-temperature superconducting copper oxides, using ( Bi , Pb ) 2 Sr 2 CuO 6 + δ (Bi-2201) single crystals. Magnetization curves exhibit a tendency to be saturated in high... [Phys. Rev. Lett. 121, 057002] Published Wed Aug 01, 2018

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Defect-Assisted Tunneling Electroresistance in Ferroelectric Tunnel Junctions (2018)

Konstantin Klyukin, L. L. Tao, Evgeny Y. Tsymbal, and Vitaly Alexandrov

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-04

Beschreibung: Author(s): Konstantin Klyukin, L. L. Tao, Evgeny Y. Tsymbal, and Vitaly Alexandrov Recent experimental results have demonstrated ferroelectricity in thin films of SrTiO 3 induced by antisite Ti Sr defects. This opens a possibility to use SrTiO 3 as a barrier layer in ferroelectric tunnel junctions (FTJs)—emerging electronic devices promising for applications in nanoelectronics. Here ... [Phys. Rev. Lett. 121, 056601] Published Fri Aug 03, 2018

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Josephson-effect diagnostic of competing orders in quantum critical multiband superconductors (2018)

Maxim Dzero and Alex Levchenko

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Maxim Dzero and Alex Levchenko Motivated by the recent experimentally observed manifestations of the quantum critical point fluctuations in the thermodynamic properties of multiband superconductors, we derive a general expression for the Josephson current of various junctions between two superconductors in the phase of supercondu... [Phys. Rev. B 98, 054501] Published Mon Aug 06, 2018

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Counterpropagating Fractional Hall States in Mirror-Symmetric Dirac Semimetals (2018)

Yafis Barlas

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): Yafis Barlas The Landau bands of mirror symmetric 2D Dirac semimetals (e.g., odd layers of A B A graphene) can be identified by their parity with respect to mirror symmetry. This symmetry facilitates a new class of counterpropagating Hall states. We predict the presence of a Laughlin-like correlated liquid state, ... [Phys. Rev. Lett. 121, 066602] Published Tue Aug 07, 2018

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Generation of Quantized Polaritons below the Condensation Threshold (2018)

Peter Cristofolini, Z. Hatzopoulos, Pavlos G. Savvidis, and Jeremy J. Baumberg

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): Peter Cristofolini, Z. Hatzopoulos, Pavlos G. Savvidis, and Jeremy J. Baumberg Exciton polaritons in high quality semiconductor microcavities can travel long macroscopic distances ( 〉 100 μ m ) due to their ultralight effective mass. The polaritons are repelled from optically pumped exciton reservoirs where they are formed; however, their spatial dynamics is not as expected fo... [Phys. Rev. Lett. 121, 067401] Published Tue Aug 07, 2018

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Magnon Splitting Induced by Charge Transfer in the Three-Orbital Hubbard Model (2018)

Yao Wang, Edwin W. Huang, Brian Moritz, and Thomas P. Devereaux

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-06-12

Beschreibung: Author(s): Yao Wang, Edwin W. Huang, Brian Moritz, and Thomas P. Devereaux Understanding spin excitations and their connection to unconventional superconductivity have remained central issues since the discovery of cuprates. Direct measurement of the dynamical spin structure factor in the parent compounds can provide key information on important interactions relevant in th... [Phys. Rev. Lett. 120, 246401] Published Mon Jun 11, 2018

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Magnetic tricritical point and nematicity in FeSe under pressure (2018)

Rustem Khasanov, Rafael M. Fernandes, Gediminas Simutis, Zurab Guguchia, Alex Amato, Hubertus Luetkens, Elvezio Morenzoni, Xiaoli Dong, Fang Zhou, and Zhongxian Zhao

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-14

Beschreibung: Author(s): Rustem Khasanov, Rafael M. Fernandes, Gediminas Simutis, Zurab Guguchia, Alex Amato, Hubertus Luetkens, Elvezio Morenzoni, Xiaoli Dong, Fang Zhou, and Zhongxian Zhao Magnetism induced by external pressure ( p ) was studied in a FeSe crystal sample by means of muon-spin rotation. The magnetic transition changes from second order to first order for pressures exceeding the critical value p c ≃ 2.4 – 2.5 GPa. The magnetic ordering temperature ( T N ) and the value of the magn... [Phys. Rev. B 97, 224510] Published Wed Jun 13, 2018

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Spin-imbalanced pairing and Fermi surface deformation in flat bands (2018)

Kukka-Emilia Huhtinen, Marek Tylutki, Pramod Kumar, Tuomas I. Vanhala, Sebastiano Peotta, and Päivi Törmä

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): Kukka-Emilia Huhtinen, Marek Tylutki, Pramod Kumar, Tuomas I. Vanhala, Sebastiano Peotta, and Päivi Törmä We study the attractive Hubbard model with spin imbalance on two lattices featuring a flat band: the Lieb and kagome lattices. We present mean-field phase diagrams featuring exotic superfluid phases, similar to the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, whose stability is confirmed by dynami... [Phys. Rev. B 97, 214503] Published Tue Jun 05, 2018

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Distinguishing topological Majorana bound states from trivial Andreev bound states: Proposed tests through differential tunneling conductance spectroscopy (2018)

Chun-Xiao Liu, Jay D. Sau, and S. Das Sarma

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): Chun-Xiao Liu, Jay D. Sau, and S. Das Sarma Trivial Andreev bound states arising from chemical-potential variations could lead to zero-bias tunneling conductance peaks at finite magnetic field in class-D nanowires, precisely mimicking the predicted zero-bias conductance peaks arising from the topological Majorana bound states. This finding ra... [Phys. Rev. B 97, 214502] Published Tue Jun 05, 2018

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Thermoelectric anisotropy in the iron-based superconductor $\mathrm{Ba}{({\mathrm{Fe}}_{1−x}{\mathrm{Co}}_{x})}_{2}{\mathrm{As}}_{2}$ (2018)

Marcin Matusiak, Krzysztof Rogacki, and Thomas Wolf

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): Marcin Matusiak, Krzysztof Rogacki, and Thomas Wolf Nematicity turns out to be a surprisingly common form of self-organization in strongly correlated electronic systems. Its presence along with superconductivity raises the question about a mutual relation between these two types of electronic order as well as about mechanisms that leads to their formation. Here, the authors show that the in-plane anisotropy of the Nernst effect (Δ ν / T ) in detwinned Ba(Fe 1 − x Co x ) 2 As 2 single crystals emerges at a temperature much higher than the temperature of the magnetic transition (TSDW). Furthermore, the temperature dependence of Δ ν / T retains its exponential character below and above TSDW, which suggests that the origin of nematicity might be something different from magnetic. [Phys. Rev. B 97, 220501(R)] Published Tue Jun 05, 2018

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Electron Phonon Coupling versus Photoelectron Energy Loss at the Origin of Replica Bands in Photoemission of FeSe on ${\mathrm{SrTiO}}_{3}$ (2018)

Fengmiao Li and George A. Sawatzky

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): Fengmiao Li and George A. Sawatzky The recent observation of replica bands in single-layer FeSe / SrTiO 3 by angle-resolved photoemission spectroscopy (ARPES) has triggered intense discussions concerning the potential influence of the FeSe electrons coupling with substrate phonons on the superconducting transition temperature. Here we p... [Phys. Rev. Lett. 120, 237001] Published Tue Jun 05, 2018

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Unusual phonon density of states and response to the superconducting transition in the In-doped topological crystalline insulator ${\mathrm{Pb}}_{0.5}{\mathrm{Sn}}_{0.5}\mathrm{Te}$ (2018)

Kejing Ran, Ruidan Zhong, Tong Chen, Yuan Gan, Jinghui Wang, B. L. Winn, A. D. Christianson, Shichao Li, Zhen Ma, Song Bao, Zhengwei Cai, Guangyong Xu, J. M. Tranquada, Genda Gu, Jian Sun, and Jinsheng Wen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-16

Beschreibung: Author(s): Kejing Ran, Ruidan Zhong, Tong Chen, Yuan Gan, Jinghui Wang, B. L. Winn, A. D. Christianson, Shichao Li, Zhen Ma, Song Bao, Zhengwei Cai, Guangyong Xu, J. M. Tranquada, Genda Gu, Jian Sun, and Jinsheng Wen We present inelastic neutron scattering results of phonons in ( Pb 0.5 Sn 0.5 ) 1 − x In x Te powders, with x = 0 and 0.3. The x = 0 sample is a topological crystalline insulator, and the x = 0.3 sample is a superconductor with a bulk superconducting transition temperature T c of 4.7 K. In both samples, we observe un... [Phys. Rev. B 97, 220502(R)] Published Fri Jun 15, 2018

