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High-fidelity quantum memory utilizing inhomogeneous nuclear polarization in a quantum dot (2014)

Wenkui Ding, Anqi Shi, J. Q. You, and Wenxian Zhang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-12

Beschreibung: Author(s): Wenkui Ding, Anqi Shi, J. Q. You, and Wenxian Zhang We numerically investigate the encoding and retrieval processes for quantum memory realized in a semiconductor quantum dot by focusing on the effect of inhomogeneously polarized nuclear spins whose polarization depends on the local hyperfine coupling strength. We find that the performance of quantum... [Phys. Rev. B 90, 235421] Published Thu Dec 11, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Effect of hole doping on the magnetism of point defects in graphene: A theoretical study (2014)

Felix Yndurain

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-12

Beschreibung: Author(s): Felix Yndurain Using ab initio methods based on the density functional theory, we study the magnetic properties of different point defects in graphene. We consider separately, atomic hydrogen, atomic fluorine, and single vacancies. The three defects have completely different magnetic properties. A local spin one-h... [Phys. Rev. B 90, 245420] Published Thu Dec 11, 2014

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Interaction of localized surface plasmons with chiral molecules (2014)

T. J. Davis and D. E. Gómez

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-16

Beschreibung: Author(s): T. J. Davis and D. E. Gómez A complete theoretical methodology of the interactions between chiral molecules and the evanescent fields of localized surface plasmons generated in a metallic nanostructure of arbitrary shape. The calculations confirm various previous results on the enhancement of the absorption of light and subsequent circular dichroism by surface plasmons. They also predict a chirality-dependent absorption arising from the metallic nanostructure illuminated with linearly polarized light. [Phys. Rev. B 90, 235424] Published Mon Dec 15, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Time reversal symmetry broken fractional topological phases at zero magnetic field (2014)

Tobias Meng and Eran Sela

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-16

Beschreibung: Author(s): Tobias Meng and Eran Sela We extend the coupled-wire construction of quantum Hall phases, and search for fractional topological insulating states in models of weakly coupled wires at zero external magnetic field. Focusing on systems beyond double copies of fractional quantum Hall states at opposite fields, we find that spin-... [Phys. Rev. B 90, 235425] Published Mon Dec 15, 2014

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Topographic measurement of buried thin-film interfaces using a grazing resonant soft x-ray scattering technique (2014)

Eliot Gann, Anne Watson, John R. Tumbleston, Justin Cochran, Hongping Yan, Cheng Wang, Jaewook Seok, Michael Chabinyc, and Harald Ade

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-16

Beschreibung: Author(s): Eliot Gann, Anne Watson, John R. Tumbleston, Justin Cochran, Hongping Yan, Cheng Wang, Jaewook Seok, Michael Chabinyc, and Harald Ade The internal structures of thin films, particularly interfaces between different materials, are critical to system properties and performance across many disciplines, but characterization of buried interface topography is often unfeasible. In this work, we demonstrate that grazing resonant soft x-ra... [Phys. Rev. B 90, 245421] Published Mon Dec 15, 2014

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Spin-polarized dynamic transport in tubular two-dimensional electron gases (2014)

E. A. Rothstein, B. Horovitz, O. Entin-Wohlman, and A. Aharony

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-18

Beschreibung: Author(s): E. A. Rothstein, B. Horovitz, O. Entin-Wohlman, and A. Aharony The ac conductance of a finite tubular two-dimensional electron gas is studied in the presence of the Rashba spin-orbit interaction. When the tube is coupled to two reservoirs, that interaction splits the steps in the dc current, introducing energy ranges with spin-polarized currents. For this setup... [Phys. Rev. B 90, 245425] Published Wed Dec 17, 2014

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Spectrum of edge states in the ν=0 quantum Hall phases in graphene (2014)

P. K. Pyatkovskiy and V. A. Miransky

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-07

Beschreibung: Author(s): P. K. Pyatkovskiy and V. A. Miransky Edge excitations of the ν=0 quantum Hall state in monolayer graphene are studied within the mean-field theory with different symmetry-breaking terms. The analytical expressions for the continuum (Dirac) model wave functions are obtained for the charge density wave, Kekulé distortion, ferromagnetic, ... [Phys. Rev. B 90, 195407] Published Thu Nov 06, 2014

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Stabilization and Manipulation of Electronically Phase-Separated Ground States in Defective Indium Atom Wires on Silicon (2014)

Hui Zhang, Fangfei Ming, Hyun-Jung Kim, Hongbin Zhu, Qiang Zhang, Hanno H. Weitering, Xudong Xiao, Changgan Zeng, Jun-Hyung Cho, and Zhenyu Zhang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-11-07

Beschreibung: Author(s): Hui Zhang, Fangfei Ming, Hyun-Jung Kim, Hongbin Zhu, Qiang Zhang, Hanno H. Weitering, Xudong Xiao, Changgan Zeng, Jun-Hyung Cho, and Zhenyu Zhang Exploration and manipulation of electronic states in low-dimensional systems are of great importance in the fundamental and practical aspects of nanomaterial and nanotechnology. Here, we demonstrate that the incorporation of vacancy defects into monatomic indium wires on n-type Si(111) can stabilize... [Phys. Rev. Lett. 113, 196802] Published Thu Nov 06, 2014

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

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9

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Noncoplanar and Counterrotating Incommensurate Magnetic Order Stabilized by Kitaev Interactions in γ-Li2IrO3 (2014)

A. Biffin, R. D. Johnson, I. Kimchi, R. Morris, A. Bombardi, J. G. Analytis, A. Vishwanath, and R. Coldea

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-11-07

Beschreibung: Author(s): A. Biffin, R. D. Johnson, I. Kimchi, R. Morris, A. Bombardi, J. G. Analytis, A. Vishwanath, and R. Coldea Materials that realize Kitaev spin models with bond-dependent anisotropic interactions have long been searched for, as the resulting frustration effects are predicted to stabilize novel forms of magnetic order or quantum spin liquids. Here, we explore the magnetism of γ-Li2IrO3, which has the topolo... [Phys. Rev. Lett. 113, 197201] Published Thu Nov 06, 2014

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Revealing Topological Superconductivity in Extended Quantum Spin Hall Josephson Junctions (2014)

Shu-Ping Lee, Karen Michaeli, Jason Alicea, and Amir Yacoby

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-11-07

Beschreibung: Author(s): Shu-Ping Lee, Karen Michaeli, Jason Alicea, and Amir Yacoby Quantum spin Hall–superconductor hybrids are promising sources of topological superconductivity and Majorana modes, particularly given recent progress on HgTe and InAs/GaSb. We propose a new method of revealing topological superconductivity in extended quantum spin Hall Josephson junctions supportin... [Phys. Rev. Lett. 113, 197001] Published Thu Nov 06, 2014

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What Determines the Fermi Wave Vector of Composite Fermions? (2014)

D. Kamburov, Yang Liu, M. A. Mueed, M. Shayegan, L. N. Pfeiffer, K. W. West, and K. W. Baldwin

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-11-07

Beschreibung: Author(s): D. Kamburov, Yang Liu, M. A. Mueed, M. Shayegan, L. N. Pfeiffer, K. W. West, and K. W. Baldwin Composite fermions (CFs), exotic particles formed by pairing an even number of flux quanta to each electron, provide a fascinating description of phenomena exhibited by interacting two-dimensional electrons at high magnetic fields. At and near Landau level filling ν=1/2, CFs occupy a Fermi sea and e... [Phys. Rev. Lett. 113, 196801] Published Thu Nov 06, 2014

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Solid-state dewetting with a magic thickness: Electronic dewetting (2014)

Anna Chame and Olivier Pierre-Louis

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): Anna Chame and Olivier Pierre-Louis We investigate the dewetting dynamics of ultrathin solid metal films. In these films, quantum confinement of electrons is known to produce a complex wetting potential, leading to “magic thicknesses” which are strongly favored energetically. We introduce a kinetic Monte Carlo model which accounts for... [Phys. Rev. B 90, 195408] Published Fri Nov 07, 2014

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First-principles and spectroscopic studies of Bi(110) films: Thickness-dependent Dirac modes and property oscillations (2014)

