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Direct surface charging and alkali-metal doping for tuning the interlayer magnetic order in planar nanostructures (2015)

Tamene R. Dasa and Valeri S. Stepanyuk

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Tamene R. Dasa and Valeri S. Stepanyuk The continuous reduction of magnetic units to ultrasmall length scales inspires efforts to look for a suitable means of controlling magnetic states. In this study, we show two surface charge alteration techniques for tuning the interlayer exchange coupling of ferromagnetic layers separated by parama… [Phys. Rev. B 92, 075412] Published Mon Aug 10, 2015

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

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Thema: Physik

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TiS_{3} nanoribbons: Width-independent band gap and strain-tunable electronic properties (2015)

Jun Kang, Hasan Sahin, H. Duygu Ozaydin, R. Tugrul Senger, and François M. Peeters

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Jun Kang, Hasan Sahin, H. Duygu Ozaydin, R. Tugrul Senger, and François M. Peeters The electronic properties, carrier mobility, and strain response of TiS 3 nanoribbons ( TiS 3 NRs) are investigated by first-principles calculations. We found that the electronic properties of TiS 3 NRs strongly depend on the edge type ( a or b ). All a - TiS 3 NRs are metallic with a magnetic ground state, … [Phys. Rev. B 92, 075413] Published Mon Aug 10, 2015

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

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Real-space imaging of nanotip plasmons using electron energy loss spectroscopy (2015)

Benjamin Schröder, Thorsten Weber, Sergey V. Yalunin, Thomas Kiel, Christian Matyssek, Murat Sivis, Sascha Schäfer, Felix von Cube, Stephan Irsen, Kurt Busch, Claus Ropers, and Stefan Linden

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Benjamin Schröder, Thorsten Weber, Sergey V. Yalunin, Thomas Kiel, Christian Matyssek, Murat Sivis, Sascha Schäfer, Felix von Cube, Stephan Irsen, Kurt Busch, Claus Ropers, and Stefan Linden We report the spatial mapping of surface plasmons on conical gold nanotips by electron energy loss spectroscopy. We observe standing-wave patterns resulting from reflections of the fundamental surface-plasmon mode at the nanotip apex. The experimental results are in very good agreement with numerica… [Phys. Rev. B 92, 085411] Published Mon Aug 10, 2015

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

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OH-terminated two-dimensional transition metal carbides and nitrides as ultralow work function materials (2015)

Mohammad Khazaei, Masao Arai, Taizo Sasaki, Ahmad Ranjbar, Yunye Liang, and Seiji Yunoki

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Mohammad Khazaei, Masao Arai, Taizo Sasaki, Ahmad Ranjbar, Yunye Liang, and Seiji Yunoki MXenes are a set of two-dimensional transition metal carbides and nitrides that offer many potential applications in energy storage and electronic devices. As an important parameter to design new electronic devices, we investigate the work functions of bare MXenes and their functionalized ones with … [Phys. Rev. B 92, 075411] Published Mon Aug 10, 2015

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

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Phonon-limited carrier mobility and resistivity from carbon nanotubes to graphene (2015)

Jing Li, Henrique Pereira Coutada Miranda, Yann-Michel Niquet, Luigi Genovese, Ivan Duchemin, Ludger Wirtz, and Christophe Delerue

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): Jing Li, Henrique Pereira Coutada Miranda, Yann-Michel Niquet, Luigi Genovese, Ivan Duchemin, Ludger Wirtz, and Christophe Delerue Under which conditions do the electrical transport properties of one-dimensional (1D) carbon nanotubes (CNTs) and 2D graphene become equivalent? We have performed atomistic calculations of the phonon-limited electrical mobility in graphene and in a wide range of CNTs of different types to address th… [Phys. Rev. B 92, 075414] Published Tue Aug 11, 2015

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

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Helicoidal graphene nanoribbons: Chiraltronics (2015)

Victor Atanasov and Avadh Saxena

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-07-30

Beschreibung: Author(s): Victor Atanasov and Avadh Saxena We present a calculation of the effective geometry-induced quantum potential for the carriers in graphene shaped as a helicoidal nanoribbon. In this geometry the twist of the nanoribbon plays the role of an effective transverse electric field in graphene and this is reminiscent of the Hall effect. H… [Phys. Rev. B 92, 035440] Published Wed Jul 29, 2015