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${Z}_{N}$ Berry Phases in Symmetry Protected Topological Phases (2018)

Toshikaze Kariyado, Takahiro Morimoto, and Yasuhiro Hatsugai

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-06-16

Beschreibung: Author(s): Toshikaze Kariyado, Takahiro Morimoto, and Yasuhiro Hatsugai We show that the Z N Berry phase (Berry phase quantized into 2 π / N ) provides a useful tool to characterize symmetry protected topological phases with correlation that can be directly computed through numerics of a relatively small system size. The Z N Berry phase is defined in a N − 1 -dimensional paramet... [Phys. Rev. Lett. 120, 247202] Published Fri Jun 15, 2018

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Weak metal-metal transition in the vanadium oxytelluride ${\mathrm{Rb}}_{1−δ}{\mathrm{V}}_{2}{\mathrm{Te}}_{2}\mathrm{O}$ (2018)

Abduweli Ablimit, Yun-Lei Sun, Hao Jiang, Si-Qi Wu, Ya-Bin Liu, and Guang-Han Cao

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-21

Beschreibung: Author(s): Abduweli Ablimit, Yun-Lei Sun, Hao Jiang, Si-Qi Wu, Ya-Bin Liu, and Guang-Han Cao We report the synthesis, crystal structure, physical properties, and first-principles calculations of a vanadium-based oxytelluride Rb 1 − δ V 2 Te 2 O ( δ ≈ 0.2 ). The crystal structure bears two-dimensional V 2 O square nets sandwiched with tellurium layers, mimicking the structural motifs of cuprate and iron-b... [Phys. Rev. B 97, 214517] Published Wed Jun 20, 2018

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Large nematic susceptibility in the double-$Q\phantom{\rule{0.16em}{0ex}}{C}_{4}$ magnetic phase of ${\mathrm{Ba}}_{1−x}{\mathrm{Na}}_{x}{\mathrm{Fe}}_{2}{\mathrm{As}}_{2}$ (2018)

Liran Wang, Mingquan He, Frédéric Hardy, Peter Adelmann, Thomas Wolf, Michael Merz, Peter Schweiss, and Christoph Meingast

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-23

Beschreibung: Author(s): Liran Wang, Mingquan He, Frédéric Hardy, Peter Adelmann, Thomas Wolf, Michael Merz, Peter Schweiss, and Christoph Meingast The nematic susceptibility of Ba 1 − x Na x Fe 2 As 2 single crystals is studied by measuring the Young's modulus using a three-point-bending setup in a capacitance dilatometer over a wide doping range. Particular emphasis is placed on the behavior within the double- Q antiferromagnetic C 4 re-entrant phase. H... [Phys. Rev. B 97, 224518] Published Fri Jun 22, 2018

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Topology of Disconnected Elementary Band Representations (2018)

Jennifer Cano, Barry Bradlyn, Zhijun Wang, L. Elcoro, M. G. Vergniory, C. Felser, M. I. Aroyo, and B. Andrei Bernevig

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-06-28

Beschreibung: Author(s): Jennifer Cano, Barry Bradlyn, Zhijun Wang, L. Elcoro, M. G. Vergniory, C. Felser, M. I. Aroyo, and B. Andrei Bernevig A new topological invariant—a movable but unremovable Dirac cone—is identified by considering symmorphic and non-symmorphic space groups of gapped elementary band representations. [Phys. Rev. Lett. 120, 266401] Published Wed Jun 27, 2018

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Quantum Hall Effect with Composites of Magnetic Flux Tubes and Charged Particles (2018)

Marija Todorić, Dario Jukić, Danko Radić, Marin Soljačić, and Hrvoje Buljan

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-06-29

Beschreibung: Author(s): Marija Todorić, Dario Jukić, Danko Radić, Marin Soljačić, and Hrvoje Buljan Composites formed from charged particles and magnetic flux tubes, proposed by Wilczek, are one model for anyons—particles obeying fractional statistics. Here we propose a scheme for realizing charged flux tubes, in which a charged object with an intrinsic magnetic dipole moment is placed between two... [Phys. Rev. Lett. 120, 267201] Published Thu Jun 28, 2018

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Probing the Combined Electromagnetic Local Density of Optical States with Quantum Emitters Supporting Strong Electric and Magnetic Transitions (2018)

Dongfang Li, Sinan Karaveli, Sébastien Cueff, Wenhao Li, and Rashid Zia

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-11-29

Beschreibung: Author(s): Dongfang Li, Sinan Karaveli, Sébastien Cueff, Wenhao Li, and Rashid Zia We experimentally demonstrate that the radiative decay rate of a quantum emitter is determined by the combined electric and magnetic local density of optical states (LDOS). A Drexhage-style experiment was performed for two distinct quantum emitters, divalent nickel ions in magnesium oxide and trival... [Phys. Rev. Lett. 121, 227403] Published Wed Nov 28, 2018

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Josephson coupling in the dissipative state of a thermally hysteretic $μ$-SQUID (2018)

Sourav Biswas, Clemens B. Winkelmann, Hervé Courtois, and Anjan K. Gupta

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-11-28

Beschreibung: Author(s): Sourav Biswas, Clemens B. Winkelmann, Hervé Courtois, and Anjan K. Gupta Micron-sized superconducting interference devices ( μ -SQUIDs) based on constrictions optimized for minimizing thermal runaway are shown to exhibit voltage oscillations with applied magnetic flux despite their hysteretic behavior. We explain this remarkable feature by a significant supercurrent contri... [Phys. Rev. B 98, 174514] Published Tue Nov 27, 2018

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Plasmon-Assisted Resonant Electron Tunneling in a Scanning Tunneling Microscope Junction (2018)

Shuyi Liu, Martin Wolf, and Takashi Kumagai

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-01

Beschreibung: Author(s): Shuyi Liu, Martin Wolf, and Takashi Kumagai We report plasmon-assisted resonant electron tunneling from a Ag or Au tip to field emission resonances (FERs) of a Ag(111) surface induced by cw laser excitation of a scanning tunneling microscope (STM) junction at visible wavelengths. As a hallmark of the plasmon-assisted resonant tunneling, we ob... [Phys. Rev. Lett. 121, 226802] Published Fri Nov 30, 2018

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Pseudo-Goldstone Gaps and Order-by-Quantum Disorder in Frustrated Magnets (2018)

Jeffrey G. Rau, Paul A. McClarty, and Roderich Moessner

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Jeffrey G. Rau, Paul A. McClarty, and Roderich Moessner In systems with competing interactions, continuous degeneracies can appear which are accidental, in that they are not related to any symmetry of the Hamiltonian. Accordingly, the pseudo-Goldstone modes associated with these degeneracies are also unprotected. Indeed, through a process known as “order... [Phys. Rev. Lett. 121, 237201] Published Mon Dec 03, 2018

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Extended quantum Maxwell demon acting over macroscopic distances (2018)

A. V. Lebedev, G. B. Lesovik, V. M. Vinokur, and G. Blatter

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-05

Beschreibung: Author(s): A. V. Lebedev, G. B. Lesovik, V. M. Vinokur, and G. Blatter A quantum Maxwell demon is a device that can lower the entropy of a quantum system by providing it with purity. The functionality of such a quantum demon is rooted in a quantum-mechanical SWAP operation exchanging mixed and pure states. We describe the setup and performance of a quantum Maxwell demo... [Phys. Rev. B 98, 214502] Published Tue Dec 04, 2018

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Suppression of superfluid stiffness near a Lifshitz-point instability to finite-momentum superconductivity (2018)

Jonatan Wårdh, Brian M. Andersen, and Mats Granath

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-05

Beschreibung: Author(s): Jonatan Wårdh, Brian M. Andersen, and Mats Granath We derive the effective Ginzburg-Landau (GL) theory for finite-momentum [Fulde-Ferrell-Larkin-Ovchinnikov/pair-density wave (FFLO/PDW)] superconductivity without spin population imbalance from a model with local attraction and repulsive pair hopping. We find that the GL free energy must include up t... [Phys. Rev. B 98, 224501] Published Tue Dec 04, 2018

