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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

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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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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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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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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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${Z}_{N}$ 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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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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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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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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$z=2$ 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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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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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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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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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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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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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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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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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

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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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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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Tuning Anti-Klein to Klein Tunneling in Bilayer Graphene (2018)

Renjun Du (杜人君), Ming-Hao Liu (劉明豪), Jens Mohrmann, Fan Wu (吴凡), Ralph Krupke, Hilbert von Löhneysen, Klaus Richter, and Romain Danneau

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-22

Beschreibung: Author(s): Renjun Du (杜人君), Ming-Hao Liu (劉明豪), Jens Mohrmann, Fan Wu (吴凡), Ralph Krupke, Hilbert von Löhneysen, Klaus Richter, and Romain Danneau We show that in gapped bilayer graphene, quasiparticle tunneling and the corresponding Berry phase can be controlled such that they exhibit features of single-layer graphene such as Klein tunneling. The Berry phase is detected by a high-quality Fabry-Pérot interferometer based on bilayer graphene. B... [Phys. Rev. Lett. 121, 127706] Published Fri Sep 21, 2018

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Non-Hermitian Chern Bands (2018)

Shunyu Yao, Fei Song, and Zhong Wang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-25

Beschreibung: Author(s): Shunyu Yao, Fei Song, and Zhong Wang The relation between chiral edge modes and bulk Chern numbers of quantum Hall insulators is a paradigmatic example of bulk-boundary correspondence. We show that the chiral edge modes are not strictly tied to the Chern numbers defined by a non-Hermitian Bloch Hamiltonian. This breakdown of convention... [Phys. Rev. Lett. 121, 136802] Published Mon Sep 24, 2018

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Néel- and Bloch-Type Magnetic Vortices in Rashba Metals (2018)

Satoru Hayami and Yukitoshi Motome

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-26

Beschreibung: Author(s): Satoru Hayami and Yukitoshi Motome We theoretically study noncoplanar spin textures in polar magnetic conductors. Starting from the Kondo lattice model with the Rashba spin-orbit coupling, we derive an effective spin model with generalized Ruderman-Kittel-Kasuya-Yosida interactions including the anisotropic and antisymmetric exchange... [Phys. Rev. Lett. 121, 137202] Published Tue Sep 25, 2018

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Evidence of a Coulomb-Interaction-Induced Lifshitz Transition and Robust Hybrid Weyl Semimetal in ${T}_{d}\text{−}{\mathrm{MoTe}}_{2}$ (2018)

N. Xu, Z. W. Wang, A. Magrez, P. Bugnon, H. Berger, C. E. Matt, V. N. Strocov, N. C. Plumb, M. Radovic, E. Pomjakushina, K. Conder, J. H. Dil, J. Mesot, R. Yu, H. Ding, and M. Shi

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-26

Beschreibung: Author(s): N. Xu, Z. W. Wang, A. Magrez, P. Bugnon, H. Berger, C. E. Matt, V. N. Strocov, N. C. Plumb, M. Radovic, E. Pomjakushina, K. Conder, J. H. Dil, J. Mesot, R. Yu, H. Ding, and M. Shi Using soft x-ray angle-resolved photoemission spectroscopy we probed the bulk electronic structure of T d − MoTe 2 . We found that on-site Coulomb interaction leads to a Lifshitz transition, which is essential for a precise description of the electronic structure. A hybrid Weyl semimetal state with a pai... [Phys. Rev. Lett. 121, 136401] Published Tue Sep 25, 2018

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Signatures of van Hove Singularities Probed by the Supercurrent in a Graphene-hBN Superlattice (2018)

D. I. Indolese, R. Delagrange, P. Makk, J. R. Wallbank, K. Wanatabe, T. Taniguchi, and C. Schönenberger

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-26

Beschreibung: Author(s): D. I. Indolese, R. Delagrange, P. Makk, J. R. Wallbank, K. Wanatabe, T. Taniguchi, and C. Schönenberger The band structure of graphene can be strongly modified if its lattice is aligned with the one of a boron nitride substrate. A moiré superlattice forms, which manifests itself by the appearance of new Dirac points, accompanied by van Hove singularities. In this work, we present supercurrent measurem... [Phys. Rev. Lett. 121, 137701] Published Tue Sep 25, 2018

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Landau Velocity for Collective Quantum Hall Breakdown in Bilayer Graphene (2018)

W. Yang, H. Graef, X. Lu, G. Zhang, T. Taniguchi, K. Watanabe, A. Bachtold, E. H. T. Teo, E. Baudin, E. Bocquillon, G. Fève, J-M. Berroir, D. Carpentier, M. O. Goerbig, and B. Plaçais

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-26

Beschreibung: Author(s): W. Yang, H. Graef, X. Lu, G. Zhang, T. Taniguchi, K. Watanabe, A. Bachtold, E. H. T. Teo, E. Baudin, E. Bocquillon, G. Fève, J-M. Berroir, D. Carpentier, M. O. Goerbig, and B. Plaçais Breakdown of the quantum Hall effect (QHE) is commonly associated with an electric field approaching the inter-Landau-level (LL) Zener field, the ratio of the Landau gap and the cyclotron radius. Eluded in semiconducting heterostructures, in spite of extensive investigation, the intrinsic Zener limi... [Phys. Rev. Lett. 121, 136804] Published Tue Sep 25, 2018