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

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Stacking dependence of carrier interactions in multilayer graphene systems (2015)

Yunsu Jang, E. H. Hwang, A. H. Mac; Donald, and Hongki Min

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-07-30

Beschreibung: Author(s): Yunsu Jang, E. H. Hwang, A. H. MacDonald, and Hongki Min We identify qualitative trends in the stacking sequence dependence of carrier-carrier interaction phenomena in multilayer graphene. Our theory is based on an approach which explicitly exhibits the important role in interaction phenomena of the momentum-direction-dependent intersite phases determined… [Phys. Rev. B 92, 041411(R)] Published Wed Jul 29, 2015

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Stability and electronic structure of two-dimensional allotropes of group-IV materials (2015)

Filipe Matusalem, Marcelo Marques, Lara K. Teles, and Friedhelm Bechstedt

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-07-30

Beschreibung: Author(s): Filipe Matusalem, Marcelo Marques, Lara K. Teles, and Friedhelm Bechstedt We study six different two-dimensional (2D) allotropes of carbon, silicon, germanium, and tin by means of the ab initio density functional theory for the ground state and approximate methods to calculate their electronic structures, including quasiparticle effects. Four of the investigated allotrope… [Phys. Rev. B 92, 045436] Published Wed Jul 29, 2015

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9

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Electric bias control of impurity effects in bilayer graphene (2015)

Y. G. Pogorelov, M. C. Santos, and V. M. Loktev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Y. G. Pogorelov, M. C. Santos, and V. M. Loktev Formation of localized impurity levels within the band gap in bigraphene under applied electric field and the conditions for their collectivization at finite impurity concentrations are considered. It is shown that a qualitative restructuring of the quasiparticle spectrum within the initial band gap… [Phys. Rev. B 92, 075401] Published Mon Aug 03, 2015

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

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Electronic spectrum of twisted bilayer graphene (2015)

A. O. Sboychakov, A. L. Rakhmanov, A. V. Rozhkov, and Franco Nori

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): A. O. Sboychakov, A. L. Rakhmanov, A. V. Rozhkov, and Franco Nori We study the electronic properties of twisted bilayer graphene in the tight-binding approximation. The interlayer hopping amplitude is modeled by a function which depends not only on the distance between two carbon atoms, but also on the positions of neighboring atoms as well. Using the Lanczos algo… [Phys. Rev. B 92, 075402] Published Mon Aug 03, 2015

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

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Electrical transport limited by electron-phonon coupling from Boltzmann transport equation: An ab initio study of Si, Al, and MoS_{2} (2015)

Wu Li

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Wu Li We demonstrate the ab initio electrical transport calculation limited by electron-phonon coupling by using the full solution of the Boltzmann transport equation (BTE), which applies equally to metals and semiconductors. Numerical issues are emphasized in this work. We show that the simple linear int… [Phys. Rev. B 92, 075405] Published Tue Aug 04, 2015

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12

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Supercurrent reversal in Josephson junctions based on bilayer graphene flakes (2015)

Babak Zare Rameshti, Malek Zareyan, and Ali G. Moghaddam

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Babak Zare Rameshti, Malek Zareyan, and Ali G. Moghaddam We investigate the Josephson effect in a bilayer graphene flake contacted by two monolayer sheets deposited by superconducting electrodes. It is found that when the electrodes are attached to the different layers of the bilayer, the Josephson current is in a π state, if the bilayer region is undoped… [Phys. Rev. B 92, 085403] Published Wed Aug 05, 2015

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Physics of a disordered Dirac point in epitaxial graphene from temperature-dependent magnetotransport measurements (2015)

J. Huang, J. A. Alexander-Webber, A. M. R. Baker, T. J. B. M. Janssen, A. Tzalenchuk, V. Antonov, T. Yager, S. Lara-Avila, S. Kubatkin, R. Yakimova, and R. J. Nicholas