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Chiral supercurrent through a quantum Hall weak link (2018)

Yahya Alavirad, Junhyun Lee, Ze-Xun Lin, and Jay D. Sau

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-07

Beschreibung: Author(s): Yahya Alavirad, Junhyun Lee, Ze-Xun Lin, and Jay D. Sau We use an effective model to calculate properties of the supercurrent carried by chiral edge states of a quantum Hall weak link. This “chiral” supercurrent is qualitatively distinct from the usual Josephson supercurrent in that it cannot be mediated by a single edge alone, i.e., both right- and left... [Phys. Rev. B 98, 214504] Published Thu Dec 06, 2018

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Mean-field theory for superconductivity in twisted bilayer graphene (2018)

Teemu J. Peltonen, Risto Ojajärvi, and Tero T. Heikkilä

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): Teemu J. Peltonen, Risto Ojajärvi, and Tero T. Heikkilä Recent experiments show how a bilayer graphene twisted around a certain magic angle becomes superconducting as it is doped into a region with approximate flat bands. We investigate the mean-field s -wave superconducting state in such a system and show how the state evolves as the twist angle is tuned... [Phys. Rev. B 98, 220504(R)] Published Mon Dec 10, 2018

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Anomalous normal-state resistivity in superconducting $\mathrm{L}{\mathrm{a}}_{2−x}\mathrm{C}{\mathrm{e}}_{x}\mathrm{Cu}{\mathrm{O}}_{4}$: Fermi liquid or strange metal? (2018)

Tarapada Sarkar, Richard L. Greene, and S. Das Sarma

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): Tarapada Sarkar, Richard L. Greene, and S. Das Sarma We present experimental results for the in-plane resistivity of the electron-doped cuprate superconductor L a 2 − x C e x Cu O 4 above its transition temperature T c as a function of Ce doping x and temperature. For the doping x between 0.11 and 0.17, where T c varies from 30 K ( x = 0.11 ) to 5 K ( x = 0.17 ), we find... [Phys. Rev. B 98, 224503] Published Mon Dec 10, 2018

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Imaging the Local Charge Environment of Nitrogen-Vacancy Centers in Diamond (2018)

T. Mittiga, S. Hsieh, C. Zu, B. Kobrin, F. Machado, P. Bhattacharyya, N. Z. Rui, A. Jarmola, S. Choi, D. Budker, and N. Y. Yao

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-13

Beschreibung: Author(s): T. Mittiga, S. Hsieh, C. Zu, B. Kobrin, F. Machado, P. Bhattacharyya, N. Z. Rui, A. Jarmola, S. Choi, D. Budker, and N. Y. Yao Nitrogen-vacancy centers in diamond are found to be more affected by local charge than expected, which has implications for the use of the defects as quantum sensors. [Phys. Rev. Lett. 121, 246402] Published Wed Dec 12, 2018

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Pressure-induced multiple phase transformations of the ${\mathrm{BaBi}}_{3}$ superconductor (2018)

Li Xiang, Raquel A. Ribeiro, Udhara S. Kaluarachchi, Elena Gati, Manh Cuong Nguyen, Cai-Zhuang Wang, Kai-Ming Ho, Sergey L. Bud'ko, and Paul C. Canfield

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-14

Beschreibung: Author(s): Li Xiang, Raquel A. Ribeiro, Udhara S. Kaluarachchi, Elena Gati, Manh Cuong Nguyen, Cai-Zhuang Wang, Kai-Ming Ho, Sergey L. Bud'ko, and Paul C. Canfield Measurements of temperature-dependent resistance and magnetization under hydrostatic pressures up to 2.13 GPa are reported for single-crystalline, superconducting BaBi 3 . A temperature-pressure phase diagram is determined and the results suggest three different superconducting phases α , β , and γ in t... [Phys. Rev. B 98, 214509] Published Thu Dec 13, 2018

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$z=2$ Quantum Critical Dynamics in a Spin Ladder (2018)

D. Blosser, V. K. Bhartiya, D. J. Voneshen, and A. Zheludev

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-14

Beschreibung: Author(s): D. Blosser, V. K. Bhartiya, D. J. Voneshen, and A. Zheludev By means of inelastic neutron scattering we investigate finite temperature dynamics in the quantum spin ladder compound ( C 5 H 12 N ) 2 CuBr 4 (BPCB) near the magnetic field induced quantum critical point with dynamical exponent z = 2 . We observe universal finite-temperature scaling of the transverse local dy... [Phys. Rev. Lett. 121, 247201] Published Thu Dec 13, 2018

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Realization of continuous electron doping in bulk iron selenides and identification of a new superconducting zone (2018)

R. J. Sun, Y. Quan, S. F. Jin, Q. Z. Huang, H. Wu, L. Zhao, L. Gu, Z. P. Yin, and X. L. Chen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-13

Beschreibung: Author(s): R. J. Sun, Y. Quan, S. F. Jin, Q. Z. Huang, H. Wu, L. Zhao, L. Gu, Z. P. Yin, and X. L. Chen Iron selenide superconductors exhibit unique characteristics distinct from iron pnictides, especially in the electron-doped region. Here, the authors report the synthesis of a new family of Li x (C 3 N 2 H 10 ) 0 . 37 FeSe materials, which features a continuous superconducting dome harboring a Lifshitz transition within the wide range of 0.06 ≤ x ≤ 0.68. Under electron doping, the anion height of FeSe layers deviates linearly away from the optimized values of pnictides. This feature leads to a new superconducting zone with unique electronic structures and strong orbital-selective electronic correlation. [Phys. Rev. B 98, 214508] Published Wed Dec 12, 2018

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Interactions and Magnetotransport through Spin-Valley Coupled Landau Levels in Monolayer ${\mathrm{MoS}}_{2}$ (2018)

Riccardo Pisoni, Andor Kormányos, Matthew Brooks, Zijin Lei, Patrick Back, Marius Eich, Hiske Overweg, Yongjin Lee, Peter Rickhaus, Kenji Watanabe, Takashi Taniguchi, Atac Imamoglu, Guido Burkard, Thomas Ihn, and Klaus Ensslin

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-14

Beschreibung: Author(s): Riccardo Pisoni, Andor Kormányos, Matthew Brooks, Zijin Lei, Patrick Back, Marius Eich, Hiske Overweg, Yongjin Lee, Peter Rickhaus, Kenji Watanabe, Takashi Taniguchi, Atac Imamoglu, Guido Burkard, Thomas Ihn, and Klaus Ensslin The strong spin-orbit coupling and the broken inversion symmetry in monolayer transition metal dichalcogenides results in spin-valley coupled band structures. Such a band structure leads to novel applications in the fields of electronics and optoelectronics. Density functional theory calculations as... [Phys. Rev. Lett. 121, 247701] Published Thu Dec 13, 2018

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Strongly Enhanced Berry Dipole at Topological Phase Transitions in BiTeI (2018)

Jorge I. Facio, Dmitri Efremov, Klaus Koepernik, Jhih-Shih You, Inti Sodemann, and Jeroen van den Brink

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-15

Beschreibung: Author(s): Jorge I. Facio, Dmitri Efremov, Klaus Koepernik, Jhih-Shih You, Inti Sodemann, and Jeroen van den Brink Transitions between topologically distinct electronic states have been predicted in different classes of materials and observed in some. A major goal is the identification of measurable properties that directly expose the topological nature of such transitions. Here, we focus on the giant Rashba mat... [Phys. Rev. Lett. 121, 246403] Published Fri Dec 14, 2018

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First-principles study of superconductivity in the two- and three-dimensional forms of ${\mathrm{PbTiSe}}_{2}$: Suppressed charge density wave in $1T\text{−}{\mathrm{TiSe}}_{2}$ (2018)

Bao-Tian Wang, Peng-Fei Liu, Jing-Jing Zheng, Wen Yin, and Fangwei Wang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Bao-Tian Wang, Peng-Fei Liu, Jing-Jing Zheng, Wen Yin, and Fangwei Wang Layered 1 T − TiSe 2 has attracted much interest for the competition of charge density wave (CDW) and superconductivity in its bulk and even monolayer forms. Here we perform first-principles calculations of the electronic structure, phonon dispersion, and electron-phonon coupling of the Pb-intercalated ... [Phys. Rev. B 98, 014514] Published Tue Jul 24, 2018