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Level Attraction Due to Dissipative Magnon-Photon Coupling (2018)

M. Harder, Y. Yang, B. M. Yao, C. H. Yu, J. W. Rao, Y. S. Gui, R. L. Stamps, and C.-M. Hu

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-26

Beschreibung: Author(s): M. Harder, Y. Yang, B. M. Yao, C. H. Yu, J. W. Rao, Y. S. Gui, R. L. Stamps, and C.-M. Hu The observation of level attraction between magnons and cavity photons in a solid state system suggests it may be as ubiquitous as level repulsion, with consequences for the field of cavitronics. [Phys. Rev. Lett. 121, 137203] Published Tue Sep 25, 2018

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Berry Phase and Model Wave Function in the Half-Filled Landau Level (2018)

Scott D. Geraedts, Jie Wang, E. H. Rezayi, and F. D. M. Haldane

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-04

Beschreibung: Author(s): Scott D. Geraedts, Jie Wang, E. H. Rezayi, and F. D. M. Haldane A generalization of the single-particle Berry phase to the manybody context provides an effective description of the half-filled Landau level. [Phys. Rev. Lett. 121, 147202] Published Wed Oct 03, 2018

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Selective-Area-Grown Semiconductor-Superconductor Hybrids: A Basis for Topological Networks (2018)

S. Vaitiekėnas, A. M. Whiticar, M.-T. Deng, F. Krizek, J. E. Sestoft, C. J. Palmstrøm, S. Marti-Sanchez, J. Arbiol, P. Krogstrup, L. Casparis, and C. M. Marcus

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-04

Beschreibung: Author(s): S. Vaitiekėnas, A. M. Whiticar, M.-T. Deng, F. Krizek, J. E. Sestoft, C. J. Palmstrøm, S. Marti-Sanchez, J. Arbiol, P. Krogstrup, L. Casparis, and C. M. Marcus We introduce selective area grown hybrid InAs / Al nanowires based on molecular beam epitaxy, allowing arbitrary semiconductor-superconductor networks containing loops and branches. Transport reveals a hard induced gap and unpoisoned 2 e -periodic Coulomb blockade, with temperature dependent 1 e features... [Phys. Rev. Lett. 121, 147701] Published Wed Oct 03, 2018

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Tunable Semiconductors: Control over Carrier States and Excitations in Layered Hybrid Organic-Inorganic Perovskites (2018)

Chi Liu, William Huhn, Ke-Zhao Du, Alvaro Vazquez-Mayagoitia, David Dirkes, Wei You, Yosuke Kanai, David B. Mitzi, and Volker Blum

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-05

Beschreibung: Author(s): Chi Liu, William Huhn, Ke-Zhao Du, Alvaro Vazquez-Mayagoitia, David Dirkes, Wei You, Yosuke Kanai, David B. Mitzi, and Volker Blum For a class of 2D hybrid organic-inorganic perovskite semiconductors based on π -conjugated organic cations, we predict quantitatively how varying the organic and inorganic component allows control over the nature, energy, and localization of carrier states in a quantum-well-like fashion. Our first-p... [Phys. Rev. Lett. 121, 146401] Published Thu Oct 04, 2018

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Hot Nonequilibrium Quasiparticles in Transmon Qubits (2018)

K. Serniak, M. Hays, G. de Lange, S. Diamond, S. Shankar, L. D. Burkhart, L. Frunzio, M. Houzet, and M. H. Devoret

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-11

Beschreibung: Author(s): K. Serniak, M. Hays, G. de Lange, S. Diamond, S. Shankar, L. D. Burkhart, L. Frunzio, M. Houzet, and M. H. Devoret Nonequilibrium quasiparticle excitations degrade the performance of a variety of superconducting circuits. Understanding the energy distribution of these quasiparticles will yield insight into their generation mechanisms, the limitations they impose on superconducting devices, and how to efficiently... [Phys. Rev. Lett. 121, 157701] Published Wed Oct 10, 2018

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Tuning the Two-Electron Hybridization and Spin States in Parallel-Coupled InAs Quantum Dots (2018)

Malin Nilsson, Florinda Viñas Boström, Sebastian Lehmann, Kimberly A. Dick, Martin Leijnse, and Claes Thelander

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-13

Beschreibung: Author(s): Malin Nilsson, Florinda Viñas Boström, Sebastian Lehmann, Kimberly A. Dick, Martin Leijnse, and Claes Thelander We study spin transport in the one- and two-electron regimes of parallel-coupled double quantum dots (DQDs). The DQDs are formed in InAs nanowires by a combination of crystal-phase engineering and electrostatic gating, with an interdot tunnel coupling ( t ) tunable by one order of magnitude. Large sin... [Phys. Rev. Lett. 121, 156802] Published Fri Oct 12, 2018

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Possible Three-Dimensional Nematic Odd-Parity Superconductivity in ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ (2018)