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): J. Huang, J. A. Alexander-Webber, A. M. R. Baker, T. J. B. M. Janssen, A. Tzalenchuk, V. Antonov, T. Yager, S. Lara-Avila, S. Kubatkin, R. Yakimova, and R. J. Nicholas We report a study of disorder effects on epitaxial graphene in the vicinity of the Dirac point by magnetotransport. Hall effect measurements show that the carrier density increases quadratically with temperature, in good agreement with theoretical predictions which take into account intrinsic therma… [Phys. Rev. B 92, 075407] Published Thu Aug 06, 2015

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

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Detection of interlayer interaction in few-layer graphene (2015)

Zefei Wu, Yu Han, Jiangxiazi Lin, Wei Zhu, Mingquan He, Shuigang Xu, Xiaolong Chen, Huanhuan Lu, Weiguang Ye, Tianyi Han, Yingying Wu, Gen Long, Junying Shen, Rui Huang, Lin Wang, Yuheng He, Yuan Cai, Rolf Lortz, Dangsheng Su, and Ning Wang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Zefei Wu, Yu Han, Jiangxiazi Lin, Wei Zhu, Mingquan He, Shuigang Xu, Xiaolong Chen, Huanhuan Lu, Weiguang Ye, Tianyi Han, Yingying Wu, Gen Long, Junying Shen, Rui Huang, Lin Wang, Yuheng He, Yuan Cai, Rolf Lortz, Dangsheng Su, and Ning Wang Bernal-stacked few-layer graphene has been investigated by analyzing its Landau-level spectra through quantum capacitance measurements. We find that surface relaxation, which is insignificant in trilayer graphene, starts to manifest in Bernal-stacked tetralayer graphene. In trilayer graphene, the in… [Phys. Rev. B 92, 075408] Published Thu Aug 06, 2015

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

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Entanglement of indistinguishable particles as a probe for quantum phase transitions in the extended Hubbard model (2015)

Fernando Iemini, Thiago O. Maciel, and Reinaldo O. Vianna

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-19

Beschreibung: Author(s): Fernando Iemini, Thiago O. Maciel, and Reinaldo O. Vianna We investigate the quantum phase transitions of the extended Hubbard model at half-filling with periodic boundary conditions employing the entanglement of particles, as opposed to the more traditional entanglement of modes. Our results show that the entanglement has either discontinuities or local m… [Phys. Rev. B 92, 075423] Published Tue Aug 18, 2015

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Toward a realistic description of multilayer black phosphorus: From GW approximation to large-scale tight-binding simulations (2015)

A. N. Rudenko, Shengjun Yuan, and M. I. Katsnelson

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-19

Beschreibung: Author(s): A. N. Rudenko, Shengjun Yuan, and M. I. Katsnelson We provide a tight-binding model parametrization for black phosphorus (BP) with an arbitrary number of layers. The model is derived from partially self-consistent G W 0 approach, where the screened Coulomb interaction W 0 is calculated within the random phase approximation on the basis of density funct… [Phys. Rev. B 92, 085419] Published Tue Aug 18, 2015

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17

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Topological symmetry breaking: Domain walls and partial instability of chiral edges (2015)

F. A. Bais and S. M. Haaker

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-20

Beschreibung: Author(s): F. A. Bais and S. M. Haaker In two-dimensional topological systems chiral edges may exhibit a spectral change due to the formation of a Bose condensate and partial confinement in the bulk according to the topological symmetry breaking (TSB) mechanism. We analyze in detail what happens in the bulk as well as on the edge for a s… [Phys. Rev. B 92, 075427] Published Wed Aug 19, 2015

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18

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Interaction-induced conductance from zero modes in a clean magnetic graphene waveguide (2015)

Laura Cohnitz, Wolfgang Häusler, Alex Zazunov, and Reinhold Egger

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): Laura Cohnitz, Wolfgang Häusler, Alex Zazunov, and Reinhold Egger We consider a waveguide formed in a clean graphene monolayer by a spatially inhomogeneous magnetic field. The single-particle dispersion relation for this waveguide exhibits a zero-energy Landau-like flat band, while finite-energy bands have dispersion and correspond, in particular, to snake orbits.… [Phys. Rev. B 92, 085422] Published Thu Aug 20, 2015