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Effect of electrons scattered by optical phonons on superconductivity in $M{\mathrm{H}}_{3}$ ($M=\mathrm{S}$, Ti, V, Se) (2018)

Quan Zhuang, Xilian Jin, Tian Cui, Die Zhang, Ying Li, Xin Li, Kuo Bao, and Bingbing Liu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Quan Zhuang, Xilian Jin, Tian Cui, Die Zhang, Ying Li, Xin Li, Kuo Bao, and Bingbing Liu For exploring the superconductivity mechanisms and seeking potential high-temperature superconductors in hydrogen-rich compounds, we perform a systematical investigation of the phase diagram, crystal structures, electronic properties, and electron-phonon coupling (EPC) of titanium hydrides under hig... [Phys. Rev. B 98, 024514] Published Tue Jul 24, 2018

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Shedding light on topological superconductors (2018)

K. H. A. Villegas, V. M. Kovalev, F. V. Kusmartsev, and I. G. Savenko

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): K. H. A. Villegas, V. M. Kovalev, F. V. Kusmartsev, and I. G. Savenko We propose an effective optical approach to monitor superconductors in a two-layer superconductor-normal metal structure. Effectively, such a hybrid system represents a resonator, where electrons are strongly coupled with light. We show that the interaction of light with the superconductor is strong... [Phys. Rev. B 98, 064502] Published Tue Aug 07, 2018

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Nematicity and Charge Order in Superoxygenated ${\mathrm{La}}_{2−x}{\mathrm{Sr}}_{x}{\mathrm{CuO}}_{4+y}$ (2018)

Zhiwei Zhang, R. Sutarto, F. He, F. C. Chou, L. Udby, S. L. Holm, Z. H. Zhu, W. A. Hines, J. I. Budnick, and B. O. Wells

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-09

Beschreibung: Author(s): Zhiwei Zhang, R. Sutarto, F. He, F. C. Chou, L. Udby, S. L. Holm, Z. H. Zhu, W. A. Hines, J. I. Budnick, and B. O. Wells In this Letter, we report a resonant x-ray scattering measurement of stripelike charge order in the 1/8th doped component of electronically phase-separated, orthorhombic La 2 CuO 4 + y . This observation is coupled to the absence of any resonant (001) peak, which at different resonant energies has been id... [Phys. Rev. Lett. 121, 067602] Published Wed Aug 08, 2018

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Electrical Reservoirs for Bilayer Excitons (2018)

Ming Xie and A. H. Mac; Donald

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-09

Beschreibung: Author(s): Ming Xie and A. H. MacDonald The ground state of two-dimensional (2D) electron systems with equal low densities of electrons and holes in nearby layers is an exciton fluid. We show that a reservoir for excitons can be established by contacting the two layers separately and maintaining the chemical potential difference at a valu... [Phys. Rev. Lett. 121, 067702] Published Wed Aug 08, 2018

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Correlation-Driven Dimerization and Topological Gap Opening in Isotropically Strained Graphene (2018)

Sandro Sorella, Kazuhiro Seki, Oleg O. Brovko, Tomonori Shirakawa, Shohei Miyakoshi, Seiji Yunoki, and Erio Tosatti

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-09

Beschreibung: Author(s): Sandro Sorella, Kazuhiro Seki, Oleg O. Brovko, Tomonori Shirakawa, Shohei Miyakoshi, Seiji Yunoki, and Erio Tosatti The phase diagram of isotropically expanded graphene cannot be correctly predicted by ignoring either electron correlations, or mobile carbons, or the effect of applied stress, as was done so far. We calculate the ground state enthalpy (not just energy) of strained graphene by an accurate off-lattic... [Phys. Rev. Lett. 121, 066402] Published Wed Aug 08, 2018

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Spin Waves in Detwinned ${\mathrm{BaFe}}_{2}{\mathrm{As}}_{2}$ (2018)

Xingye Lu, Daniel D. Scherer, David W. Tam, Wenliang Zhang, Rui Zhang, Huiqian Luo, Leland W. Harriger, H. C. Walker, D. T. Adroja, Brian M. Andersen, and Pengcheng Dai

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-09

Beschreibung: Author(s): Xingye Lu, Daniel D. Scherer, David W. Tam, Wenliang Zhang, Rui Zhang, Huiqian Luo, Leland W. Harriger, H. C. Walker, D. T. Adroja, Brian M. Andersen, and Pengcheng Dai Understanding magnetic interactions in the parent compounds of high-temperature superconductors forms the basis for determining their role for the mechanism of superconductivity. For parent compounds of iron pnictide superconductors such as A Fe 2 As 2 ( A = Ba , Ca, Sr), although spin excitations have been... [Phys. Rev. Lett. 121, 067002] Published Wed Aug 08, 2018

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Disorder-sensitive nodelike small gap in FeSe (2018)

Yue Sun, Shunichiro Kittaka, Shota Nakamura, Toshiro Sakakibara, Peng Zhang, Shik Shin, Koki Irie, Takuya Nomoto, Kazushige Machida, Jingting Chen, and Tsuyoshi Tamegai

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): Yue Sun, Shunichiro Kittaka, Shota Nakamura, Toshiro Sakakibara, Peng Zhang, Shik Shin, Koki Irie, Takuya Nomoto, Kazushige Machida, Jingting Chen, and Tsuyoshi Tamegai We investigate the band structure, nematic state, and superconducting gap structure of two selected FeSe single crystals containing different amounts of disorder. Transport and angle-resolved photoemission spectroscopy measurements show that the small amount of disorder has little effect on the band... [Phys. Rev. B 98, 064505] Published Mon Aug 13, 2018

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Nonexponential long-range interaction of magnetic impurities in spin-orbit coupled superconductors (2018)

A. G. Mal'shukov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): A. G. Mal'shukov The Ruderman-Kittel-Kasuya-Yosida interaction of magnetic impurities in a superconductor exponentially decreases when the distance r between them is larger than the superconductor's coherence length because this interaction is mediated by quasiparticles, which have a gap in their energy spectra. At ... [Phys. Rev. B 98, 054504] Published Mon Aug 13, 2018

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Quantum phase transitions in proximitized Josephson junctions (2018)

Chien-Te Wu, F. Setiawan, Brandon M. Anderson, Wei-Han Hsiao, and K. Levin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): Chien-Te Wu, F. Setiawan, Brandon M. Anderson, Wei-Han Hsiao, and K. Levin We study fermion-parity-changing quantum phase transitions (QPTs) in platform Josephson junctions. These QPTs, associated with zero-energy bound states, are rather widely observed experimentally. They emerge from numerical calculations frequently without detailed microscopic insight. Importantly, th... [Phys. Rev. B 98, 064504] Published Mon Aug 13, 2018

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Short-range antiferromagnetic correlations in the superconducting state of filled skutterudite alloys ${\mathrm{Pr}}_{1−x}{\mathrm{Eu}}_{x}{\mathrm{Pt}}_{4}{\mathrm{Ge}}_{12}$ (2018)

R. B. Adhikari, D. L. Kunwar, I. Jeon, M. B. Maple, M. Dzero, and C. C. Almasan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): R. B. Adhikari, D. L. Kunwar, I. Jeon, M. B. Maple, M. Dzero, and C. C. Almasan Motivated by current research efforts toward exploring the interplay between magnetism and superconductivity in multiband electronic systems, we have investigated the effects of Eu substitution through thermodynamic measurements on the superconducting filled skutterudite alloys Pr 1 − x Eu x Pt 4 Ge 12 . An i... [Phys. Rev. B 98, 064506] Published Mon Aug 13, 2018

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Unusual suppression of a spin resonance mode by magnetic field in underdoped ${\mathrm{NaFe}}_{1−x}{\mathrm{Co}}_{x}\mathrm{As}$: Evidence for orbital-selective pairing (2018)

Yu Song, Guotai Tan, Chenglin Zhang, Rasmus Toft-Petersen, Rong Yu, and Pengcheng Dai