Wen Huang and Hong Yao

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-13

Beschreibung: Author(s): Wen Huang and Hong Yao The superconducting pairing in Sr 2 RuO 4 is widely considered to be chiral p wave with d → k ∼ ( k x + i k y ) z ^ , which belongs to the E u representation of the crystalline D 4 h group. However, this superconducting order appears hard to reconcile with a number of key experiments. In this Letter, based on symmetry ... [Phys. Rev. Lett. 121, 157002] Published Fri Oct 12, 2018

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Superconductivity without Inversion and Time-Reversal Symmetries (2018)

Mark H. Fischer, Manfred Sigrist, and Daniel F. Agterberg

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-13

Beschreibung: Author(s): Mark H. Fischer, Manfred Sigrist, and Daniel F. Agterberg Traditionally, in three dimensions, the only symmetries essential for superconductivity are time reversal ( T ) and inversion ( I ). Here, we examine superconductivity in two dimensions and find that T and I are not required, and having a combination of either symmetry with a mirror operation ( M z ) on th... [Phys. Rev. Lett. 121, 157003] Published Fri Oct 12, 2018

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Evidence for the Presence of the Fulde-Ferrell-Larkin-Ovchinnikov State in ${\mathrm{CeCu}}_{2}{\mathrm{Si}}_{2}$ Revealed Using $^{63}\mathrm{Cu}$ NMR (2018)

Shunsaku Kitagawa, Genki Nakamine, Kenji Ishida, H. S. Jeevan, C. Geibel, and F. Steglich

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-13

Beschreibung: Author(s): Shunsaku Kitagawa, Genki Nakamine, Kenji Ishida, H. S. Jeevan, C. Geibel, and F. Steglich Nuclear magnetic resonance measurements were performed on CeCu 2 Si 2 in the presence of a magnetic field close to the upper critical field μ 0 H c 2 in order to investigate its superconducting (SC) properties near pair-breaking fields. In lower fields, the Knight shift and nuclear spin-lattice relaxation ... [Phys. Rev. Lett. 121, 157004] Published Fri Oct 12, 2018

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From Birefringent Electrons to a Marginal or Non-Fermi Liquid of Relativistic Spin-$1/2$ Fermions: An Emergent Superuniversality (2018)

Bitan Roy, Malcolm P. Kennett, Kun Yang, and Vladimir Juričić

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-13

Beschreibung: Author(s): Bitan Roy, Malcolm P. Kennett, Kun Yang, and Vladimir Juričić We present the quantum critical theory of an interacting nodal Fermi liquid of quasirelativistic pseudospin- 3 / 2 fermions that have a noninteracting birefringent spectrum with two distinct Fermi velocities. When such quasiparticles interact with gapless bosonic degrees of freedom that mediate either ... [Phys. Rev. Lett. 121, 157602] Published Fri Oct 12, 2018

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Emergent Dirac Gullies and Gully-Symmetry-Breaking Quantum Hall States in $ABA$ Trilayer Graphene (2018)

A. A. Zibrov, P. Rao, C. Kometter, E. M. Spanton, J. I. A. Li, Cory R. Dean, T. Taniguchi, K. Watanabe, M. Serbyn, and A. F. Young

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-16

Beschreibung: Author(s): A. A. Zibrov, P. Rao, C. Kometter, E. M. Spanton, J. I. A. Li, Cory R. Dean, T. Taniguchi, K. Watanabe, M. Serbyn, and A. F. Young Researchers observe new features in the band structure of multilayer graphene that point to enhanced electron interactions. [Phys. Rev. Lett. 121, 167601] Published Mon Oct 15, 2018

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Short Note on the Density of States in 3D Weyl Semimetals (2018)

K. Ziegler and A. Sinner

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-16

Beschreibung: Author(s): K. Ziegler and A. Sinner The average density of states in a disordered three-dimensional Weyl system is discussed in the case of a continuous distribution of random scattering. Our results clearly indicate that the average density of states does not vanish, reflecting the absence of a critical point for a metal-insulator tr... [Phys. Rev. Lett. 121, 166401] Published Mon Oct 15, 2018

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Initiating and Monitoring the Evolution of Single Electrons Within Atom-Defined Structures (2018)

Mohammad Rashidi, Wyatt Vine, Thomas Dienel, Lucian Livadaru, Jacob Retallick, Taleana Huff, Konrad Walus, and Robert A. Wolkow

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-16

Beschreibung: Author(s): Mohammad Rashidi, Wyatt Vine, Thomas Dienel, Lucian Livadaru, Jacob Retallick, Taleana Huff, Konrad Walus, and Robert A. Wolkow Using a noncontact atomic force microscope, we track and manipulate the position of single electrons confined to atomic structures engineered from silicon dangling bonds on the hydrogen terminated silicon surface. An attractive tip surface interaction mechanically manipulates the equilibrium positio... [Phys. Rev. Lett. 121, 166801] Published Mon Oct 15, 2018

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Theory of Phonon-Mediated Superconductivity in Twisted Bilayer Graphene (2018)