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Large-gap two-dimensional topological insulator in oxygen functionalized MXene (2015)

Hongming Weng, Ahmad Ranjbar, Yunye Liang, Zhida Song, Mohammad Khazaei, Seiji Yunoki, Masao Arai, Yoshiyuki Kawazoe, Zhong Fang, and Xi Dai

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-25

Beschreibung: Author(s): Hongming Weng, Ahmad Ranjbar, Yunye Liang, Zhida Song, Mohammad Khazaei, Seiji Yunoki, Masao Arai, Yoshiyuki Kawazoe, Zhong Fang, and Xi Dai Two-dimensional (2D) topological insulators (TIs) have been recognized as a new class of quantum state of matter. They are distinguished from normal 2D insulators with their nontrivial band-structure topology identified by the Z 2 number as protected by time-reversal symmetry (TRS). Two-dimensional T… [Phys. Rev. B 92, 075436] Published Mon Aug 24, 2015

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Interaction-enabled topological phases in topological insulator–superconductor heterostructures (2015)

D. I. Pikulin, Ching-Kai Chiu, Xiaoyu Zhu, and M. Franz

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-25

Beschreibung: Author(s): D. I. Pikulin, Ching-Kai Chiu, Xiaoyu Zhu, and M. Franz Topological phases of matter that depend for their existence on interactions are fundamentally interesting and potentially useful as platforms for future quantum computers. Despite the multitude of theoretical proposals, the only interaction-enabled topological phase experimentally observed is the f… [Phys. Rev. B 92, 075438] Published Mon Aug 24, 2015

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Casimir forces of metallic microstructures into cavities (2015)

George Kenanakis, Costas M. Soukoulis, and Eleftherios N. Economou

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-20

Beschreibung: Author(s): George Kenanakis, Costas M. Soukoulis, and Eleftherios N. Economou A theoretical estimate of the Casimir force of a metallic structure embedded into a cubic cavity is proposed. We demonstrate that by calculating the eigenmodes of the system we can determine the Casimir force, which can be either attractive or repulsive, by simply changing the geometry of the struct… [Phys. Rev. B 92, 075430] Published Wed Aug 19, 2015

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Nature of the bias-dependent symmetry reduction of iron phthalocyanine on Cu(111) (2015)

Olesia Snezhkova, Johann Lüder, Alissa Wiengarten, Shiri R. Burema, Felix Bischoff, Yuanqin He, Jan Rusz, Jan Knudsen, Marie-Laure Bocquet, Knud Seufert, Johannes V. Barth, Willi Auwärter, Barbara Brena, and Joachim Schnadt

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-20

Beschreibung: Author(s): Olesia Snezhkova, Johann Lüder, Alissa Wiengarten, Shiri R. Burema, Felix Bischoff, Yuanqin He, Jan Rusz, Jan Knudsen, Marie-Laure Bocquet, Knud Seufert, Johannes V. Barth, Willi Auwärter, Barbara Brena, and Joachim Schnadt Subtle changes in the geometric and electronic properties of supported molecules, with a potential impact on the functioning of molecular devices, can typically be imaged by scanning probe microscopy, but their exact origin and nature often remain unclear. Here we show explicitly that the symmetry r… [Phys. Rev. B 92, 075428] Published Wed Aug 19, 2015

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Thermal properties of black and blue phosphorenes from a first-principles quasiharmonic approach (2015)

Yierpan Aierken, Deniz Çakır, Cem Sevik, and Francois M. Peeters

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-20

Beschreibung: Author(s): Yierpan Aierken, Deniz Çakır, Cem Sevik, and Francois M. Peeters Different allotropes of phosphorene are possible of which black and blue phosphorus are the most stable. While blue phosphorus has isotropic properties, black phosphorus is strongly anisotropic in its electronic and optical properties due to its anisotropic crystal structure. In this work, we system… [Phys. Rev. B 92, 081408(R)] Published Wed Aug 19, 2015