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): Yu Song, Guotai Tan, Chenglin Zhang, Rasmus Toft-Petersen, Rong Yu, and Pengcheng Dai We use inelastic neutron scattering to study the fate of the two spin resonance modes in underdoped superconducting NaFe 1 − x Co x As ( x = 0.0175 ) under applied magnetic fields. While an in-plane magnetic field of B = 12 T only modestly suppresses superconductivity and enhances static antiferromagnetic order,... [Phys. Rev. B 98, 064507] Published Mon Aug 13, 2018

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Optical conductivity of overdoped cuprate superconductors: Application to ${\mathrm{La}}_{2−x}{\mathrm{Sr}}_{x}{\mathrm{CuO}}_{4}$ (2018)

N. R. Lee-Hone, V. Mishra, D. M. Broun, and P. J. Hirschfeld

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-15

Beschreibung: Author(s): N. R. Lee-Hone, V. Mishra, D. M. Broun, and P. J. Hirschfeld We argue that recent measurements on both the superfluid density and the optical conductivity of high-quality La 2 − x Sr x CuO 4 (LSCO) films can be understood almost entirely within the theory of disordered BCS d -wave superconductors. The large scattering rates deduced from experiments are shown to arise... [Phys. Rev. B 98, 054506] Published Tue Aug 14, 2018

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Dimensional crossover in the quasi-one-dimensional superconductor ${\mathrm{Tl}}_{2}{\mathrm{Mo}}_{6}{\mathrm{Se}}_{6}$ (2018)

S. Mitra, A. P. Petrović, D. Salloum, P. Gougeon, M. Potel, Jian-Xin Zhu, C. Panagopoulos, and Elbert E. M. Chia

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-15

Beschreibung: Author(s): S. Mitra, A. P. Petrović, D. Salloum, P. Gougeon, M. Potel, Jian-Xin Zhu, C. Panagopoulos, and Elbert E. M. Chia We present magnetic penetration depth and electrical transport data in single crystals of quasi-one-dimensional (q1D) Tl 2 Mo 6 Se 6 , which reveal a 1 D → 3 D superconducting dimensional crossover. The c -axis penetration depth shows the onset of superconducting fluctuations below T 1 D o n s = 6.7 K, whereas signat... [Phys. Rev. B 98, 054507] Published Tue Aug 14, 2018

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Central Charge of Periodically Driven Critical Kitaev Chains (2018)

Daniel Yates, Yonah Lemonik, and Aditi Mitra

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-15

Beschreibung: Author(s): Daniel Yates, Yonah Lemonik, and Aditi Mitra Periodically driven Kitaev chains show a rich phase diagram as the amplitude and frequency of the drive is varied, with topological phase transitions separating regions with different number of Majorana zero and π modes. We explore whether the critical point separating different phases of the period... [Phys. Rev. Lett. 121, 076802] Published Tue Aug 14, 2018

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Spin Lifetime and Charge Noise in Hot Silicon Quantum Dot Qubits (2018)

L. Petit, J. M. Boter, H. G. J. Eenink, G. Droulers, M. L. V. Tagliaferri, R. Li, D. P. Franke, K. J. Singh, J. S. Clarke, R. N. Schouten, V. V. Dobrovitski, L. M. K. Vandersypen, and M. Veldhorst

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-15

Beschreibung: Author(s): L. Petit, J. M. Boter, H. G. J. Eenink, G. Droulers, M. L. V. Tagliaferri, R. Li, D. P. Franke, K. J. Singh, J. S. Clarke, R. N. Schouten, V. V. Dobrovitski, L. M. K. Vandersypen, and M. Veldhorst We investigate the magnetic field and temperature dependence of the single-electron spin lifetime in silicon quantum dots and find a lifetime of 2.8 ms at a temperature of 1.1 K. We develop a model based on spin-valley mixing and find that Johnson noise and two-phonon processes limit relaxation at l... [Phys. Rev. Lett. 121, 076801] Published Tue Aug 14, 2018

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Linear temperature dependence of the upper critical field across the dome of the ${\mathrm{LaAlO}}_{3}−{\mathrm{SrTiO}}_{3}$ interface superconductor (2018)

L. Kuerten, E. Fillis-Tsirakis, C. Richter, J. Mannhart, and H. Boschker

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): L. Kuerten, E. Fillis-Tsirakis, C. Richter, J. Mannhart, and H. Boschker Numerous two-dimensional superconductors exhibit a characteristic dome-shaped dependence of the critical temperature T c on the carrier density. The reduction of the critical temperature with increasing charge carrier density on the overdoped side of this dome is frequently related to scattering aris... [Phys. Rev. B 98, 054509] Published Wed Aug 15, 2018

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Geometric Josephson effects in chiral topological nanowires (2018)

Christian Spånslätt

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): Christian Spånslätt One of the salient signatures of Majorana zero modes and topological superconductivity is a 4 π -periodic Josephson effect due to the combination of fermion parity conservation and the presence of a topologically protected odd number of zero-energy crossings in the Andreev spectrum. In this paper, we ... [Phys. Rev. B 98, 054508] Published Wed Aug 15, 2018

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Temperature Controlled Fulde-Ferrell-Larkin-Ovchinnikov Instability in Superconductor-Ferromagnet Hybrids (2018)

S. V. Mironov, D. Yu. Vodolazov, Y. Yerin, A. V. Samokhvalov, A. S. Mel’nikov, and A. Buzdin

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): S. V. Mironov, D. Yu. Vodolazov, Y. Yerin, A. V. Samokhvalov, A. S. Mel’nikov, and A. Buzdin We show that a wide class of layered superconductor-ferromagnet ( S / F ) hybrids demonstrates the emergence of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase well below the superconducting transition temperature. By decreasing the temperature, one can switch the system from uniform to the FFLO state... [Phys. Rev. Lett. 121, 077002] Published Wed Aug 15, 2018

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From Kinetic Instability to Bose-Einstein Condensation and Magnon Supercurrents (2018)

Alexander J. E. Kreil, Dmytro A. Bozhko, Halyna Yu. Musiienko-Shmarova, Vitaliy I. Vasyuchka, Victor S. L’vov, Anna Pomyalov, Burkard Hillebrands, and Alexander A. Serga

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): Alexander J. E. Kreil, Dmytro A. Bozhko, Halyna Yu. Musiienko-Shmarova, Vitaliy I. Vasyuchka, Victor S. L’vov, Anna Pomyalov, Burkard Hillebrands, and Alexander A. Serga Evolution of an overpopulated gas of magnons to a Bose-Einstein condensate and excitation of a magnon supercurrent, propelled by a phase gradient in the condensate wave function, can be observed at room temperature by means of the Brillouin light scattering spectroscopy in an yttrium iron garnet mat... [Phys. Rev. Lett. 121, 077203] Published Wed Aug 15, 2018

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Influence of Spin-Orbit Coupling in Iron-Based Superconductors (2018)

R. P. Day, G. Levy, M. Michiardi, B. Zwartsenberg, M. Zonno, F. Ji, E. Razzoli, F. Boschini, S. Chi, R. Liang, P. K. Das, I. Vobornik, J. Fujii, W. N. Hardy, D. A. Bonn, I. S. Elfimov, and A. Damascelli

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): R. P. Day, G. Levy, M. Michiardi, B. Zwartsenberg, M. Zonno, F. Ji, E. Razzoli, F. Boschini, S. Chi, R. Liang, P. K. Das, I. Vobornik, J. Fujii, W. N. Hardy, D. A. Bonn, I. S. Elfimov, and A. Damascelli We report on the influence of spin-orbit coupling (SOC) in Fe-based superconductors via application of circularly polarized spin and angle-resolved photoemission spectroscopy. We combine this technique in representative members of both the Fe-pnictides (LiFeAs) and Fe-chalcogenides (FeSe) with tight... [Phys. Rev. Lett. 121, 076401] Published Fri Aug 17, 2018

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Three-Dimensional Fermi Surface of Overdoped La-Based Cuprates (2018)

M. Horio et al.

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): M. Horio et al. We present a soft x-ray angle-resolved photoemission spectroscopy study of overdoped high-temperature superconductors. In-plane and out-of-plane components of the Fermi surface are mapped by varying the photoemission angle and the incident photon energy. No k z dispersion is observed along the nodal ... [Phys. Rev. Lett. 121, 077004] Published Fri Aug 17, 2018

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Single-Site Non-Fermi-Liquid Behaviors in a Diluted $4{f}^{2}$ System ${\mathrm{Y}}_{1−x}{\mathrm{Pr}}_{x}{\mathrm{Ir}}_{2}{\mathrm{Zn}}_{20}$ (2018)