G. Bian, X. Wang, T. Miller, T.-C. Chiang, P. J. Kowalczyk, O. Mahapatra, and S. A. Brown

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): G. Bian, X. Wang, T. Miller, T.-C. Chiang, P. J. Kowalczyk, O. Mahapatra, and S. A. Brown The electronic structure of Bi(110) thin films as a function of film thickness is investigated by first-principles calculations, angle-resolved photoemission spectroscopy, and scanning tunneling microscopy. Energy minimization in the calculation reveals significant atomic relaxation and rebonding at... [Phys. Rev. B 90, 195409] Published Fri Nov 07, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Magnetic field spectral crossings of Luttinger holes in quantum wells (2014)

G. E. Simion and Y. B. Lyanda-Geller

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): G. E. Simion and Y. B. Lyanda-Geller We develop an analytic approach to two-dimensional (2D) holes in a magnetic field that allows us to gain insight into physics of measuring the parameters of holes, such as cyclotron resonance, Shubnikov-de Haas effect and spin resonance. We derive hole energies, cyclotron masses, and the g factors i... [Phys. Rev. B 90, 195410] Published Fri Nov 07, 2014

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Density of states at disorder-induced phase transitions in a multichannel Majorana wire (2014)

Maria-Theresa Rieder and Piet W. Brouwer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): Maria-Theresa Rieder and Piet W. Brouwer An N-channel spinless p-wave superconducting wire is known to go through a series of N topological phase transitions upon increasing the disorder strength. Here, we show that at each of those transitions the density of states shows a Dyson singularity ν(ɛ)∝ɛ−1|lnɛ|−3, whereas ν(ɛ)∝ɛ|α|−1 has a power... [Phys. Rev. B 90, 205404] Published Fri Nov 07, 2014

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Optical tracing of multiple charges in single-electron devices (2014)

Sanli Faez, Sense Jan van der Molen, and Michel Orrit

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): Sanli Faez, Sense Jan van der Molen, and Michel Orrit Single molecules that exhibit narrow optical transitions at cryogenic temperatures can be used as local electric-field sensors. We derive the single-charge sensitivity of aromatic organic dye molecules, based on quantum mechanical considerations. Through numerical modeling, we demonstrate that by us... [Phys. Rev. B 90, 205405] Published Fri Nov 07, 2014

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17

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Manipulation and Characterization of Aperiodical Graphene Structures Created in a Two-Dimensional Electron Gas (2014)

Shiyong Wang, Liang Z. Tan, Weihua Wang, Steven G. Louie, and Nian Lin

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): Shiyong Wang, Liang Z. Tan, Weihua Wang, Steven G. Louie, and Nian Lin We demonstrate that Dirac fermions can be created and manipulated in a two-dimensional electron gas (2DEG). Using a cryogenic scanning tunneling microscope, we arranged coronene molecules one by one on a Cu(111) surface to construct artificial graphene nanoribbons with perfect zigzag (ZGNRs) or arm-... [Phys. Rev. Lett. 113, 196803] Published Fri Nov 07, 2014

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18

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Vaporization of Kitaev Spin Liquids (2014)

Joji Nasu, Masafumi Udagawa, and Yukitoshi Motome

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): Joji Nasu, Masafumi Udagawa, and Yukitoshi Motome The quantum spin liquid is an exotic quantum state of matter in magnets. This state is a spin analog of liquid helium that does not solidify down to the lowest temperature due to strong quantum fluctuations. In conventional fluids, the liquid and gas possess the same symmetry and adiabatically conne... [Phys. Rev. Lett. 113, 197205] Published Fri Nov 07, 2014

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Fractionalized Charge Excitations in a Spin Liquid on Partially Filled Pyrochlore Lattices (2014)

Gang Chen, Hae-Young Kee, and Yong Baek Kim

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): Gang Chen, Hae-Young Kee, and Yong Baek Kim We study the Mott transition from a metal to cluster Mott insulators in the 1/4- and Please note that APS made slight change to the title of the paper1/8-filled pyrochlore lattice systems. It is shown that such Mott transitions can arise due to charge localization in clusters or in tetrahedron units... [Phys. Rev. Lett. 113, 197202] Published Fri Nov 07, 2014

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Sufficient Condition for Entanglement Area Laws in Thermodynamically Gapped Spin Systems (2014)

Jaeyoon Cho

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): Jaeyoon Cho We consider general locally interacting arbitrary-dimensional lattice spin systems that are gapped for any system size. We show under reasonable conditions that nondegenerate ground states of such systems obey the entanglement area law. In so doing, we offer an intuitive picture on how a spectral ga... [Phys. Rev. Lett. 113, 197204] Published Fri Nov 07, 2014

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Full Control of the Spin-Wave Damping in a Magnetic Insulator Using Spin-Orbit Torque (2014)

A. Hamadeh, O. d’Allivy Kelly, C. Hahn, H. Meley, R. Bernard, A. H. Molpeceres, V. V. Naletov, M. Viret, A. Anane, V. Cros, S. O. Demokritov, J. L. Prieto, M. Muñoz, G. de Loubens, and O. Klein

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): A. Hamadeh, O. d’Allivy Kelly, C. Hahn, H. Meley, R. Bernard, A. H. Molpeceres, V. V. Naletov, M. Viret, A. Anane, V. Cros, S. O. Demokritov, J. L. Prieto, M. Muñoz, G. de Loubens, and O. Klein It is demonstrated that the threshold current for damping compensation can be reached in a 5 μm diameter YIG(20 nm)|Pt(7 nm) disk. The demonstration rests upon the measurement of the ferromagnetic resonance linewidth as a function of Idc using a magnetic resonance force microscope (MRFM). It is s... [Phys. Rev. Lett. 113, 197203] Published Fri Nov 07, 2014

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Magnetic Resonance Detection of Individual Proton Spins Using Quantum Reporters (2014)

A. O. Sushkov, I. Lovchinsky, N. Chisholm, R. L. Walsworth, H. Park, and M. D. Lukin

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-11-04

Beschreibung: Author(s): A. O. Sushkov, I. Lovchinsky, N. Chisholm, R. L. Walsworth, H. Park, and M. D. Lukin An NMR scheme based on nitrogen vacancies in diamond images the spins of individual protons. [Phys. Rev. Lett. 113, 197601] Published Mon Nov 03, 2014

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Structural analysis of the intermetallic surface compound CePt5/Pt(111) (2014)

Jeannette Kemmer, Christian Praetorius, Andreas Krönlein, Pin-Jui Hsu, Kai Fauth, and Matthias Bode

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-04

Beschreibung: Author(s): Jeannette Kemmer, Christian Praetorius, Andreas Krönlein, Pin-Jui Hsu, Kai Fauth, and Matthias Bode We report on a detailed low-energy electron diffraction (LEED) and low-temperature scanning tunneling microscopy (STM) study of the intermetallic surface compound CePt5 on Pt(111). Depending on the thickness we observe various diffraction patterns and superstructures. In the low-thickness regime a s... [Phys. Rev. B 90, 195401] Published Mon Nov 03, 2014

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Spin-Electricity Conversion Induced by Spin Injection into Topological Insulators (2014)

Y. Shiomi, K. Nomura, Y. Kajiwara, K. Eto, M. Novak, Kouji Segawa, Yoichi Ando, and E. Saitoh

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-11-04

Beschreibung: Author(s): Y. Shiomi, K. Nomura, Y. Kajiwara, K. Eto, M. Novak, Kouji Segawa, Yoichi Ando, and E. Saitoh We report successful spin injection into the surface states of topological insulators by using a spin pumping technique. By measuring the voltage that shows up across the samples as a result of spin pumping, we demonstrate that a spin-electricity conversion effect takes place in the surface states o... [Phys. Rev. Lett. 113, 196601] Published Mon Nov 03, 2014

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

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Determining whether metals nucleate homogeneously on graphite: A case study with copper (2014)

David Appy, Huaping Lei, Yong Han, Cai-Zhuang Wang, Michael C. Tringides, Dahai Shao, Emma J. Kwolek, J. W. Evans, and P. A. Thiel

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-06

Beschreibung: Author(s): David Appy, Huaping Lei, Yong Han, Cai-Zhuang Wang, Michael C. Tringides, Dahai Shao, Emma J. Kwolek, J. W. Evans, and P. A. Thiel We observe that Cu clusters grow on surface terraces of graphite as a result of physical vapor deposition in ultrahigh vacuum. We show that the observation is incompatible with a variety of models incorporating homogeneous nucleation and calculations of atomic-scale energetics. An alternative explan... [Phys. Rev. B 90, 195406] Published Wed Nov 05, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Current noise cross correlation mediated by Majorana bound states (2014)

Hai-Feng Lü, Hai-Zhou Lu, and Shun-Qing Shen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-06