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Charge transport in DNA nanowires connected to carbon nanotubes (2015)

Bikan Tan, Miroslav Hodak, Wenchang Lu, and J. Bernholc

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-20

Beschreibung: Author(s): Bikan Tan, Miroslav Hodak, Wenchang Lu, and J. Bernholc DNA is perhaps the worlds most controllable nanowire, with potential applications in nanoelectronics and sensing. However, understanding of its charge transport (CT) properties remains elusive, with experiments reporting a wide range of behaviors from insulating to superconductive. We report extensi… [Phys. Rev. B 92, 075429] Published Wed Aug 19, 2015

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Experimental evidence for non-Abelian gauge potentials in twisted graphene bilayers (2015)

Long-Jing Yin, Jia-Bin Qiao, Wei-Jie Zuo, Wen-Tian Li, and Lin He

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-20

Beschreibung: Author(s): Long-Jing Yin, Jia-Bin Qiao, Wei-Jie Zuo, Wen-Tian Li, and Lin He Non-Abelian gauge potentials are quite relevant in subatomic physics, but they are relatively rare in a condensed matter context. Here we report the experimental evidence for non-Abelian gauge potentials in twisted graphene bilayers by scanning tunneling microscopy and spectroscopy. At a magic twist… [Phys. Rev. B 92, 081406(R)] Published Wed Aug 19, 2015

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Multiqubit gates protected by adiabaticity and dynamical decoupling applicable to donor qubits in silicon (2015)

Wayne M. Witzel, Inès Montaño, Richard P. Muller, and Malcolm S. Carroll

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-20

Beschreibung: Author(s): Wayne M. Witzel, Inès Montaño, Richard P. Muller, and Malcolm S. Carroll We present a strategy for producing multiqubit gates that promise high fidelity with minimal tuning requirements. Our strategy combines gap protection from the adiabatic theorem with dynamical decoupling in a complementary manner. Energy-level transition errors are protected by adiabaticity and rema… [Phys. Rev. B 92, 081407(R)] Published Wed Aug 19, 2015

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Electron-electron interactions in graphene field-induced quantum dots in a high magnetic field (2015)

A. Orlof, A. A. Shylau, and I. V. Zozoulenko

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): A. Orlof, A. A. Shylau, and I. V. Zozoulenko We study the effect of electron-electron interaction in graphene quantum dots defined by an external electrostatic potential and a high magnetic field. To account for the electron-electron interaction, we use the Thomas-Fermi approximation and find that electron screening causes the formation of com… [Phys. Rev. B 92, 075431] Published Thu Aug 20, 2015

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The two classes of low-energy spectra in finite carbon nanotubes (2015)

Magdalena Marganska, Piotr Chudzinski, and Milena Grifoni

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): Magdalena Marganska, Piotr Chudzinski, and Milena Grifoni We study the spectra of finite-length carbon nanotubes (CNTs) of arbitrary chirality. They divide into two classes, which arise because of different rotational symmetries of the low-energy eigenstates. In one of them (the zigzag class), the spinless spectrum is doubly degenerate and the two states c… [Phys. Rev. B 92, 075433] Published Fri Aug 21, 2015

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Majorana fermions at the edge of superconducting islands (2015)

R. S. Akzyanov, A. L. Rakhmanov, A. V. Rozhkov, and Franco Nori

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): R. S. Akzyanov, A. L. Rakhmanov, A. V. Rozhkov, and Franco Nori We investigate the properties of electron states localized at the edge of a superconducting island placed on the surface of a topological insulator in a magnetic field. In such systems, Majorana fermions emerge if an odd number of vortices (or odd multivortex vorticity) is hosted by the island; othe… [Phys. Rev. B 92, 075432] Published Fri Aug 21, 2015

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Charge neutrality in epitaxial graphene on 6H-SiC(0001) via nitrogen intercalation (2015)