Y. Yamane, T. Onimaru, K. Wakiya, K. T. Matsumoto, K. Umeo, and T. Takabatake

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): Y. Yamane, T. Onimaru, K. Wakiya, K. T. Matsumoto, K. Umeo, and T. Takabatake Electrical resistivity ρ ( T ) and specific heat C ( T ) measurements have been made on the diluted 4 f 2 system Y ( Pr ) Ir 2 Zn 20 . Both data of ρ and magnetic specific heat C m per Pr ion are well scaled as a function of T / T 0 , where T 0 is a characteristic temperature of non-Fermi-liquid (NFL) behaviors. Furtherm... [Phys. Rev. Lett. 121, 077206] Published Fri Aug 17, 2018

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Magnetic Exchange Fields and Domain Wall Superconductivity at an All-Oxide Superconductor-Ferromagnet Insulator Interface (2018)

S. Komori, A. Di Bernardo, A. I. Buzdin, M. G. Blamire, and J. W. A. Robinson

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): S. Komori, A. Di Bernardo, A. I. Buzdin, M. G. Blamire, and J. W. A. Robinson At a superconductor-ferromagnet ( S / F ) interface, the F layer can introduce a magnetic exchange field within the S layer, which acts to locally spin split the superconducting density of states. The effect of magnetic exchange fields on superconductivity has been thoroughly explored at S -ferromagnet i... [Phys. Rev. Lett. 121, 077003] Published Fri Aug 17, 2018

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Competition of electron-phonon mediated superconductivity and Stoner magnetism on a flat band (2018)

Risto Ojajärvi, Timo Hyart, Mihail A. Silaev, and Tero T. Heikkilä

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-23

Beschreibung: Author(s): Risto Ojajärvi, Timo Hyart, Mihail A. Silaev, and Tero T. Heikkilä The effective attractive interaction between electrons, mediated by electron-phonon coupling, is a well-established mechanism of conventional superconductivity. In metals exhibiting a Fermi surface, the critical temperature of superconductivity is exponentially smaller than the characteristic phonon... [Phys. Rev. B 98, 054515] Published Wed Aug 22, 2018

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Fractionalized Metal in a Falicov-Kimball Model (2018)

Martin Hohenadler and Fakher F. Assaad

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-22

Beschreibung: Author(s): Martin Hohenadler and Fakher F. Assaad Quantum Monte Carlo simulations reveal an exotic metallic phase with a single-particle gap but gapless spin and charge excitations and a nonsaturating resistivity in a two-dimensional SU(2) Falicov-Kimball model. An exact duality between this model and an unconstrained slave-spin theory leads to a c... [Phys. Rev. Lett. 121, 086601] Published Tue Aug 21, 2018

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Inter-Landau-level Andreev Reflection at the Dirac Point in a Graphene Quantum Hall State Coupled to a ${\mathrm{NbSe}}_{2}$ Superconductor (2018)

Manas Ranjan Sahu, Xin Liu, Arup Kumar Paul, Sourin Das, Pratap Raychaudhuri, J. K. Jain, and Anindya Das

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-25

Beschreibung: Author(s): Manas Ranjan Sahu, Xin Liu, Arup Kumar Paul, Sourin Das, Pratap Raychaudhuri, J. K. Jain, and Anindya Das Superconductivity and the quantum Hall effect are distinct states of matter occurring in apparently incompatible physical conditions. Recent theoretical developments suggest that the coupling of the quantum Hall effect with a superconductor can provide fertile ground for realizing exotic topological... [Phys. Rev. Lett. 121, 086809] Published Fri Aug 24, 2018

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Fast Detection of a Weak Signal by a Stochastic Resonance Induced by a Coherence Resonance in an Excitable $\mathrm{GaAs}/{\mathrm{Al}}_{0.45}{\mathrm{Ga}}_{0.55}\mathrm{As}$ Superlattice (2018)

Zhengzheng Shao, Zhizhen Yin, Helun Song, Wei Liu, Xiujian Li, Jubo Zhu, Klaus Biermann, Luis L. Bonilla, Holger T. Grahn, and Yaohui Zhang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-25

Beschreibung: Author(s): Zhengzheng Shao, Zhizhen Yin, Helun Song, Wei Liu, Xiujian Li, Jubo Zhu, Klaus Biermann, Luis L. Bonilla, Holger T. Grahn, and Yaohui Zhang The effect of a coherence resonance is observed experimentally in a GaAs / Al 0.45 Ga 0.55 As superlattice under dc bias at room temperature, which is driven by noise. For an applied voltage, for which no current self-oscillations are observed, regular current self-oscillations with a frequency of about 8... [Phys. Rev. Lett. 121, 086806] Published Fri Aug 24, 2018

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Symmetry-Protected Topological Metals (2018)

Xuzhe Ying and Alex Kamenev

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-25

Beschreibung: Author(s): Xuzhe Ying and Alex Kamenev We show that sharply defined topological quantum phase transitions are not limited to states of matter with gapped electronic spectra. Such transitions may also occur between two gapless metallic states both with extended Fermi surfaces. The transition is characterized by a discontinuous, but not qu... [Phys. Rev. Lett. 121, 086810] Published Fri Aug 24, 2018

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Measurement of the Entanglement Spectrum of a Symmetry-Protected Topological State Using the IBM Quantum Computer (2018)

Kenny Choo, Curt W. von Keyserlingk, Nicolas Regnault, and Titus Neupert

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-25

Beschreibung: Author(s): Kenny Choo, Curt W. von Keyserlingk, Nicolas Regnault, and Titus Neupert Entanglement properties are routinely used to characterize phases of quantum matter in theoretical computations. For example, the spectrum of the reduced density matrix, or so-called “entanglement spectrum”, has become a widely used diagnostic for universal topological properties of quantum phases. ... [Phys. Rev. Lett. 121, 086808] Published Fri Aug 24, 2018

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Coherence Resonance and Stochastic Resonance in an Excitable Semiconductor Superlattice (2018)

Emanuel Mompo, Miguel Ruiz-Garcia, Manuel Carretero, Holger T. Grahn, Yaohui Zhang, and Luis L. Bonilla

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-25

Beschreibung: Author(s): Emanuel Mompo, Miguel Ruiz-Garcia, Manuel Carretero, Holger T. Grahn, Yaohui Zhang, and Luis L. Bonilla Collective electron transport causes a weakly coupled semiconductor superlattice under dc voltage bias to be an excitable system with 2 N + 2 degrees of freedom: electron densities and fields at N superlattice periods plus the total current and the field at the injector. External noise of sufficient am... [Phys. Rev. Lett. 121, 086805] Published Fri Aug 24, 2018

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Monopole-Induced Emergent Electric Fields in Ferromagnetic Nanowires (2018)

Michalis Charilaou, Hans-Benjamin Braun, and Jörg F. Löffler

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-29

Beschreibung: Author(s): Michalis Charilaou, Hans-Benjamin Braun, and Jörg F. Löffler We predict that complete magnetization reversal in simple metallic ferromagnetic nanoparticles is directly linked to the pair creation of topological point defects in the form of hedgehog-antihedgehog pairs. These dynamical point defects move at exceptionally high speeds in excess of 1500 m / s , fast... [Phys. Rev. Lett. 121, 097202] Published Tue Aug 28, 2018

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Thermally Driven Out-of-Equilibrium Two-Impurity Kondo System (2018)

Miguel A. Sierra, Rosa López, and Jong Soo Lim

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-30

Beschreibung: Author(s): Miguel A. Sierra, Rosa López, and Jong Soo Lim The archetypal two-impurity Kondo problem in a serially coupled double quantum dot is investigated in the presence of a thermal bias θ . The slave-boson formulation is employed to obtain the nonlinear thermal and thermoelectrical responses. When the Kondo correlations prevail over the antiferromagnet... [Phys. Rev. Lett. 121, 096801] Published Wed Aug 29, 2018

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Sensitivity of ${T}_{\mathrm{c}}$ to pressure and magnetic field in the cuprate superconductor ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{y}$: Evidence of charge-order suppression by pressure (2018)

O. Cyr-Choinière, D. Le; Boeuf, S. Badoux, S. Dufour-Beauséjour, D. A. Bonn, W. N. Hardy, R. Liang, D. Graf, N. Doiron-Leyraud, and Louis Taillefer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-31