Fengcheng Wu, A. H. Mac; Donald, and Ivar Martin

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-18

Beschreibung: Author(s): Fengcheng Wu, A. H. MacDonald, and Ivar Martin We present a theory of phonon-mediated superconductivity in near magic angle twisted bilayer graphene. Using a microscopic model for phonon coupling to moiré band electrons, we find that phonons generate attractive interactions in both s - and d -wave pairing channels and that the attraction is strong... [Phys. Rev. Lett. 121, 257001] Published Mon Dec 17, 2018

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Winding Vector: How to Annihilate Two Dirac Points with the Same Charge (2018)

Gilles Montambaux, Lih-King Lim, Jean-Noël Fuchs, and Frédéric Piéchon

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-19

Beschreibung: Author(s): Gilles Montambaux, Lih-King Lim, Jean-Noël Fuchs, and Frédéric Piéchon The merging or emergence of a pair of Dirac points may be classified according to whether the winding numbers which characterize them are opposite ( + − scenario) or identical ( + + scenario). From the touching point between two parabolic bands (one of them can be flat), two Dirac points with the same w... [Phys. Rev. Lett. 121, 256402] Published Tue Dec 18, 2018

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Electron-Hole Tunneling Revealed by Quantum Oscillations in the Nodal-Line Semimetal HfSiS (2018)

M. R. van Delft, S. Pezzini, T. Khouri, C. S. A. Müller, M. Breitkreiz, L. M. Schoop, A. Carrington, N. E. Hussey, and S. Wiedmann

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-19

Beschreibung: Author(s): M. R. van Delft, S. Pezzini, T. Khouri, C. S. A. Müller, M. Breitkreiz, L. M. Schoop, A. Carrington, N. E. Hussey, and S. Wiedmann We report a study of quantum oscillations in the high-field magnetoresistance of the nodal-line semimetal HfSiS. In the presence of a magnetic field up to 31 T parallel to the c axis, we observe quantum oscillations originating both from orbits of individual electron and hole pockets, and from magne... [Phys. Rev. Lett. 121, 256602] Published Tue Dec 18, 2018

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Unconventional Anisotropic Even-Denominator Fractional Quantum Hall State in a System with Mass Anisotropy (2018)

Md. Shafayat Hossain, Meng K. Ma, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-19

Beschreibung: Author(s): Md. Shafayat Hossain, Meng K. Ma, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan Control of mass anisotropy in atypical fractional quantum Hall states provides new information on candidates for topological quantum computation. [Phys. Rev. Lett. 121, 256601] Published Tue Dec 18, 2018

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Spin Excitations in a $4f−3d$ Heterodimer on MgO (2018)

A. Singha, F. Donati, F. D. Natterer, C. Wäckerlin, S. Stavrić, Z. S. Popović, Ž. Šljivančanin, F. Patthey, and H. Brune

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-19

Beschreibung: Author(s): A. Singha, F. Donati, F. D. Natterer, C. Wäckerlin, S. Stavrić, Z. S. Popović, Ž. Šljivančanin, F. Patthey, and H. Brune We report on the magnetic properties of HoCo dimers as a model system for the smallest intermetallic compound of a lanthanide and a transition metal atom. The dimers are adsorbed on ultrathin MgO(100) films grown on Ag(100). New for 4 f elements, we detect inelastic excitations with scanning tunnelin... [Phys. Rev. Lett. 121, 257202] Published Tue Dec 18, 2018

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Origins of Thermal Spin Depolarization in Half-Metallic Ferromagnet ${\mathrm{CrO}}_{2}$ (2018)

Hirokazu Fujiwara, Kensei Terashima, Masanori Sunagawa, Yuko Yano, Takanobu Nagayama, Tetsushi Fukura, Fumiya Yoshii, Yuka Matsuura, Makoto Ogata, Takanori Wakita, Koichiro Yaji, Ayumi Harasawa, Kenta Kuroda, Shik Shin, Koji Horiba, Hiroshi Kumigashira, Yuji Muraoka, and Takayoshi Yokoya

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-19

Beschreibung: Author(s): Hirokazu Fujiwara, Kensei Terashima, Masanori Sunagawa, Yuko Yano, Takanobu Nagayama, Tetsushi Fukura, Fumiya Yoshii, Yuka Matsuura, Makoto Ogata, Takanori Wakita, Koichiro Yaji, Ayumi Harasawa, Kenta Kuroda, Shik Shin, Koji Horiba, Hiroshi Kumigashira, Yuji Muraoka, and Takayoshi Yokoya Using high-resolution spin-resolved photoemission spectroscopy, we observe a thermal spin depolarization to which all spin-polarized electrons contribute. Furthermore, we observe a distinct minority spin state near the Fermi level and a corresponding depolarization that seldom contributes to demagne... [Phys. Rev. Lett. 121, 257201] Published Tue Dec 18, 2018

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Extreme Asymmetry in Metasurfaces via Evanescent Fields Engineering: Angular-Asymmetric Absorption (2018)

Xuchen Wang, Ana Díaz-Rubio, Viktar S. Asadchy, Grigorii Ptitcyn, Andrey A. Generalov, Juha Ala-Laurinaho, and Sergei A. Tretyakov