Nuala M. Caffrey, Rickard Armiento, Rositsa Yakimova, and Igor A. Abrikosov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): Nuala M. Caffrey, Rickard Armiento, Rositsa Yakimova, and Igor A. Abrikosov The electronic properties of epitaxial graphene grown on SiC(0001) are known to be impaired relative to those of freestanding graphene. This is due to the formation of a carbon buffer layer between the graphene layers and the substrate, which causes the graphene layers to become strongly n -doped. Ch… [Phys. Rev. B 92, 081409(R)] Published Fri Aug 21, 2015

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Van Hove singularity and ferromagnetic instability in phosphorene (2015)

A. Ziletti, S. M. Huang, D. F. Coker, and H. Lin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): A. Ziletti, S. M. Huang, D. F. Coker, and H. Lin Using Wannier-function-based interpolation techniques, we present compelling numerical evidence for the presence of a saddle-point Van Hove singularity at the Γ point near the phosphorene Fermi energy. We show that in proximity of the Van Hove singularity the spin susceptibility presents the logarit… [Phys. Rev. B 92, 085423] Published Fri Aug 21, 2015

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Hopping conduction via ionic liquid induced silicon surface states (2015)

J. Nelson, K. V. Reich, M. Sammon, B. I. Shklovskii, and A. M. Goldman

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): J. Nelson, K. V. Reich, M. Sammon, B. I. Shklovskii, and A. M. Goldman In order to clarify the physics of the gating of solids by ionic liquids (ILs) we have gated lightly doped p -Si, which is so well studied that it can be called the “hydrogen atom of solid state physics” and can be used as a test bed for ionic liquids. We explore the case where the concentration of i… [Phys. Rev. B 92, 085424] Published Fri Aug 21, 2015

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How grain size controls friction and wear in nanocrystalline metals (2015)

Ao Li and Izabela Szlufarska

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Ao Li and Izabela Szlufarska Using molecular simulations we investigated the dependence of friction and wear on grain size in nanocrystalline copper. We found that effects of grain size are coupled to the effects of contact size, resulting in a transition from grain size–sensitive regime to grain size–insensitive regime in fric… [Phys. Rev. B 92, 075418] Published Fri Aug 14, 2015

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Optical study of a doubly negatively charged exciton in a CdTe/ZnTe quantum dot containing a single Mn ^{2+} ion (2015)

T. Smoleński, M. Koperski, M. Goryca, P. Wojnar, P. Kossacki, and T. Kazimierczuk

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): T. Smoleński, M. Koperski, M. Goryca, P. Wojnar, P. Kossacki, and T. Kazimierczuk We present a magnetospectroscopic study of a doubly negatively charged exciton X 2 − in a CdTe quantum dot doped with a single Mn 2 + ion. The X 2 − emission leading to the singlet final state of an excited electron pair is demonstrated to consist of six distinct lines corresponding to different projectio… [Phys. Rev. B 92, 085415] Published Thu Aug 13, 2015

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Tunneling density of states in quantum dots with anisotropic exchange (2015)

A. U. Sharafutdinov and I. S. Burmistrov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-07-30

Beschreibung: Author(s): A. U. Sharafutdinov and I. S. Burmistrov We reexamine the tunneling density of states in quantum dots and nanoparticles within the model which is an extension of the universal Hamiltonian to the case of uniaxial anisotropic exchange. We derive the exact analytical result for the tunneling density of states in the case of an arbitrary singl… [Phys. Rev. B 92, 035439] Published Wed Jul 29, 2015

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Adsorption of alkali adatoms on graphene supported by the Au/Ni(111) surface (2015)

C. S. Praveen, Simone Piccinin, and Stefano Fabris

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): C. S. Praveen, Simone Piccinin, and Stefano Fabris We study alkali-metal adsorption on supported graphene by means of density-functional-theory calculations that include dispersion corrections. Graphene supported by the Au/Ni(111) surface is an important system for fundamental studies because this surface allows one to support graphene, preserving t… [Phys. Rev. B 92, 075403] Published Mon Aug 03, 2015

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Spin-polarized surface electronic structure of Ta(110): Similarities and differences to W(110) (2015)