Beschreibung: Author(s): O. Cyr-Choinière, D. LeBoeuf, S. Badoux, S. Dufour-Beauséjour, D. A. Bonn, W. N. Hardy, R. Liang, D. Graf, N. Doiron-Leyraud, and Louis Taillefer Cuprate superconductors have a universal tendency to form charge density-wave (CDW) order which competes with superconductivity and is strongest at a doping p ≃ 0.12 . Here we show that in the archetypal cuprate YBa 2 Cu 3 O y (YBCO) pressure suppresses charge order but does not affect the pseudogap phase. ... [Phys. Rev. B 98, 064513] Published Thu Aug 30, 2018

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Spontaneous edge current in higher chirality superconductors (2018)

Xin Wang, Zhiqiang Wang, and Catherine Kallin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): Xin Wang, Zhiqiang Wang, and Catherine Kallin The effects of finite temperature, Meissner screening, and surface roughness on the spontaneous edge current for higher chirality quasi-two-dimensional superconductors are studied in the continuum limit using the quasiclassical Eilenberger equations. We find that the total spontaneous current is non... [Phys. Rev. B 98, 094501] Published Tue Sep 04, 2018

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Exactly solvable model for two-dimensional topological superconductors (2018)

Zitao Wang, Shang-Qiang Ning, and Xie Chen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): Zitao Wang, Shang-Qiang Ning, and Xie Chen In this paper, we present an exactly solvable model for two-dimensional topological superconductors with helical Majorana edge modes protected by time-reversal symmetry. Our construction is based on the idea of decorated domain walls and makes use of the Kasteleyn orientation on a two-dimensional la... [Phys. Rev. B 98, 094502] Published Tue Sep 04, 2018

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Hidden charge-conjugation, parity, and time-reversal symmetries and massive Goldstone (Higgs) modes in superconductors (2018)

Shunji Tsuchiya, Daisuke Yamamoto, Ryosuke Yoshii, and Muneto Nitta

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): Shunji Tsuchiya, Daisuke Yamamoto, Ryosuke Yoshii, and Muneto Nitta A massive Goldstone (MG) mode, often referred to as a Higgs amplitude mode, is a collective excitation that arises in a system involving spontaneous breaking of a continuous symmetry, along with a gapless Nambu-Goldstone mode. It has been known in the previous studies that a pure amplitude MG mode e... [Phys. Rev. B 98, 094503] Published Tue Sep 04, 2018

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High-pressure phase diagram of ${\mathrm{NdFeAsO}}_{0.9}{\mathrm{F}}_{0.1}$: Disappearance of superconductivity on the verge of ferromagnetism from Nd moments (2018)

M. Abdel-Hafiez, M. Mito, K. Shibayama, S. Takagi, M. Ishizuka, A. N. Vasiliev, C. Krellner, and H. K. Mao

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): M. Abdel-Hafiez, M. Mito, K. Shibayama, S. Takagi, M. Ishizuka, A. N. Vasiliev, C. Krellner, and H. K. Mao We investigated transport and magnetic properties of single crystal NdFeAsO 0.9 F 0.1 under hydrostatic pressures up to 50 GPa. The ambient pressure superconductivity at T c ∼ 45.4 K was fully suppressed at P c ∼ 21 GPa. Upon a further increase of pressure, ferromagnetism associated with the order of the ra... [Phys. Rev. B 98, 094504] Published Tue Sep 04, 2018

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Solitonic thermal transport in a current-biased long Josephson junction (2018)

Claudio Guarcello, Paolo Solinas, Alessandro Braggio, and Francesco Giazotto

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): Claudio Guarcello, Paolo Solinas, Alessandro Braggio, and Francesco Giazotto We investigate the coherent energy and thermal transport in a temperature-biased long Josephson tunnel junction, when a Josephson vortex, i.e., a soliton, steadily drifts driven by an electric bias current. We demonstrate that thermal transport through the junction can be controlled by the bias curr... [Phys. Rev. B 98, 104501] Published Tue Sep 04, 2018

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Imaging the Zigzag Wigner Crystal in Confinement-Tunable Quantum Wires (2018)

Sheng-Chin Ho, Heng-Jian Chang, Chia-Hua Chang, Shun-Tsung Lo, Graham Creeth, Sanjeev Kumar, Ian Farrer, David Ritchie, Jonathan Griffiths, Geraint Jones, Michael Pepper, and Tse-Ming Chen

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-07

Beschreibung: Author(s): Sheng-Chin Ho, Heng-Jian Chang, Chia-Hua Chang, Shun-Tsung Lo, Graham Creeth, Sanjeev Kumar, Ian Farrer, David Ritchie, Jonathan Griffiths, Geraint Jones, Michael Pepper, and Tse-Ming Chen Using a nanowire with controllable width, researchers have created a type of Wigner crystal in which electrons form an ordered zigzag pattern. [Phys. Rev. Lett. 121, 106801] Published Thu Sep 06, 2018

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Noise-Induced Backscattering in a Quantum Spin Hall Edge (2018)

Jukka I. Väyrynen, Dmitry I. Pikulin, and Jason Alicea

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-07

Beschreibung: Author(s): Jukka I. Väyrynen, Dmitry I. Pikulin, and Jason Alicea The observed imperfect conductance quantization in 2D topological insulators may be due to time-dependent electronic noise from charge puddles. [Phys. Rev. Lett. 121, 106601] Published Thu Sep 06, 2018

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Polarization of the spontaneous magnetic field and magnetic fluctuations in $\mathit{s}+\mathit{is}$ anisotropic multiband superconductors (2018)

V. L. Vadimov and M. A. Silaev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-08

Beschreibung: Author(s): V. L. Vadimov and M. A. Silaev We show that multiband superconductors with broken time-reversal symmetry can produce spontaneous currents and magnetic fields in response to the local variations of pairing constants. Considering the iron pnictide superconductor Ba 1 − x K x Fe 2 As 2 as an example we demonstrate that both the point-group s... [Phys. Rev. B 98, 104504] Published Fri Sep 07, 2018

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Magnetoenhancement of superconductivity in composite $d$-wave superconductors (2018)

Mauro Schiulaz, Christopher L. Baldwin, Chris R. Laumann, and Boris Z. Spivak

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-11

Beschreibung: Author(s): Mauro Schiulaz, Christopher L. Baldwin, Chris R. Laumann, and Boris Z. Spivak We study composite d -wave superconductors consisting of randomly oriented and randomly distributed superconducting droplets embedded in a matrix. In a certain range of parameters the application of a small magnetic field enhances the superconductivity in these materials, while larger fields suppress... [Phys. Rev. B 98, 094508] Published Mon Sep 10, 2018

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Spontaneous Exact Spin-Wave Fractals in Magnonic Crystals (2018)

Daniel Richardson, Boris A. Kalinikos, Lincoln D. Carr, and Mingzhong Wu

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-08

Beschreibung: Author(s): Daniel Richardson, Boris A. Kalinikos, Lincoln D. Carr, and Mingzhong Wu Exact fractals of nonlinear waves that rely on strong dispersion and nonlinearity and arise spontaneously out of magnetic media were observed for the first time. The experiments make use of a microwave to excite a spin wave in a quasi-one-dimensional magnonic crystal. When the power of the input mic... [Phys. Rev. Lett. 121, 107204] Published Fri Sep 07, 2018

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Self-consistent temperature dependence of quasiparticle bands in monolayer FeSe on ${\mathrm{SrTiO}}_{3}$ (2018)

Fabian Schrodi, Alex Aperis, and Peter M. Oppeneer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-12

Beschreibung: Author(s): Fabian Schrodi, Alex Aperis, and Peter M. Oppeneer We study the temperature evolution of the quasiparticle bands of the FeSe monolayer on the SrTiO 3 (STO) substrate from 10 to 300 K by applying the anisotropic, multiband, and full-bandwidth Eliashberg theory. To achieve this, we extend this theory by self-consistently coupling the chemical potential... [Phys. Rev. B 98, 094509] Published Tue Sep 11, 2018

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Gap equation with pairing correlations beyond the mean-field approximation and its equivalence to a Hugenholtz-Pines condition for fermion pairs (2018)