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-20

Beschreibung: Author(s): Xuchen Wang, Ana Díaz-Rubio, Viktar S. Asadchy, Grigorii Ptitcyn, Andrey A. Generalov, Juha Ala-Laurinaho, and Sergei A. Tretyakov On the quest towards full control over wave propagation, the development of compact devices that allow asymmetric response is a challenge. In this Letter, we introduce a new paradigm for the engineering of asymmetry in planar structures, revealing and exploiting unilateral excitation of evanescent w... [Phys. Rev. Lett. 121, 256802] Published Wed Dec 19, 2018

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Ultrafast Formation of a Fermi-Dirac Distributed Electron Gas (2018)

G. Rohde, A. Stange, A. Müller, M. Behrendt, L.-P. Oloff, K. Hanff, T. J. Albert, P. Hein, K. Rossnagel, and M. Bauer

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-20

Beschreibung: Author(s): G. Rohde, A. Stange, A. Müller, M. Behrendt, L.-P. Oloff, K. Hanff, T. J. Albert, P. Hein, K. Rossnagel, and M. Bauer An ultrafast photoemission experiment characterizes the processes by which photoexcited electrons in graphite return to thermal equilibrium. [Phys. Rev. Lett. 121, 256401] Published Wed Dec 19, 2018

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Multiple Chiral Majorana Fermion Modes and Quantum Transport (2018)

Jing Wang and Biao Lian

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-20

Beschreibung: Author(s): Jing Wang and Biao Lian The chiral Majorana fermion is a massless self-conjugate fermionic particle that could arise as the quasiparticle edge state of a two-dimensonal topological state of matter. Here we propose a new platform for a chiral topological superconductor (TSC) in two dimensions with multiple N chiral Majorana... [Phys. Rev. Lett. 121, 256801] Published Wed Dec 19, 2018

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Hybridization of Subgap States in One-Dimensional Superconductor-Semiconductor Coulomb Islands (2018)

E. C. T. O’Farrell, A. C. C. Drachmann, M. Hell, A. Fornieri, A. M. Whiticar, E. B. Hansen, S. Gronin, G. C. Gardner, C. Thomas, M. J. Manfra, K. Flensberg, C. M. Marcus, and F. Nichele

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-20

Beschreibung: Author(s): E. C. T. O’Farrell, A. C. C. Drachmann, M. Hell, A. Fornieri, A. M. Whiticar, E. B. Hansen, S. Gronin, G. C. Gardner, C. Thomas, M. J. Manfra, K. Flensberg, C. M. Marcus, and F. Nichele We present measurements of one-dimensional superconductor-semiconductor Coulomb islands, fabricated by gate confinement of a two-dimensional InAs heterostructure with an epitaxial Al layer. When tuned via electrostatic side gates to regimes without subgap states, Coulomb blockade reveals Cooper-pair... [Phys. Rev. Lett. 121, 256803] Published Wed Dec 19, 2018

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Cooperative Charge Pumping and Enhanced Skyrmion Mobility (2018)

Adel Abbout, Joseph Weston, Xavier Waintal, and Aurélien Manchon

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-20

Beschreibung: Author(s): Adel Abbout, Joseph Weston, Xavier Waintal, and Aurélien Manchon It is well known that moving magnetic textures may pump spin and charge currents along the direction of motion, a phenomenon called electronic pumping. Here, the electronic pumping arising from the steady motion of ferromagnetic skyrmions is investigated by solving the time evolution of the Schrödin... [Phys. Rev. Lett. 121, 257203] Published Wed Dec 19, 2018

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Supercurrent in a Double Quantum Dot (2018)

J. C. Estrada Saldaña, A. Vekris, G. Steffensen, R. Žitko, P. Krogstrup, J. Paaske, K. Grove-Rasmussen, and J. Nygård

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-21

Beschreibung: Author(s): J. C. Estrada Saldaña, A. Vekris, G. Steffensen, R. Žitko, P. Krogstrup, J. Paaske, K. Grove-Rasmussen, and J. Nygård We demonstrate the Josephson effect in a serial double quantum dot defined in a nanowire with epitaxial superconducting leads. The supercurrent stability diagram adopts a honeycomb pattern. We observe sharp discontinuities in the magnitude of the critical current, I c , as a function of dot occupation... [Phys. Rev. Lett. 121, 257701] Published Thu Dec 20, 2018

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Topologically Nontrivial Valley States in Bilayer Graphene Quantum Point Contacts (2018)

Hiske Overweg, Angelika Knothe, Thomas Fabian, Lukas Linhart, Peter Rickhaus, Lucien Wernli, Kenji Watanabe, Takashi Taniguchi, David Sánchez, Joachim Burgdörfer, Florian Libisch, Vladimir I. Fal’ko, Klaus Ensslin, and Thomas Ihn