Beschreibung: Author(s): Hai-Feng Lü, Hai-Zhou Lu, and Shun-Qing Shen We study the transport properties of a quantum dot-Majorana hybrid system, in which each of the paired Majorana bound states is connected to one quantum dot. With the help of the nonequilibrium Green's function method, we obtain an exact solution of the Green's functions and calculate the currents t... [Phys. Rev. B 90, 195404] Published Wed Nov 05, 2014

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Identifying the absolute orientation of a low-symmetry surface in real space (2014)

Stefan Kuhn, Markus Kittelmann, Yoshiaki Sugimoto, Masayuki Abe, Angelika Kühnle, and Philipp Rahe

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Stefan Kuhn, Markus Kittelmann, Yoshiaki Sugimoto, Masayuki Abe, Angelika Kühnle, and Philipp Rahe We present atomic-scale force interaction data acquired on an insulating low-symmetry substrate, namely the calcite(10.4) surface. A pronounced asymmetry of the imaged species is apparent along the vertical axis, which will be identified as a tilted band of purely attractive short-range interaction ... [Phys. Rev. B 90, 195405] Published Wed Nov 05, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Analysis of island shape evolution from diffuse x-ray scattering of organic thin films and implications for growth (2014)

C. Frank, R. Banerjee, M. Oettel, A. Gerlach, J. Novák, G. Santoro, and F. Schreiber

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-06

Beschreibung: Author(s): C. Frank, R. Banerjee, M. Oettel, A. Gerlach, J. Novák, G. Santoro, and F. Schreiber Understanding the growth of organic semiconducting molecules with shape anisotropy is of high relevance to the processing of optoelectronic devices. This work provides insight into the growth of thin films of the prototypical rodlike organic semiconductor diindenoperylene on a microscopic level by a... [Phys. Rev. B 90, 205401] Published Wed Nov 05, 2014

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Renormalization of nanoparticle polarizability in the vicinity of a graphene-covered interface (2014)

Jaime E. Santos, M. I. Vasilevskiy, N. M. R. Peres, G. Smirnov, and Yu. V. Bludov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-12

Beschreibung: Author(s): Jaime E. Santos, M. I. Vasilevskiy, N. M. R. Peres, G. Smirnov, and Yu. V. Bludov We study the electromagnetic properties of a metamaterial consisting of polarizable (nano)particles and a single graphene sheet placed at the interface between two dielectrics. We show that the particle's polarizability is renormalized because of the electromagnetic coupling to surface plasmons supp... [Phys. Rev. B 90, 235420] Published Thu Dec 11, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Asymmetric Frequency Conversion in Nonlinear Systems Driven by a Biharmonic Pump (2014)

Archana Kamal, Ananda Roy, John Clarke, and Michel H. Devoret

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-12-12

Beschreibung: Author(s): Archana Kamal, Ananda Roy, John Clarke, and Michel H. Devoret A novel mechanism of asymmetric frequency conversion is investigated in nonlinear dispersive devices driven parametrically with a biharmonic pump. When the relative phase between the first and second harmonics combined in a two-tone pump is appropriately tuned, nonreciprocal frequency conversion, ei... [Phys. Rev. Lett. 113, 247003] Published Thu Dec 11, 2014

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Rashba spin splitting of Shockley surface states on semi-infinite crystals (2014)

H. Ishida

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-16

Beschreibung: Author(s): H. Ishida We study the Rashba spin splitting of the L-gap surface state on the (111) surfaces of Au, Ag, and Cu, and that of the topologically protected surface state on Sb(111) by a first-principles calculation based on the embedded Green's function technique. By taking advantage of semi-infinite surface geo... [Phys. Rev. B 90, 235422] Published Mon Dec 15, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Integer and half-integer quantum Hall effect in silicene: Influence of an external electric field and impurities (2014)

Kh. Shakouri, P. Vasilopoulos, V. Vargiamidis, and F. M. Peeters

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-16

Beschreibung: Author(s): Kh. Shakouri, P. Vasilopoulos, V. Vargiamidis, and F. M. Peeters The influence of silicene's strong spin-orbit interaction and of an external electric field E z on the transport coefficients are investigated in the presence of a perpendicular magnetic field B. For finite E z the spin and valley degeneracy of the Landau levels is lifted and leads to additional plate... [Phys. Rev. B 90, 235423] Published Mon Dec 15, 2014

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Prediction of Near-Room-Temperature Quantum Anomalous Hall Effect on Honeycomb Materials (2014)

Shu-Chun Wu, Guangcun Shan, and Binghai Yan

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-12-16

Beschreibung: Author(s): Shu-Chun Wu, Guangcun Shan, and Binghai Yan Recently, the long-sough quantum anomalous Hall effect was realized in a magnetic topological insulator. However, the requirement of an extremely low temperature (approximately 30 mK) hinders realistic applications. Based on ab initio band structure calculations, we propose a quantum anomalous Hall ... [Phys. Rev. Lett. 113, 256401] Published Mon Dec 15, 2014

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Weak localization and spin-orbit interaction in side-gate field effect devices at the LaAlO_{3}/SrTiO_{3} interface (2014)

D. Stornaiuolo, S. Gariglio, A. Fête, M. Gabay, D. Li, D. Massarotti, and J.-M. Triscone

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-17

Beschreibung: Author(s): D. Stornaiuolo, S. Gariglio, A. Fête, M. Gabay, D. Li, D. Massarotti, and J.-M. Triscone Using field effect devices with side gates, we modulate the 2-dimensional electron gas hosted at the LaAlO 3 /SrTiO 3 interface to study the temperature and doping evolution of the magnetotransport. The analysis of the data reveals different transport regimes depending on the interplay between the diff... [Phys. Rev. B 90, 235426] Published Tue Dec 16, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Defect-induced negative magnetoresistance and surface state robustness in the topological insulator BiSbTeSe_{2} (2014)

Karan Banerjee, Jaesung Son, Praveen Deorani, Peng Ren, Lan Wang, and Hyunsoo Yang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-18

Beschreibung: Author(s): Karan Banerjee, Jaesung Son, Praveen Deorani, Peng Ren, Lan Wang, and Hyunsoo Yang Absence of backscattering and occurrence of weak antilocalization are two characteristic features of topological insulators. We find that the introduction of defects results in the appearance of a negative contribution to magnetoresistance (MR) in the topological insulator BiSbTeSe 2 at temperatures ... [Phys. Rev. B 90, 235427] Published Wed Dec 17, 2014

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Hot-electron noise properties of graphene-like systems (2014)

A. Rustagi and C. J. Stanton

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-18

Beschreibung: Author(s): A. Rustagi and C. J. Stanton We study the hot-electron noise properties of two-dimensional materials with a graphene-like energy dispersion under a strong applied electric field which drives the system far from equilibrium. Calculations are based on a Boltzmann–Green-function method within a two-relaxation-time approximation th... [Phys. Rev. B 90, 245424] Published Wed Dec 17, 2014

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Spin-flip Raman scattering of the resident electron in singly charged (In,Ga)As/GaAs quantum dot ensembles (2014)

J. Debus, V. F. Sapega, D. Dunker, D. R. Yakovlev, D. Reuter, A. D. Wieck, and M. Bayer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-02

Beschreibung: Author(s): J. Debus, V. F. Sapega, D. Dunker, D. R. Yakovlev, D. Reuter, A. D. Wieck, and M. Bayer Highly efficient spin-flip Raman scattering of the resident electron spin is found in singly charged (In,Ga)As/GaAs quantum dots. The applied magnetic field induces a symmetry reduction for the negatively charged exciton, which serves as intermediate scattering state, thus making the spin-flip Raman... [Phys. Rev. B 90, 235404] Published Mon Dec 01, 2014

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Interplay between electronic topology and crystal symmetry: Dislocation-line modes in topological band insulators (2014)

Robert-Jan Slager, Andrej Mesaros, Vladimir Juričić, and Jan Zaanen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-02

Beschreibung: Author(s): Robert-Jan Slager, Andrej Mesaros, Vladimir Juričić, and Jan Zaanen We elucidate the general rule governing the response of dislocation lines in three-dimensional topological band insulators. According to this K - b - t rule, the lattice topology, represented by dislocation lines oriented in direction t with Burgers vector b , combines with the electronic-band topology, ... [Phys. Rev. B 90, 241403] Published Mon Dec 01, 2014

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High intrinsic mobility and ultrafast carrier dynamics in multilayer metal-dichalcogenide MoS_{2} (2014)