B. Engelkamp, H. Wortelen, H. Mirhosseini, A. B. Schmidt, D. Thonig, J. Henk, and M. Donath

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): B. Engelkamp, H. Wortelen, H. Mirhosseini, A. B. Schmidt, D. Thonig, J. Henk, and M. Donath Tantalum and tungsten, direct neighbors in the periodic table, exhibit a very similar electronic structure. Compared with tungsten, however, the bands of tantalum are less occupied due to the lack of one electron. As a consequence, an exceptional Dirac-cone-like surface state, observed below the Fer… [Phys. Rev. B 92, 085401] Published Mon Aug 03, 2015

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Graphene-loaded wire medium for tunable broadband subwavelength imaging (2015)

Ali Forouzmand, Hossein M. Bernety, and Alexander B. Yakovlev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Ali Forouzmand, Hossein M. Bernety, and Alexander B. Yakovlev In this paper, we demonstrate that a wire medium (WM) slab loaded with graphene sheets enables the enhancement of the near field for subwavelength imaging at terahertz frequencies. The analysis is based on the nonlocal homogenization model for WM with the additional boundary condition at the connect… [Phys. Rev. B 92, 085402] Published Mon Aug 03, 2015

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Many-body Majorana operators and the equivalence of parity sectors (2015)

G. Kells

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): G. Kells The one-dimensional p -wave topological superconductor model with open-boundary conditions is examined in its topological phase. Using the eigenbasis of the noninteracting system I show that, provided the interactions are local and do not result in a closing of the gap, then even and odd parity secto… [Phys. Rev. B 92, 081401(R)] Published Mon Aug 03, 2015

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Threshold displacement energies in graphene and single-walled carbon nanotubes (2015)

Andrew Merrill, Cory D. Cress, Jamie E. Rossi, Nathanael D. Cox, and Brian J. Landi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Andrew Merrill, Cory D. Cress, Jamie E. Rossi, Nathanael D. Cox, and Brian J. Landi The threshold displacement energy E d has been determined for graphene and 216 different ( n , m ) single-walled carbon nanotube chiralities, with 5 ≤ n ≤ 20 and 0 ≤ m ≤ n , under several model conditions using classical molecular dynamics. The model conditions vary by particle (electron or carbon ion), empirica… [Phys. Rev. B 92, 075404] Published Mon Aug 03, 2015

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Phosphorene analogues: Isoelectronic two-dimensional group-IV monochalcogenides with orthorhombic structure (2015)

Lídia C. Gomes and A. Carvalho

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Lídia C. Gomes and A. Carvalho The group-IV monochalcogenides SnS, SnSe, GeS, and GeSe form a family within the wider group of semiconductor “phosphorene analogues.” Here, we used first-principles calculations to investigate systematically their structural, electronic, and optical properties, analyzing the changes associated with… [Phys. Rev. B 92, 085406] Published Thu Aug 06, 2015

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Valley entanglement of excitons in monolayers of transition-metal dichalcogenides (2015)

Mikhail Tokman, Yongrui Wang, and Alexey Belyanin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Mikhail Tokman, Yongrui Wang, and Alexey Belyanin We show that excitons in K and K ′ valleys of transition metal dichalcogenide monolayers can be entangled with respect to their valley degree of freedom by absorbing linearly polarized single photons. This effect does not require any interaction between K and K ′ excitons in contrast to conventional m… [Phys. Rev. B 92, 075409] Published Fri Aug 07, 2015

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Metastable electron-electron states in double-layer graphene structures (2015)

L. L. Marnham and A. V. Shytov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): L. L. Marnham and A. V. Shytov The prototypical exciton model of two interacting Dirac particles in graphene was analyzed in J. Sabio et al. , Phys. Rev. B 81 , 045428 (2010) and it was found that in one of the electron-hole scattering channels the total kinetic energy vanishes, resulting in a singular behavior. We show that this … [Phys. Rev. B 92, 085409] Published Fri Aug 07, 2015

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Fractional quantum Hall effect in graphene: Quantitative comparison between theory and experiment (2015)

Ajit C. Balram, Csaba Tőke, A. Wójs, and J. K. Jain

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Ajit C. Balram, Csaba Tőke, A. Wójs, and J. K. Jain The observation of extensive fractional quantum Hall states in graphene brings out the possibility of more accurate quantitative comparisons between theory and experiment than previously possible, because of the negligibility of finite width corrections. We obtain an accurate phase diagram for diffe… [Phys. Rev. B 92, 075410] Published Fri Aug 07, 2015