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-21

Beschreibung: Author(s): Hiske Overweg, Angelika Knothe, Thomas Fabian, Lukas Linhart, Peter Rickhaus, Lucien Wernli, Kenji Watanabe, Takashi Taniguchi, David Sánchez, Joachim Burgdörfer, Florian Libisch, Vladimir I. Fal’ko, Klaus Ensslin, and Thomas Ihn We present measurements of quantized conductance in electrostatically induced quantum point contacts in bilayer graphene. The application of a perpendicular magnetic field leads to an intricate pattern of lifted and restored degeneracies with increasing field: at zero magnetic field the degeneracy o... [Phys. Rev. Lett. 121, 257702] Published Thu Dec 20, 2018

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Observation of Weakened V—V Dimers in the Monoclinic Metallic Phase of Strained ${\mathrm{VO}}_{2}$ (2018)

J. Laverock, V. Jovic, A. A. Zakharov, Y. R. Niu, S. Kittiwatanakul, B. Westhenry, J. W. Lu, S. A. Wolf, and K. E. Smith

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-21

Beschreibung: Author(s): J. Laverock, V. Jovic, A. A. Zakharov, Y. R. Niu, S. Kittiwatanakul, B. Westhenry, J. W. Lu, S. A. Wolf, and K. E. Smith Emergent order at mesoscopic length scales in condensed matter can provide fundamental insight into the underlying competing interactions and their relationship with the order parameter. Using spectromicroscopy, we show that mesoscopic stripe order near the metal-insulator transition (MIT) of strain... [Phys. Rev. Lett. 121, 256403] Published Thu Dec 20, 2018

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Valley Subband Splitting in Bilayer Graphene Quantum Point Contacts (2018)

R. Kraft, I. V. Krainov, V. Gall, A. P. Dmitriev, R. Krupke, I. V. Gornyi, and R. Danneau

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-12-21

Beschreibung: Author(s): R. Kraft, I. V. Krainov, V. Gall, A. P. Dmitriev, R. Krupke, I. V. Gornyi, and R. Danneau We report a study of one-dimensional subband splitting in a bilayer graphene quantum point contact in which quantized conductance in steps of 4 e 2 / h is clearly defined down to the lowest subband. While our source-drain bias spectroscopy measurements reveal an unconventional confinement, we observe a ... [Phys. Rev. Lett. 121, 257703] Published Thu Dec 20, 2018

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Dynamic Structure Factor of Disordered Quantum Spin Ladders (2018)

Max Hörmann, Paul Wunderlich, and K. P. Schmidt

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-17

Beschreibung: Author(s): Max Hörmann, Paul Wunderlich, and K. P. Schmidt We investigate the impact of quenched disorder on the zero-temperature dynamic structure factor of two-leg quantum spin ladders. Using linked-cluster expansions and bond-operator mean-field theory, huge effects on individual quasiparticles but also on composite bound states and two-quasiparticle con... [Phys. Rev. Lett. 121, 167201] Published Tue Oct 16, 2018

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Spin-Orbit-Torque Memory Operation of Synthetic Antiferromagnets (2018)

Takahiro Moriyama, Weinan Zhou, Takeshi Seki, Koki Takanashi, and Teruo Ono

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-19

Beschreibung: Author(s): Takahiro Moriyama, Weinan Zhou, Takeshi Seki, Koki Takanashi, and Teruo Ono In this Letter, we show the demonstration of a sequential antiferromagnetic memory operation with a spin-orbit-torque write, by the spin Hall effect, and a resistive read in the CoGd synthetic antiferromagnetic bits, in which we reveal the distinct differences in the spin-orbit-torque and field-indu... [Phys. Rev. Lett. 121, 167202] Published Thu Oct 18, 2018

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Unusual Interplay between Superconductivity and Field-Induced Charge Order in ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{y}$ (2018)

J. Kačmarčík, I. Vinograd, B. Michon, A. Rydh, A. Demuer, R. Zhou, H. Mayaffre, R. Liang, W. N. Hardy, D. A. Bonn, N. Doiron-Leyraud, L. Taillefer, M.-H. Julien, C. Marcenat, and T. Klein

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-19

Beschreibung: Author(s): J. Kačmarčík, I. Vinograd, B. Michon, A. Rydh, A. Demuer, R. Zhou, H. Mayaffre, R. Liang, W. N. Hardy, D. A. Bonn, N. Doiron-Leyraud, L. Taillefer, M.-H. Julien, C. Marcenat, and T. Klein We present a detailed study of the temperature ( T ) and magnetic field ( H ) dependence of the electronic density of states (DOS) at the Fermi level, as deduced from specific heat and Knight shift measurements in underdoped YBa 2 Cu 3 O y . We find that the DOS becomes field independent above a characteristi... [Phys. Rev. Lett. 121, 167002] Published Thu Oct 18, 2018

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Transconducting Transition for a Dynamic Boundary Coupled to Several Luttinger Liquids (2018)

B. Horovitz, T. Giamarchi, and P. Le Doussal

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-18

Beschreibung: Author(s): B. Horovitz, T. Giamarchi, and P. Le Doussal We study a dynamic boundary, e.g., a mobile impurity, coupled to N independent Tomonaga-Luttinger liquids (TLLs) each with interaction parameter K . We demonstrate that for N ≥ 2 there is a quantum phase transition at K ≥ 1 / 2 , where the TLL phases lock together at the particle position, resulting in a no... [Phys. Rev. Lett. 121, 166803] Published Wed Oct 17, 2018