Jared H. Strait, Parinita Nene, and Farhan Rana

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-02

Beschreibung: Author(s): Jared H. Strait, Parinita Nene, and Farhan Rana The ultimate limitations on carrier mobilities in metal dichalcogenides, and the dynamics associated with carrier relaxation, are unclear. We present measurements of the frequency-dependent conductivity of multilayer dichalcogenide MoS 2 by optical-pump terahertz-probe spectroscopy. We find mobilitie... [Phys. Rev. B 90, 245402] Published Mon Dec 01, 2014

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Stable structure of high In coverage on Si(111)-α-sqrt[3]×sqrt[3]-Au (2014)

Shih-Yu Wu, Chia-Hsiu Hsu, Wang-chi V. Yeh, Hsin Lin, Feng-Chuan Chuang, and Chien-Cheng Kuo

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-03

Beschreibung: Author(s): Shih-Yu Wu, Chia-Hsiu Hsu, Wang-chi V. Yeh, Hsin Lin, Feng-Chuan Chuang, and Chien-Cheng Kuo The structure of 0.8 ML In coverage on the Si(111)-√ 3 ×√ 3 -Au surface is investigated by scanning tunneling microscopy/spectroscopy and low energy electron diffraction. By depositing 1.2 ML In at room temperature followed by annealing at 500 ∘ C, the surface reveals the √ 7 ×√ 3 structure with 0.8 ML In c... [Phys. Rev. B 90, 235407] Published Tue Dec 02, 2014

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Dissipative preparation of the exciton and biexciton in self-assembled quantum dots on picosecond time scales (2014)

Per-Lennart Ardelt, Lukas Hanschke, Kevin A. Fischer, Kai Müller, Alexander Kleinkauf, Manuel Koller, Alexander Bechtold, Tobias Simmet, Jakob Wierzbowski, Hubert Riedl, Gerhard Abstreiter, and Jonathan J. Finley

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-03

Beschreibung: Author(s): Per-Lennart Ardelt, Lukas Hanschke, Kevin A. Fischer, Kai Müller, Alexander Kleinkauf, Manuel Koller, Alexander Bechtold, Tobias Simmet, Jakob Wierzbowski, Hubert Riedl, Gerhard Abstreiter, and Jonathan J. Finley Pulsed resonant fluorescence is used to probe ultrafast phonon-assisted exciton and biexciton preparation in individual self-assembled InGaAs quantum dots. By driving the system using large area (≥10π) near resonant optical pulses, we experimentally demonstrate how phonon-mediated dissipation within... [Phys. Rev. B 90, 241404] Published Tue Dec 02, 2014

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From weak to strong coupling of localized surface plasmons to guided modes in a luminescent slab (2014)

S. R. K. Rodriguez, Y. T. Chen, T. P. Steinbusch, M. A. Verschuuren, A. F. Koenderink, and J. Gómez Rivas

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-03

Beschreibung: Author(s): S. R. K. Rodriguez, Y. T. Chen, T. P. Steinbusch, M. A. Verschuuren, A. F. Koenderink, and J. Gómez Rivas We investigate a periodic array of aluminum nanoantennas embedded in a light-emitting slab waveguide. By varying the waveguide thickness, we demonstrate the transition from weak to strong coupling between localized surface plasmons in the nanoantennas and refractive index guided modes in the wavegui... [Phys. Rev. B 90, 235406] Published Tue Dec 02, 2014

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Transport characteristics of a single C_{60}-molecule junction revealed by multiple Andreev reflections (2014)

Ryoichi Hiraoka, Ryuichi Arafune, Noriyuki Tsukahara, Maki Kawai, and Noriaki Takagi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-03

Beschreibung: Author(s): Ryoichi Hiraoka, Ryuichi Arafune, Noriyuki Tsukahara, Maki Kawai, and Noriaki Takagi The I-V characteristics for atomic junction between two superconductors exhibit steps at voltages 2Δ/ n (with n=1, 2, 3, …) associated with multiple Andreev reflections (MAR). These features have been used in the past to determine the fundamental transport characteristics of atomic junctions. In this work, the authors present a development of the MAR technique by utilizing a superconducting Nb STM tip as one of the leads to study the transport properties of C 60 fullerene molecule. By analyzing the tunneling spectra and high-resolution molecular imaging, they were able to determine the number of conduction channels for C 6 0 as well as the origin and the dependence of the transmission coefficients on the contact geometry. [Phys. Rev. B 90, 241405] Published Tue Dec 02, 2014

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Circular-Polarization-Sensitive Metamaterial Based on Triple-Quantum-Dot Molecules (2014)

Panagiotis Kotetes, Pei-Qing Jin, Michael Marthaler, and Gerd Schön

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-12-03

Beschreibung: Author(s): Panagiotis Kotetes, Pei-Qing Jin, Michael Marthaler, and Gerd Schön We propose a new type of chiral metamaterial based on an ensemble of artificial molecules formed by three identical quantum dots in a triangular arrangement. A static magnetic field oriented perpendicular to the plane breaks mirror symmetry, rendering the molecules sensitive to the circular polariza... [Phys. Rev. Lett. 113, 236801] Published Tue Dec 02, 2014

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Electron dynamics in unoccupied states of spatially aligned 7-a graphene nanoribbons on Au(788) (2014)

N. F. Kleimeier, A. Timmer, L. Bignardi, H. Mönig, X. L. Feng, K. Müllen, L. F. Chi, H. Fuchs, and H. Zacharias

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-04

Beschreibung: Author(s): N. F. Kleimeier, A. Timmer, L. Bignardi, H. Mönig, X. L. Feng, K. Müllen, L. F. Chi, H. Fuchs, and H. Zacharias Bottom-up synthesized armchair graphene nanoribbons with a width of seven C = C bonds (7-aGNRs) have gained widespread interest due to their large band gap of about 2.8 eV and their atomically precise edge structures. Here, we report on the lifetime of excited states of spatially aligned 7-aGNRs gro... [Phys. Rev. B 90, 245408] Published Wed Dec 03, 2014

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Rashba splitting of graphene-covered Au(111) revealed by quasiparticle interference mapping (2014)

Philipp Leicht, Julia Tesch, Samuel Bouvron, Felix Blumenschein, Philipp Erler, Luca Gragnaniello, and Mikhail Fonin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-04

Beschreibung: Author(s): Philipp Leicht, Julia Tesch, Samuel Bouvron, Felix Blumenschein, Philipp Erler, Luca Gragnaniello, and Mikhail Fonin We report on low-temperature scanning tunneling spectroscopy measurements on epitaxial graphene flakes on Au(111). We show that using quasiparticle interference (QPI) mapping, we can discriminate between the electronic systems of graphene and Au(111). Beyond the scattering vectors, which can be ascr... [Phys. Rev. B 90, 241406] Published Wed Dec 03, 2014

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Anomalous electrical conduction in a monatomic Pb layer on Ge(111) (2014)

Shinichiro Hatta, Takashi Noma, Hiroshi Okuyama, and Tetsuya Aruga

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-04

Beschreibung: Author(s): Shinichiro Hatta, Takashi Noma, Hiroshi Okuyama, and Tetsuya Aruga We studied electrical transport through a Pb monolayer on Ge(111), which has a metallic surface state with a large Rashba spin splitting. The Pb monolayer was found to be metallic down to 9 K. The macroscopic sheet conductivity was 10.2±1.0mS/□ at 9 K, which is much higher than those of other metall... [Phys. Rev. B 90, 245407] Published Wed Dec 03, 2014

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Effective Theory of Floquet Topological Transitions (2014)

Arijit Kundu, H. A. Fertig, and Babak Seradjeh

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-12-04

Beschreibung: Author(s): Arijit Kundu, H. A. Fertig, and Babak Seradjeh We develop a theory of topological transitions in a Floquet topological insulator, using graphene irradiated by circularly polarized light as a concrete realization. We demonstrate that a hallmark signature of such transitions in a static system, i.e., metallic bulk transport with conductivity of or... [Phys. Rev. Lett. 113, 236803] Published Wed Dec 03, 2014

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Noncollinear Paramagnetism of a GaAs Two-Dimensional Hole System (2014)

L. A. Yeoh, A. Srinivasan, O. Klochan, R. Winkler, U. Zülicke, M. Y. Simmons, D. A. Ritchie, M. Pepper, and A. R. Hamilton