L. Pisani, P. Pieri, and G. Calvanese Strinati

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-12

Beschreibung: Author(s): L. Pisani, P. Pieri, and G. Calvanese Strinati The equation for the gap parameter represents the main equation of the pairing theory of superconductivity. Although it is formally defined through a single-particle property, physically, it reflects the pairing correlations between opposite-spin fermions. Here, we exploit this physical connection a... [Phys. Rev. B 98, 104507] Published Tue Sep 11, 2018

Schlagwort(e): Superfluidity and superconductivity

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Persistence of pinning and creep beyond critical drive within the strong pinning paradigm (2018)

M. Buchacek, R. Willa, V. B. Geshkenbein, and G. Blatter

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-13

Beschreibung: Author(s): M. Buchacek, R. Willa, V. B. Geshkenbein, and G. Blatter Pinning and thermal creep determine the response of numerous systems containing superstructures, e.g., vortices in type II superconductors, domain walls in ferroics, or dislocations in metals. The combination of drive and thermal fluctuations leads to the superstructure's depinning, and its velocity... [Phys. Rev. B 98, 094510] Published Wed Sep 12, 2018

Schlagwort(e): Superfluidity and superconductivity

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Critical behavior of dynamic vortex Mott transition in superconducting arrays at fractional vortex densities (2018)

Enzo Granato

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-13

Beschreibung: Author(s): Enzo Granato We study the differential resistivity transition of two-dimensional superconducting arrays induced by an external driving current, in the presence of thermal fluctuations and a magnetic field corresponding to f flux quantum per plaquette. Recent experiments have identified this transition as a dynam... [Phys. Rev. B 98, 094511] Published Wed Sep 12, 2018

Schlagwort(e): Superfluidity and superconductivity

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Binary Two-Dimensional Honeycomb Lattice with Strong Spin-Orbit Coupling and Electron-Hole Asymmetry (2018)

Jian Gou, Bingyu Xia, Hang Li, Xuguang Wang, Longjuan Kong, Peng Cheng, Hui Li, Weifeng Zhang, Tian Qian, Hong Ding, Yong Xu, Wenhui Duan, Kehui Wu, and Lan Chen

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-18

Beschreibung: Author(s): Jian Gou, Bingyu Xia, Hang Li, Xuguang Wang, Longjuan Kong, Peng Cheng, Hui Li, Weifeng Zhang, Tian Qian, Hong Ding, Yong Xu, Wenhui Duan, Kehui Wu, and Lan Chen A honeycomb structure of Bi and Sn atoms on a Si substrate has a pronounced electron-hole asymmetry, providing a platform to explore applications in nanodevices. [Phys. Rev. Lett. 121, 126801] Published Mon Sep 17, 2018

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Thermal Critical Points and Quantum Critical End Point in the Frustrated Bilayer Heisenberg Antiferromagnet (2018)

J. Stapmanns, P. Corboz, F. Mila, A. Honecker, B. Normand, and S. Wessel

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-18

Beschreibung: Author(s): J. Stapmanns, P. Corboz, F. Mila, A. Honecker, B. Normand, and S. Wessel We consider the finite-temperature phase diagram of the S = 1 / 2 frustrated Heisenberg bilayer. Although this two-dimensional system may show magnetic order only at zero temperature, we demonstrate the presence of a line of finite-temperature critical points related to the line of first-order transitio... [Phys. Rev. Lett. 121, 127201] Published Mon Sep 17, 2018

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Transverse vortex commensurability effect and sign change of the Hall voltage in superconducting ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7−δ}$ thin films with a nanoscale periodic pinning landscape (2018)

G. Zechner, W. Lang, M. Dosmailov, M. A. Bodea, and J. D. Pedarnig

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-19

Beschreibung: Author(s): G. Zechner, W. Lang, M. Dosmailov, M. A. Bodea, and J. D. Pedarnig In superconductors with a periodic pinning potential, the vortices can lock into a commensurate arrangement, where each pin is filled by one vortex. Then, an intriguing duality between conduction electrons in a normal metal and mobile vortices in a superconductor arises. While the mutual repulsion of electrons can evoke a Mott insulator, the interaction between mobile and commensurably trapped vortices can lead to a vortex Mott metal-to-insulator transition with vanishing resistance. The authors report on a hitherto unknown manifestation of such a state, uncovered by measurements of the voltage orthogonal to the injected current. This vortex Hall effect exhibits a sharp peak and a change of sign when the number of vortices exactly matches that of the pins. [Phys. Rev. B 98, 104508] Published Tue Sep 18, 2018

Schlagwort(e): Superfluidity and superconductivity

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Strong and Tunable Spin-Lifetime Anisotropy in Dual-Gated Bilayer Graphene (2018)

Jinsong Xu, Tiancong Zhu, Yunqiu Kelly Luo, Yuan-Ming Lu, and Roland K. Kawakami

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-21

Beschreibung: Author(s): Jinsong Xu, Tiancong Zhu, Yunqiu Kelly Luo, Yuan-Ming Lu, and Roland K. Kawakami Two groups have shown they can create long-lived, polarized spin currents in bilayer graphene. [Phys. Rev. Lett. 121, 127703] Published Thu Sep 20, 2018

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Mirage Andreev Spectra Generated by Mesoscopic Leads in Nanowire Quantum Dots (2018)

Z. Su, A. Zarassi, J.-F. Hsu, P. San-Jose, E. Prada, R. Aguado, E. J. H. Lee, S. Gazibegovic, R. L. M. Op het Veld, D. Car, S. R. Plissard, M. Hocevar, M. Pendharkar, J. S. Lee, J. A. Logan, C. J. Palmstrøm, E. P. A. M. Bakkers, and S. M. Frolov

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-21

Beschreibung: Author(s): Z. Su, A. Zarassi, J.-F. Hsu, P. San-Jose, E. Prada, R. Aguado, E. J. H. Lee, S. Gazibegovic, R. L. M. Op het Veld, D. Car, S. R. Plissard, M. Hocevar, M. Pendharkar, J. S. Lee, J. A. Logan, C. J. Palmstrøm, E. P. A. M. Bakkers, and S. M. Frolov We study transport mediated by Andreev bound states formed in InSb nanowire quantum dots. Two kinds of superconducting source and drain contacts are used: epitaxial Al/InSb devices exhibit a doubling of tunneling resonances, while, in NbTiN / InSb devices, Andreev spectra of the dot appear to be repli... [Phys. Rev. Lett. 121, 127705] Published Thu Sep 20, 2018

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Observation of Spin-Valley-Coupling-Induced Large Spin-Lifetime Anisotropy in Bilayer Graphene (2018)

Johannes Christian Leutenantsmeyer, Josep Ingla-Aynés, Jaroslav Fabian, and Bart J. van Wees

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-21

Beschreibung: Author(s): Johannes Christian Leutenantsmeyer, Josep Ingla-Aynés, Jaroslav Fabian, and Bart J. van Wees Two groups have shown they can create long-lived, polarized spin currents in bilayer graphene. [Phys. Rev. Lett. 121, 127702] Published Thu Sep 20, 2018

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Interaction-Driven Giant Orbital Magnetic Moments in Carbon Nanotubes (2018)

Joshua O. Island, Marvin Ostermann, Lee Aspitarte, Ethan D. Minot, Daniele Varsano, Elisa Molinari, Massimo Rontani, and Gary A. Steele

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-21

Beschreibung: Author(s): Joshua O. Island, Marvin Ostermann, Lee Aspitarte, Ethan D. Minot, Daniele Varsano, Elisa Molinari, Massimo Rontani, and Gary A. Steele Carbon nanotubes continue to be model systems for studies of confinement and interactions. This is particularly true in the case of so-called “ultraclean” carbon nanotube devices offering the study of quantum dots with extremely low disorder. The quality of such systems, however, has increasingly re... [Phys. Rev. Lett. 121, 127704] Published Thu Sep 20, 2018

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Self-energies and quasiparticle scattering interference (2018)

Miguel Antonio Sulangi and Jan Zaanen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-25

Beschreibung: Author(s): Miguel Antonio Sulangi and Jan Zaanen The cuprate high-temperature superconductors are known to host a wide array of effects due to interactions and disorder. In this paper, we look at some of the consequences of these effects which can be visualized by scanning tunneling spectroscopy in order to provide a guide for future experiments. ... [Phys. Rev. B 98, 094518] Published Mon Sep 24, 2018

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