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Superconducting Tunneling Spectroscopy of Spin-Orbit Coupling and Orbital Depairing in $\mathrm{Nb}:{\mathrm{SrTiO}}_{3}$ (2018)

Adrian G. Swartz, Alfred K. C. Cheung, Hyeok Yoon, Zhuoyu Chen, Yasuyuki Hikita, Srinivas Raghu, and Harold Y. Hwang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-20

Beschreibung: Author(s): Adrian G. Swartz, Alfred K. C. Cheung, Hyeok Yoon, Zhuoyu Chen, Yasuyuki Hikita, Srinivas Raghu, and Harold Y. Hwang We have examined the intrinsic spin-orbit coupling and orbital depairing in thin films of Nb-doped SrTiO 3 by superconducting tunneling spectroscopy. The orbital depairing is geometrically suppressed in the two-dimensional limit, enabling a quantitative evaluation of the Fermi level spin-orbit scatte... [Phys. Rev. Lett. 121, 167003] Published Fri Oct 19, 2018

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

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Interaction Effects with Varying $N$ in $\mathrm{SU}(N)$ Symmetric Fermion Lattice Systems (2018)

Shenglong Xu, Julio T. Barreiro, Yu Wang, and Congjun Wu

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-20

Beschreibung: Author(s): Shenglong Xu, Julio T. Barreiro, Yu Wang, and Congjun Wu The interaction effects in ultracold Fermi gases with SU ( N ) symmetry are studied nonperturbatively in half filled one-dimensional lattices by employing quantum Monte Carlo simulations. We find that, as N increases, weak and strong interacting systems are driven to a crossover region, but from opposi... [Phys. Rev. Lett. 121, 167205] Published Fri Oct 19, 2018

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Disorder-Driven Quantum Transition in Relativistic Semimetals: Functional Renormalization via the Porous Medium Equation (2018)

Ivan Balog, David Carpentier, and Andrei A. Fedorenko

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-20

Beschreibung: Author(s): Ivan Balog, David Carpentier, and Andrei A. Fedorenko In the presence of randomness, a relativistic semimetal undergoes a quantum transition towards a diffusive phase. A standard approach relates this transition to the U ( N ) Gross-Neveu model in the limit of N → 0 . We show that the corresponding fixed point is infinitely unstable, demonstrating the necess... [Phys. Rev. Lett. 121, 166402] Published Fri Oct 19, 2018

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Electron Mass Enhancement near a Nematic Quantum Critical Point in ${\mathrm{NaFe}}_{1−x}{\mathrm{Co}}_{x}\mathrm{As}$ (2018)

C. G. Wang, Z. Li, J. Yang, L. Y. Xing, G. Y. Dai, X. C. Wang, C. Q. Jin, R. Zhou, and Guo-qing Zheng

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-20

Beschreibung: Author(s): C. G. Wang, Z. Li, J. Yang, L. Y. Xing, G. Y. Dai, X. C. Wang, C. Q. Jin, R. Zhou, and Guo-qing Zheng A magnetic order can be completely suppressed at zero temperature ( T ), by doping carriers or applying pressure, at a quantum critical point, around which physical properties change drastically. However, the situation is unclear for an electronic nematic order that breaks rotation symmetry. Here, we ... [Phys. Rev. Lett. 121, 167004] Published Fri Oct 19, 2018

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Symmetries and Many-Body Excitations with Neural-Network Quantum States (2018)

Kenny Choo, Giuseppe Carleo, Nicolas Regnault, and Titus Neupert

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-20

Beschreibung: Author(s): Kenny Choo, Giuseppe Carleo, Nicolas Regnault, and Titus Neupert Artificial neural networks have been recently introduced as a general ansatz to represent many-body wave functions. In conjunction with variational Monte Carlo calculations, this ansatz has been applied to find Hamiltonian ground states and their energies. Here, we provide extensions of this method ... [Phys. Rev. Lett. 121, 167204] Published Fri Oct 19, 2018

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Topology and Geometry of Spin Origami (2018)

Krishanu Roychowdhury, D. Zeb Rocklin, and Michael J. Lawler

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-24

Beschreibung: Author(s): Krishanu Roychowdhury, D. Zeb Rocklin, and Michael J. Lawler A broad class of frustrated magnets show degenerate ground states which can be mapped onto the folding motions of origami sheets. [Phys. Rev. Lett. 121, 177201] Published Tue Oct 23, 2018

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Linear-in-Frequency Optical Conductivity in GdPtBi due to Transitions near the Triple Points (2018)

F. Hütt, A. Yaresko, M. B. Schilling, C. Shekhar, C. Felser, M. Dressel, and A. V. Pronin

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-25

Beschreibung: Author(s): F. Hütt, A. Yaresko, M. B. Schilling, C. Shekhar, C. Felser, M. Dressel, and A. V. Pronin The complex optical conductivity of the half-Heusler compound GdPtBi is measured in a frequency range from 20 to 22 000 cm − 1 (2.5 meV–2.73 eV) at temperatures down to 10 K in zero magnetic field. We find the real part of the conductivity, σ 1 ( ω ) , to be almost perfectly linear in frequency over a bro... [Phys. Rev. Lett. 121, 176601] Published Wed Oct 24, 2018