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-12-04

Beschreibung: Author(s): L. A. Yeoh, A. Srinivasan, O. Klochan, R. Winkler, U. Zülicke, M. Y. Simmons, D. A. Ritchie, M. Pepper, and A. R. Hamilton We have performed transport measurements in tilted magnetic fields in a two-dimensional hole system grown on the surface of a (311)A GaAs crystal. A striking asymmetry of Shubnikov–de Haas oscillations occurs upon reversing the in-plane component of the magnetic field along the low-symmetry [2̅ ... [Phys. Rev. Lett. 113, 236401] Published Wed Dec 03, 2014

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Fibonacci Anyons From Abelian Bilayer Quantum Hall States (2014)

Abolhassan Vaezi and Maissam Barkeshli

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In: Physical Review Letters

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Beschreibung: Author(s): Abolhassan Vaezi and Maissam Barkeshli The possibility of realizing non-Abelian statistics and utilizing it for topological quantum computation (TQC) has generated widespread interest. However, the non-Abelian statistics that can be realized in most accessible proposals is not powerful enough for universal TQC. In this Letter, we conside... [Phys. Rev. Lett. 113, 236804] Published Wed Dec 03, 2014

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Magnetism of Ho and Er Atoms on Close-Packed Metal Surfaces (2014)

F. Donati, A. Singha, S. Stepanow, C. Wäckerlin, J. Dreiser, P. Gambardella, S. Rusponi, and H. Brune

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-12-04

Beschreibung: Author(s): F. Donati, A. Singha, S. Stepanow, C. Wäckerlin, J. Dreiser, P. Gambardella, S. Rusponi, and H. Brune We investigated the magnetic properties of individual Ho atoms adsorbed on the (111) surface of Pt, which have been recently claimed to display single ion magnetic behavior. By combining x-ray absorption spectroscopy and magnetic dichroism measurements with ligand field multiplet calculations, we re... [Phys. Rev. Lett. 113, 237201] Published Wed Dec 03, 2014

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Quantum Spin Dimers from Chiral Dissipation in Cold-Atom Chains (2014)

Tomás Ramos, Hannes Pichler, Andrew J. Daley, and Peter Zoller

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): Tomás Ramos, Hannes Pichler, Andrew J. Daley, and Peter Zoller We consider the nonequilibrium dynamics of a driven dissipative spin chain with chiral coupling to a one-dimensional (1D) bosonic bath, and its atomic implementation with a two-species mixture of cold quantum gases. The reservoir is represented by a spin-orbit coupled 1D quasicondensate of atoms in ... [Phys. Rev. Lett. 113, 237203] Published Wed Dec 03, 2014

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Magnetic Damping: Domain Wall Dynamics versus Local Ferromagnetic Resonance (2014)

T. Weindler, H. G. Bauer, R. Islinger, B. Boehm, J.-Y. Chauleau, and C. H. Back

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In: Physical Review Letters

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Publikationsdatum: 2014-12-04

Beschreibung: Author(s): T. Weindler, H. G. Bauer, R. Islinger, B. Boehm, J.-Y. Chauleau, and C. H. Back Magnetic relaxation is one of the dominating features of magnetization dynamics. Depending on the magnetic structure and the experimental approach, different magnitudes of the damping parameter are reported even for a given material. In this study, we experimentally address this issue by accessing t... [Phys. Rev. Lett. 113, 237204] Published Wed Dec 03, 2014

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Protecting a Solid-State Spin from Decoherence Using Dressed Spin States (2014)

D. Andrew Golter, Thomas K. Baldwin, and Hailin Wang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-12-04

Beschreibung: Author(s): D. Andrew Golter, Thomas K. Baldwin, and Hailin Wang We report experimental studies of dressing an electron spin in diamond with resonant and continuous microwave fields to protect the electron spin from magnetic fluctuations induced by the nuclear spin bath. We use optical coherent population trapping (CPT) to probe the energy level structure, optica... [Phys. Rev. Lett. 113, 237601] Published Wed Dec 03, 2014

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Are Hydrogen-Bonded Charge Transfer Crystals Room Temperature Ferroelectrics? (2014)

Gabriele D’Avino and Matthieu J. Verstraete

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): Gabriele D’Avino and Matthieu J. Verstraete We present a theoretical investigation of the anomalous ferroelectricity of mixed-stack charge transfer molecular crystals, based on the Peierls-Hubbard model, and first-principles calculations for its parametrization. This approach is first validated by reproducing the temperature-induced transitio... [Phys. Rev. Lett. 113, 237602] Published Wed Dec 03, 2014

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Quantum Selection of Order in an XXZ Antiferromagnet on a Kagome Lattice (2014)

A. L. Chernyshev and M. E. Zhitomirsky

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): A. L. Chernyshev and M. E. Zhitomirsky Selection of the ground state of the kagome-lattice XXZ antiferromagnet by quantum fluctuations is investigated by combining nonlinear spin-wave and real-space perturbation theories. The two methods unanimously favor q =0 over √ 3 ×√ 3 magnetic order in a wide range of the anisotropy parameter 0≤Δ≲0.72.... [Phys. Rev. Lett. 113, 237202] Published Wed Dec 03, 2014

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Local electrical tuning of the nonlocal signals in a Cooper pair splitter (2014)

G. Fülöp, S. d'Hollosy, A. Baumgartner, P. Makk, V. A. Guzenko, M. H. Madsen, J. Nygård, C. Schönenberger, and S. Csonka

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-05

Beschreibung: Author(s): G. Fülöp, S. d'Hollosy, A. Baumgartner, P. Makk, V. A. Guzenko, M. H. Madsen, J. Nygård, C. Schönenberger, and S. Csonka A Cooper pair splitter consists of a central superconducting contact, S, from which electrons are injected into two parallel, spatially separated quantum dots (QDs). This geometry as well as electron interactions can lead to correlated electrical currents due to the spatial separation of spin-single... [Phys. Rev. B 90, 235412] Published Thu Dec 04, 2014

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Optically induced Aharonov-Bohm effect in mesoscopic rings (2014)

H. Sigurdsson, O. V. Kibis, and I. A. Shelykh

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-05

Beschreibung: Author(s): H. Sigurdsson, O. V. Kibis, and I. A. Shelykh We show theoretically that strong electron coupling to circularly polarized photons in non-singly-connected nanostructures results in the appearance of an artificial gauge field that changes the electron phase. The effect arises from the breaking of time-reversal symmetry and is analogous to the wel... [Phys. Rev. B 90, 235413] Published Thu Dec 04, 2014

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Spin-resolved optical conductivity of two-dimensional group-VIB transition-metal dichalcogenides (2014)

Marco Gibertini, Francesco M. D. Pellegrino, Nicola Marzari, and Marco Polini

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Marco Gibertini, Francesco M. D. Pellegrino, Nicola Marzari, and Marco Polini We present an ab initio study of the spin-resolved optical conductivity of two-dimensional (2D) group-VIB transition-metal dichalcogenides (TMDs). We carry out fully relativistic density-functional-theory calculations combined with maximally localized Wannier functions to obtain band manifolds at ex... [Phys. Rev. B 90, 245411] Published Thu Dec 04, 2014

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Spin-Orbit Fluctuations in Frustrated Heavy-Fermion Metal LiV_{2}O_{4} (2014)

K. Tomiyasu, K. Iwasa, H. Ueda, S. Niitaka, H. Takagi, S. Ohira-Kawamura, T. Kikuchi, Y. Inamura, K. Nakajima, and K. Yamada

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): K. Tomiyasu, K. Iwasa, H. Ueda, S. Niitaka, H. Takagi, S. Ohira-Kawamura, T. Kikuchi, Y. Inamura, K. Nakajima, and K. Yamada Spin fluctuations were studied over a wide momentum (ℏQ) and energy (E) space in the frustrated d-electron heavy-fermion metal LiV 2 O 4 by time-of-flight inelastic neutron scattering. We observed the overall Q−E evolutions near the characteristic Q=0.6 Å -1 peak and found another weak broad magnetic ... [Phys. Rev. Lett. 113, 236402] Published Thu Dec 04, 2014

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Electrical Spin Injection into High Mobility 2D Systems (2014)

M. Oltscher, M. Ciorga, M. Utz, D. Schuh, D. Bougeard, and D. Weiss

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): M. Oltscher, M. Ciorga, M. Utz, D. Schuh, D. Bougeard, and D. Weiss The injection of spins into a high-mobility two-dimensional electron gas is unexpectedly efficient, suggesting that new theories may be needed to describe spin transport in such systems. [Phys. Rev. Lett. 113, 236602] Published Thu Dec 04, 2014

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Boron aggregation in the ground states of boron-carbon fullerenes (2014)

Stephan Mohr, Pascal Pochet, Maximilian Amsler, Bastian Schaefer, Ali Sadeghi, Luigi Genovese, and Stefan Goedecker

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-11

Beschreibung: Author(s): Stephan Mohr, Pascal Pochet, Maximilian Amsler, Bastian Schaefer, Ali Sadeghi, Luigi Genovese, and Stefan Goedecker We present unexpected structural motifs for boron-carbon nanocages of the stoichiometries B12C48 and B12C50, based on first-principles calculations. These configurations are distinct from those proposed so far because the boron atoms are not isolated and distributed over the entire surface of the ca... [Phys. Rev. B 89, 041404] Published Fri Jan 10, 2014

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Fermi-Liquid Computation of the Phase Diagram of High-Tc Cuprate Superconductors with an Orbital Antiferromagnetic Pseudogap (2014)

R. B. Laughlin

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-11

Beschreibung: Author(s): R. B. Laughlin A 4-parameter Fermi-liquid calculation of the high-Tc cuprate phase diagram is reported. Simultaneously accounted for are the special doping densities of 5% and 16%, the d-wave functional form of the (orbital antiferromagnetic) pseudogap, the measured Tc, superconducting gap, pseudogap and superflui... [Phys. Rev. Lett. 112, 017004] Published Fri Jan 10, 2014

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Spin and Orbital Contributions to Magnetically Ordered Moments in 5d Layered Perovskite Sr2IrO4 (2014)

S. Fujiyama, H. Ohsumi, K. Ohashi, D. Hirai, B. J. Kim, T. Arima, M. Takata, and H. Takagi

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-11

Beschreibung: Author(s): S. Fujiyama, H. Ohsumi, K. Ohashi, D. Hirai, B. J. Kim, T. Arima, M. Takata, and H. Takagi The ratio of orbital (L) and spin (S) contributions to the magnetically ordered moments of a 5d transition metal oxide, Sr2IrO4 was evaluated by nonresonant magnetic x-ray diffraction. We applied an improved experimental setting that minimized the experimental error, in which we varied only the line... [Phys. Rev. Lett. 112, 016405] Published Fri Jan 10, 2014

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Magnetic Field Induced Transition in Vanadium Spinels (2014)

E. D. Mun, Gia-Wei Chern, V. Pardo, F. Rivadulla, R. Sinclair, H. D. Zhou, V. S. Zapf, and C. D. Batista

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-11

Beschreibung: Author(s): E. D. Mun, Gia-Wei Chern, V. Pardo, F. Rivadulla, R. Sinclair, H. D. Zhou, V. S. Zapf, and C. D. Batista We study vanadium spinels AV2O4(A=Cd,Mg) in pulsed magnetic fields up to 65 T. A jump in magnetization at μ0H≈40 T is observed in the single-crystal MgV2O4, indicating a field induced quantum phase transition between two distinct magnetic orders. In the multiferroic CdV2O4, the field induced transi... [Phys. Rev. Lett. 112, 017207] Published Fri Jan 10, 2014

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Anomalous Hall Effect Arising from Noncollinear Antiferromagnetism (2014)

Hua Chen, Qian Niu, and A. H. Mac; Donald

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): Hua Chen, Qian Niu, and A. H. MacDonald As established in the very early work of Edwin Hall, ferromagnetic conductors have an anomalous Hall conductivity contribution that cannot be attributed to Lorentz forces and therefore survives in the absence of a magnetic field. These anomalous Hall conductivities are normally assumed to be proport... [Phys. Rev. Lett. 112, 017205] Published Fri Jan 10, 2014

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Tunnel junction of helical edge states: Determining and controlling spin-preserving and spin-flipping processes through transconductance (2014)

Pietro Sternativo and Fabrizio Dolcini

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-15

Beschreibung: Author(s): Pietro Sternativo and Fabrizio Dolcini When a constriction is realized in a 2D quantum spin Hall system, electron tunneling between helical edge states occurs via two types of channels allowed by time-reversal symmetry, namely spin-preserving (p) and spin-flipping (f) tunneling processes. Determining and controlling the effects of these ... [Phys. Rev. B 89, 035415] Published Tue Jan 14, 2014

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Spectroscopy of a topological phase (2014)

Michael Kamfor, Sébastien Dusuel, Julien Vidal, and Kai Phillip Schmidt

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Michael Kamfor, Sébastien Dusuel, Julien Vidal, and Kai Phillip Schmidt Dynamical correlation functions of the toric code in a uniform magnetic field are studied inside the topological phase, in the small-field limit. Such an experimentally measurable quantity displays rich field-dependent features that can be understood via the interplay of the kinetics and the interac... [Phys. Rev. B 89, 045411] Published Tue Jan 14, 2014

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Excitonic recombinations in h-BN: From bulk to exfoliated layers (2014)

A. Pierret, J. Loayza, B. Berini, A. Betz, B. Plaçais, F. Ducastelle, J. Barjon, and A. Loiseau

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-15

Beschreibung: Author(s): A. Pierret, J. Loayza, B. Berini, A. Betz, B. Plaçais, F. Ducastelle, J. Barjon, and A. Loiseau Hexagonal boron nitride (h-BN) and graphite are structurally similar but with very different properties. Their combination in graphene-based devices is now of intense research focus, and it becomes particularly important to evaluate the role played by crystalline defects on their properties. In this... [Phys. Rev. B 89, 035414] Published Tue Jan 14, 2014

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Titration of submonolayer Au growth on Si(111) (2014)

J. Kautz, M. W. Copel, M. S. Gordon, R. M. Tromp, and S. J. van der Molen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-15

Beschreibung: Author(s): J. Kautz, M. W. Copel, M. S. Gordon, R. M. Tromp, and S. J. van der Molen We study and analyze the growth of submonolayers of Au on Si(111) by a complementary set of surface techniques. Specifically, we focus on the 5×2 and the α3×3 structures. We determine the gold coverage of these structures as a function of temperature by means of low energy electron diffraction (LEED... [Phys. Rev. B 89, 035416] Published Tue Jan 14, 2014

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Absence of hyperfine effects in 13C-graphene spin-valve devices (2014)

M. Wojtaszek, I. J. Vera-Marun, E. Whiteway, M. Hilke, and B. J. van Wees

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): M. Wojtaszek, I. J. Vera-Marun, E. Whiteway, M. Hilke, and B. J. van Wees The carbon isotope 13C, in contrast to 12C, possesses a nuclear magnetic moment and can induce electron spin dephasing in graphene. This effect is usually neglected due to the low abundance of 13C in natural carbon allotropes (∼1%). Chemical vapor deposition (CVD) allows for artificial synthesis of ... [Phys. Rev. B 89, 035417] Published Tue Jan 14, 2014

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Topologically Protected Conduction State at Carbon Foam Surfaces: An Ab initio Study (2014)

Zhen Zhu, Zacharias G. Fthenakis, Jie Guan, and David Tománek

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): Zhen Zhu, Zacharias G. Fthenakis, Jie Guan, and David Tománek We report results of ab initio electronic structure and quantum conductance calculations indicating the emergence of conduction at the surface of semiconducting carbon foams. The occurrence of new conduction states is intimately linked to the topology of the surface and not limited to foams of eleme... [Phys. Rev. Lett. 112, 026803] Published Tue Jan 14, 2014

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Coherent Operations and Screening in Multielectron Spin Qubits (2014)

A. P. Higginbotham, F. Kuemmeth, M. P. Hanson, A. C. Gossard, and C. M. Marcus

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-15

Beschreibung: Author(s): A. P. Higginbotham, F. Kuemmeth, M. P. Hanson, A. C. Gossard, and C. M. Marcus Multielectron spin qubits are demonstrated, and performance examined by comparing coherent exchange oscillations in coupled single-electron and multielectron quantum dots, measured in the same device. Fast (〉1 GHz) exchange oscillations with a quality factor Q∼15 are found for the multielectron ... [Phys. Rev. Lett. 112, 026801] Published Tue Jan 14, 2014

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From Dia- to Paramagnetic Orbital Susceptibility of Massless Fermions (2014)

A. Raoux, M. Morigi, J.-N. Fuchs, F. Piéchon, and G. Montambaux

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): A. Raoux, M. Morigi, J.-N. Fuchs, F. Piéchon, and G. Montambaux We study the orbital susceptibility of multiband systems with a pair of Dirac points interpolating between honeycomb and dice lattices. Despite having the same zero-field energy spectrum, these different systems exhibit spectacular differences in their orbital magnetic response, ranging from dia- to... [Phys. Rev. Lett. 112, 026402] Published Tue Jan 14, 2014