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Accessing the Intrinsic Spin Transport in a Topological Insulator by Controlling the Crossover of Bulk-to-Surface Conductance (2018)

Wonhee Ko, Giang D. Nguyen, Hoil Kim, Jun Sung Kim, X.-G. Zhang, and An-Ping Li

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-25

Beschreibung: Author(s): Wonhee Ko, Giang D. Nguyen, Hoil Kim, Jun Sung Kim, X.-G. Zhang, and An-Ping Li We report a method to control contributions of bulk and surface states in the topological insulator Bi 2 Te 2 Se that allows accessing the spin-polarized transport endowed by topological surface states. An intrinsic surface dominant transport is established when cooling the sample to low temperature or ... [Phys. Rev. Lett. 121, 176801] Published Wed Oct 24, 2018

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Infrared Spectroscopy of the Topological Surface States of ${\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ by Use of the Berreman Effect (2018)

Enrico Falsetti, Alessandro Nucara, Pavel P. Shibayev, Maryam Salehi, Jisoo Moon, Seongshik Oh, Jean-Blaise Brubach, Pascale Roy, Michele Ortolani, and Paolo Calvani

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-25

Beschreibung: Author(s): Enrico Falsetti, Alessandro Nucara, Pavel P. Shibayev, Maryam Salehi, Jisoo Moon, Seongshik Oh, Jean-Blaise Brubach, Pascale Roy, Michele Ortolani, and Paolo Calvani The Berreman effect (BE) allows one to study the electrodynamics of ultrathin conducting films at the surface of dielectrics by use of grazing-angle infrared spectroscopy and polarized radiation. Here, we first apply the BE to the two-dimensional electron system (2DES) at the interface between a hig... [Phys. Rev. Lett. 121, 176803] Published Wed Oct 24, 2018

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Quadrupolar Exchange-Only Spin Qubit (2018)

Maximilian Russ, J. R. Petta, and Guido Burkard

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-26

Beschreibung: Author(s): Maximilian Russ, J. R. Petta, and Guido Burkard A proposed spin qubit that finds a sweet spot between control and change noise may enable computation with high-speed qubit operations and very long coherence times. [Phys. Rev. Lett. 121, 177701] Published Thu Oct 25, 2018

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Mapping Topological to Conformal Field Theories through strange Correlators (2018)

Robijn Vanhove, Matthias Bal, Dominic J. Williamson, Nick Bultinck, Jutho Haegeman, and Frank Verstraete

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-10-27

Beschreibung: Author(s): Robijn Vanhove, Matthias Bal, Dominic J. Williamson, Nick Bultinck, Jutho Haegeman, and Frank Verstraete We extend the concept of strange correlators, defined for symmetry-protected phases in You et al. [ Phys. Rev. Lett. 112 , 247202 (2014) ], to topological phases of matter by taking the inner product between string-net ground states and product states. The resulting two-dimensional partition functions ... [Phys. Rev. Lett. 121, 177203] Published Fri Oct 26, 2018

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Temperature-Driven Topological Phase Transition and Intermediate Dirac Semimetal Phase in ${\mathrm{ZrTe}}_{5}$ (2018)

B. Xu, L. X. Zhao, P. Marsik, E. Sheveleva, F. Lyzwa, Y. M. Dai, G. F. Chen, X. G. Qiu, and C. Bernhard

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-11-01

Beschreibung: Author(s): B. Xu, L. X. Zhao, P. Marsik, E. Sheveleva, F. Lyzwa, Y. M. Dai, G. F. Chen, X. G. Qiu, and C. Bernhard We present an infrared spectroscopy study of ZrTe 5 , which confirms a recent theoretical proposal that this material exhibits a temperature-driven topological quantum phase transition from a weak to a strong topological insulating state with an intermediate Dirac semimetal state around T p ≃ 138 K . Our... [Phys. Rev. Lett. 121, 187401] Published Wed Oct 31, 2018

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Frustrated Structural Instability in Superconducting Quasi-One-Dimensional ${\mathrm{K}}_{2}{\mathrm{Cr}}_{3}{\mathrm{As}}_{3}$ (2018)

Keith M. Taddei, Guangzong Xing, Jifeng Sun, Yuhao Fu, Yuwei Li, Qiang Zheng, Athena S. Sefat, David J. Singh, and Clarina de la Cruz

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-11-01

Beschreibung: Author(s): Keith M. Taddei, Guangzong Xing, Jifeng Sun, Yuhao Fu, Yuwei Li, Qiang Zheng, Athena S. Sefat, David J. Singh, and Clarina de la Cruz We present density functional theory and neutron total scattering studies on quasi-one-dimensional superconducting K 2 Cr 3 As 3 revealing a frustrated structural instability. Our first principles calculations find a significant phonon instability, which, under energy minimization, corresponds to a frust... [Phys. Rev. Lett. 121, 187002] Published Wed Oct 31, 2018

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