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Nonequilibrium distribution functions for quantum transport: Universality and approximation for the steady state regime (2014)

H. Ness

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-14

Beschreibung: Author(s): H. Ness We derive a general expression for the electron nonequilibrium (NE) distribution function in the context of steady state quantum transport through a two-terminal nanodevice with interactions. The central idea for the use of NE distributions for open quantum systems is that both the NE and many-body ... [Phys. Rev. B 89, 045409] Published Mon Jan 13, 2014

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Electron-photon scattering mediated by localized plasmons: A quantitative analysis by eigen-response theory (2014)

Kin Hung Fung, Anil Kumar, and Nicholas X. Fang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-14

Beschreibung: Author(s): Kin Hung Fung, Anil Kumar, and Nicholas X. Fang We show that the scattering interaction between a high energy electron and a photon can be strongly enhanced by different types of localized plasmons in a nontrivial way. The scattering interaction is predicted by an eigen-response theory, numerically verified by finite-difference-time-domain simula... [Phys. Rev. B 89, 045408] Published Mon Jan 13, 2014

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Order, Criticality, and Excitations in the Extended Falicov-Kimball Model (2014)

S. Ejima, T. Kaneko, Y. Ohta, and H. Fehske

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-14

Beschreibung: Author(s): S. Ejima, T. Kaneko, Y. Ohta, and H. Fehske Using exact numerical techniques, we investigate the nature of excitonic (electron-hole) bound states and the development of exciton coherence in the one-dimensional half-filled extended Falicov-Kimball model. The ground-state phase diagram of the model exhibits, besides band-insulator and staggered... [Phys. Rev. Lett. 112, 026401] Published Mon Jan 13, 2014

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Andreev reflection in monolayer MoS2 (2014)

Leyla Majidi, Habib Rostami, and Reza Asgari

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-16

Beschreibung: Author(s): Leyla Majidi, Habib Rostami, and Reza Asgari Andreev reflection in a monolayer molybdenum disulfide superconducting-normal (S/N) hybrid junction is investigated. We find, by using a modified Dirac Hamiltonian and the scattering formalism, that the perfect Andreev reflection happens at normal incidence with p-doped S and N regions. The probabil... [Phys. Rev. B 89, 045413] Published Wed Jan 15, 2014

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Effect of Electron-Phonon Interactions on Orbital Fluctuations in Iron-Based Superconductors (2014)

Yusuke Nomura, Kazuma Nakamura, and Ryotaro Arita

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-16

Beschreibung: Author(s): Yusuke Nomura, Kazuma Nakamura, and Ryotaro Arita To investigate the possibility of whether electron-phonon coupling can enhance orbital fluctuations in iron-based superconductors, we develop an ab initio method to construct the effective low-energy models including the phonon-related terms. With the derived effective electron-phonon interactions a... [Phys. Rev. Lett. 112, 027002] Published Wed Jan 15, 2014

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Resonant X-Ray Scattering and the jeff=1/2 Electronic Ground State in Iridate Perovskites (2014)

M. Moretti Sala, S. Boseggia, D. F. McMorrow, and G. Monaco

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-16

Beschreibung: Author(s): M. Moretti Sala, S. Boseggia, D. F. McMorrow, and G. Monaco The resonant x-ray scattering (magnetic elastic, RXMS, and inelastic, RIXS) of Ir4+ at the L2,3 edges relevant to spin-orbit Mott insulators An+1IrnO3n+1 (A=Sr, Ba, etc.) are calculated using a single-ion model which treats the spin-orbit and tetragonal crystal-field terms on an equal footing. Both ... [Phys. Rev. Lett. 112, 026403] Published Wed Jan 15, 2014

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Observation of Edge Transport in the Disordered Regime of Topologically Insulating InAs/GaSb Quantum Wells (2014)

Ivan Knez, Charles T. Rettner, See-Hun Yang, Stuart S. P. Parkin, Lingjie Du, Rui-Rui Du, and Gerard Sullivan

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-16

Beschreibung: Author(s): Ivan Knez, Charles T. Rettner, See-Hun Yang, Stuart S. P. Parkin, Lingjie Du, Rui-Rui Du, and Gerard Sullivan We observe edge transport in the topologically insulating InAs/GaSb system in the disordered regime. Using asymmetric current paths we show that conduction occurs exclusively along the device edge, exhibiting a large Hall signal at zero magnetic fields, while for symmetric current paths, the conduct... [Phys. Rev. Lett. 112, 026602] Published Wed Jan 15, 2014

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Molecular Quantum Magnetism in LiZn2Mo3O8 (2014)

M. Mourigal, W. T. Fuhrman, J. P. Sheckelton, A. Wartelle, J. A. Rodriguez-Rivera, D. L. Abernathy, T. M. McQueen, and C. L. Broholm

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-16

Beschreibung: Author(s): M. Mourigal, W. T. Fuhrman, J. P. Sheckelton, A. Wartelle, J. A. Rodriguez-Rivera, D. L. Abernathy, T. M. McQueen, and C. L. Broholm Inelastic neutron scattering at low temperatures T≤30 K from a powder of LiZn2Mo3O8 demonstrates this triangular-lattice antiferromagnet hosts collective magnetic excitations from spin-1/2 Mo3O13 molecules. Apparently gapless (Δ〈0.2 meV) and extending at least up to 2.5 meV, the low-energy magn... [Phys. Rev. Lett. 112, 027202] Published Wed Jan 15, 2014

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Counter-propagating Edge Modes and Topological Phases of a Kicked Quantum Hall System (2014)

Mahmoud Lababidi, Indubala I. Satija, and Erhai Zhao

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-16

Beschreibung: Author(s): Mahmoud Lababidi, Indubala I. Satija, and Erhai Zhao A periodically driven quantum Hall system in a fixed magnetic field is found to exhibit a series of phases featuring anomalous edge modes with the “wrong” chirality. This leads to pairs of counter-propagating chiral edge modes at each edge, in sharp contrast to stationary quantum Hall systems. We sh... [Phys. Rev. Lett. 112, 026805] Published Wed Jan 15, 2014

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Cubic Mn2Ga Thin Films: Crossing the Spin Gap with Ruthenium (2014)

H. Kurt, K. Rode, P. Stamenov, M. Venkatesan, Y.-C. Lau, E. Fonda, and J. M. D. Coey

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-16

Beschreibung: Author(s): H. Kurt, K. Rode, P. Stamenov, M. Venkatesan, Y.-C. Lau, E. Fonda, and J. M. D. Coey Cubic Mn2Ga films with the half-Heusler C1b structure are grown on V (001) epitaxial films. The phase is a soft ferrimagnet, with Curie temperature TC = 225 K and magnetization Ms=280 kA m−1, equivalent to 1.65μB per formula. Adding ruthenium leads to an increase of TC up to 550 K in cubic Mn2RuxGa... [Phys. Rev. Lett. 112, 027201] Published Wed Jan 15, 2014

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Nature of Quasielectrons and the Continuum of Neutral Bulk Excitations in Laughlin Quantum Hall Fluids (2014)

Bo Yang and F. D. M. Haldane

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-17

Beschreibung: Author(s): Bo Yang and F. D. M. Haldane We construct model wave functions for a family of single-quasielectron states supported by the ν=1/3 fractional quantum Hall fluid. The charge e*=e/3 quasielectron state is identified as a composite of a charge-2e* quasiparticle and a −e* quasihole, orbiting around their common center of charge with... [Phys. Rev. Lett. 112, 026804] Published Thu Jan 16, 2014

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Charge mobility and current-induced spin polarization in nonlinear surface transport of a topological insulator with hexagonal warping (2014)

C. M. Wang and X. L. Lei

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-18

Beschreibung: Author(s): C. M. Wang and X. L. Lei The nonlinear charge mobility and current-induced spin polarization in the nonlinear surface transport of a topological insulator with a hexagonal deforming band are investigated in the presence of a strong dc electric field by means of a balance-equation approach for a single energy band. The nonli... [Phys. Rev. B 89, 045415] Published Fri Jan 17, 2014

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Nonlocal spectroscopy of Andreev bound states (2014)

J. Schindele, A. Baumgartner, R. Maurand, M. Weiss, and C. Schönenberger

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-23

Beschreibung: Author(s): J. Schindele, A. Baumgartner, R. Maurand, M. Weiss, and C. Schönenberger We experimentally investigate Andreev bound states (ABSs) in a carbon nanotube quantum dot (QD) connected to a superconducting Nb lead (S). A weakly coupled normal metal contact acts as a tunnel probe that measures the energy dispersion of the ABSs. Moreover, we study the response of the ABS to nonl... [Phys. Rev. B 89, 045422] Published Wed Jan 22, 2014

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Scale Invariance and Universality in a Cold Gas of Indirect Excitons (2014)

S. V. Andreev, A. A. Varlamov, and A. V. Kavokin

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-24

Beschreibung: Author(s): S. V. Andreev, A. A. Varlamov, and A. V. Kavokin We address, theoretically, the puzzling similarity observed in the thermodynamic behavior of independent clouds of cold dipolar excitons in coupled semiconductor quantum wells. We argue that the condensation of self-trapped exciton gas starts at the same critical temperature in all traps due to the ... [Phys. Rev. Lett. 112, 036401] Published Thu Jan 23, 2014

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Edge Theories in Projected Entangled Pair State Models (2014)

S. Yang, L. Lehman, D. Poilblanc, K. Van Acoleyen, F. Verstraete, J. I. Cirac, and N. Schuch

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-24

Beschreibung: Author(s): S. Yang, L. Lehman, D. Poilblanc, K. Van Acoleyen, F. Verstraete, J. I. Cirac, and N. Schuch We analyze the low energy excitations of spin lattice systems in two dimensions at zero temperature within the framework of projected entangled pair state models. Perturbations in the bulk give rise to physical excitations located at the edge. We identify the corresponding degrees of freedom, give a... [Phys. Rev. Lett. 112, 036402] Published Thu Jan 23, 2014

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Selective Equal-Spin Andreev Reflections Induced by Majorana Fermions (2014)

James J. He, T. K. Ng, Patrick A. Lee, and K. T. Law

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2014-01-24

Beschreibung: Author(s): James J. He, T. K. Ng, Patrick A. Lee, and K. T. Law In this work, we find that Majorana fermions induce selective equal spin Andreev reflections (SESARs), in which incoming electrons with certain spin polarization in the lead are reflected as counterpropagating holes with the same spin. The spin polarization direction of the electrons of this Andreev... [Phys. Rev. Lett. 112, 037001] Published Thu Jan 23, 2014

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Tunable polarization in a beam splitter based on two-dimensional topological insulators (2014)

D. G. Rothe and E. M. Hankiewicz

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-15

Beschreibung: Author(s): D. G. Rothe and E. M. Hankiewicz The typical bulk model describing 2D topological insulators (TI) consists of two types of spin-orbit terms, the so-called Dirac term, which induces out-of-plane spin polarization, and the Rashba term, which induces in-plane spin polarization. We show that for some parameters of the Fermi energy, the... [Phys. Rev. B 89, 035418] Published Tue Jan 14, 2014

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Transport across two interacting quantum dots: Bulk Kondo, Kondo box, and molecular regimes (2014)

L. C. Ribeiro, I. J. Hamad, G. Chiappe, and E. V. Anda

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-15

Beschreibung: Author(s): L. C. Ribeiro, I. J. Hamad, G. Chiappe, and E. V. Anda We analyze the transport properties of a double quantum dot device with both dots coupled to perfect conducting leads and to a finite chain of N noninteracting sites connecting both of them. The interdot chain strongly influences the transport across the system and the local density of states of the... [Phys. Rev. B 89, 045412] Published Tue Jan 14, 2014

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Microwave-induced zero-resistance states and second-harmonic generation in an ultraclean two-dimensional electron gas (2014)

S. A. Mikhailov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-15

Beschreibung: Author(s): S. A. Mikhailov The microwave-induced resistance oscillations and “zero-resistance” states were discovered in ultraclean two-dimensional electron systems in 2001–2003 and have attracted great interest from researchers. A comprehensive theory of these phenomena was developed in 2011: It was shown that all experiment... [Phys. Rev. B 89, 045410] Published Tue Jan 14, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Thema: Physik

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Possibility for exciton Bose-Einstein condensation in carbon nanotubes (2014)

I. V. Bondarev and A. V. Meliksetyan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-18

Beschreibung: Author(s): I. V. Bondarev and A. V. Meliksetyan We demonstrate a possibility for exciton Bose-Einstein condensation in individual small-diameter (∼1--2 nm) semiconducting carbon nanotubes. The effect occurs under the exciton-interband-plasmon coupling controlled by an external electrostatic field applied perpendicular to the nanotube axis. It req... [Phys. Rev. B 89, 045414] Published Fri Jan 17, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Self-quenching of nuclear spin dynamics in the central spin problem (2014)

Arne Brataas and Emmanuel I. Rashba

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-22

Beschreibung: Author(s): Arne Brataas and Emmanuel I. Rashba We consider, in the framework of the central spin s=1/2 model, driven dynamics of two electrons in a double quantum dot subject to hyperfine interaction with nuclear spins and spin-orbit coupling. The nuclear subsystem dynamically evolves in response to Landau-Zener singlet-triplet transitions of th... [Phys. Rev. B 89, 035423] Published Tue Jan 21, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Kondo effect of a cobalt adatom on a zigzag graphene nanoribbon (2014)

Damian Krychowski, Jakub Kaczkowski, and Stanislaw Lipinski

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-22

Beschreibung: Author(s): Damian Krychowski, Jakub Kaczkowski, and Stanislaw Lipinski Based on ab initio calculations we discuss the Kondo effect due to a Co adatom on a graphene zigzag nanoribbon. A Co atom located at a hollow site behaves as a spin S=1/2 impurity with dxz and dyz orbitals contributing to the magnetic moment. Dynamical correlations are analyzed with the use of compl... [Phys. Rev. B 89, 035424] Published Tue Jan 21, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Optical properties of Bernal-stacked bilayer graphene: A theoretical study (2014)

Faris Kadi and Ermin Malic

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-22

Beschreibung: Author(s): Faris Kadi and Ermin Malic We present a microscopic study of optical properties of Bernal-stacked bilayer graphene. Our focus lies on the absorption spectrum explicitly including the impact of fully momentum-dependent optical and Coulomb matrix elements. Our approach is based on the density matrix formalism combined with tigh... [Phys. Rev. B 89, 045419] Published Tue Jan 21, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Feshbach-type resonances for two-particle scattering in graphene (2014)

C. Gaul, F. Domínguez-Adame, F. Sols, and I. Zapata

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-22

Beschreibung: Author(s): C. Gaul, F. Domínguez-Adame, F. Sols, and I. Zapata Two-particle scattering in graphene is a multichannel problem, where the energies of the identical or opposite-helicity channels lie in disjoint energy segments. Due to the absence of Galilean invariance, these segments depend on the total momentum Q. The dispersion relations for the two opposite-he... [Phys. Rev. B 89, 045420] Published Tue Jan 21, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Charge carrier relaxation processes in TbAs nanoinclusions in GaAs measured by optical-pump THz-probe transient absorption spectroscopy (2014)

Laura R. Vanderhoef, Abul K. Azad, Cory C. Bomberger, Dibakar Roy Chowdhury, D. Bruce Chase, Antoinette J. Taylor, Joshua M. O. Zide, and Matthew F. Doty

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-22

Beschreibung: Author(s): Laura R. Vanderhoef, Abul K. Azad, Cory C. Bomberger, Dibakar Roy Chowdhury, D. Bruce Chase, Antoinette J. Taylor, Joshua M. O. Zide, and Matthew F. Doty Rare-earth materials epitaxially codeposited with III-V semiconductors form small, spherical rare-earth-monopnictide nanoparticles embedded within the III-V host. The small size of these particles (approximately 1.5 nm diameter) suggests that interesting electronic properties might emerge as a resul... [Phys. Rev. B 89, 045418] Published Tue Jan 21, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Comparison of van der Waals corrected and sparse-matter density functionals for the metal-free phthalocyanine/gold interface (2014)

Johann Lüder, Biplab Sanyal, Olle Eriksson, Carla Puglia, and Barbara Brena

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-22

Beschreibung: Author(s): Johann Lüder, Biplab Sanyal, Olle Eriksson, Carla Puglia, and Barbara Brena In this paper, we report a systematic study on the effect of different van der Waals dispersion correction methods in conjunction with Density Functional Theory on the adsorption characteristics of a monolayer of metal-free phthalocyanine on Au(111). The chosen dispersion corrections were DFT-D2, th... [Phys. Rev. B 89, 045416] Published Tue Jan 21, 2014

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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