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Magnetoelectronic properties of multilayer black phosphorus (2015)

Yongjin Jiang, Rafael Roldán, Francisco Guinea, and Tony Low

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Yongjin Jiang, Rafael Roldán, Francisco Guinea, and Tony Low We examine the electronic properties of two-dimensional electron gas in black phosphorus multilayers in the presence of a perpendicular magnetic field, highlighting the role of in-plane anisotropy on various experimental quantities such as ac magnetoconductivity, screening, and magnetoplasmons. We f… [Phys. Rev. B 92, 085408] Published Fri Aug 07, 2015

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Theory of spin-orbit-induced spin relaxation in functionalized graphene (2015)

Jan Bundesmann, Denis Kochan, Fedor Tkatschenko, Jaroslav Fabian, and Klaus Richter

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Jan Bundesmann, Denis Kochan, Fedor Tkatschenko, Jaroslav Fabian, and Klaus Richter We perform a comparative study of the spin relaxation by spin-orbit coupling induced from adatoms (hydrogen and fluorine) in graphene. Two methods are applied, giving consistent results: a full quantum transport simulation of a graphene nanoribbon, and a T -matrix calculation using Green's functions … [Phys. Rev. B 92, 081403(R)] Published Mon Aug 10, 2015

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Anderson localization and topological transition in Chern insulators (2015)

Eduardo V. Castro, M. Pilar López-Sancho, and María A. H. Vozmediano

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Eduardo V. Castro, M. Pilar López-Sancho, and María A. H. Vozmediano We analyze the topological transition and localization evolution of disordered two-dimensional systems with nontrivial topology based on bipartite lattices. Chern insulators with broken time-reversal symmetry show nonstandard behavior for disorder realizations selectively distributed on only one of … [Phys. Rev. B 92, 085410] Published Mon Aug 10, 2015

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Statistics of heat exchange between two resistors (2015)

D. S. Golubev and J. P. Pekola

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): D. S. Golubev and J. P. Pekola We study energy flow between two resistors coupled by an arbitrary linear and lossless electric circuit. We show that the fluctuations of energy transferred between the resistors are determined by random scattering of photons on an effective barrier with frequency dependent transmission probability … [Phys. Rev. B 92, 085412] Published Mon Aug 10, 2015

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Bright and dark singlet excitons via linear and two-photon spectroscopy in monolayer transition-metal dichalcogenides (2015)

Timothy C. Berkelbach, Mark S. Hybertsen, and David R. Reichman

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Timothy C. Berkelbach, Mark S. Hybertsen, and David R. Reichman We discuss the linear and two-photon spectroscopic selection rules for spin-singlet excitons in monolayer transition-metal dichalcogenides. Our microscopic formalism combines a fully k -dependent few-orbital band structure with a many-body Bethe-Salpeter equation treatment of the electron-hole intera… [Phys. Rev. B 92, 085413] Published Mon Aug 10, 2015

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Caustic graphene plasmons with Kelvin angle (2015)

Xihang Shi, Xiao Lin, Fei Gao, Hongyi Xu, Zhaoju Yang, and Baile Zhang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): Xihang Shi, Xiao Lin, Fei Gao, Hongyi Xu, Zhaoju Yang, and Baile Zhang A century-long argument made by Lord Kelvin that all swimming objects have an effective Mach number of 3, corresponding to a Kelvin angle of 19.5° for ship waves, has been challenged recently with the conclusion that the Kelvin angle should gradually transit to the Mach angle as the ship's velocity … [Phys. Rev. B 92, 081404(R)] Published Tue Aug 11, 2015

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Floquet exciton condensation in graphene bilayers (2015)

Chuanyi Zhang, Weifeng Zhang, and Guojun Jin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Chuanyi Zhang, Weifeng Zhang, and Guojun Jin We theoretically study the Floquet exciton condensation, which denotes the exciton condensation under an off-resonant circularly polarized light, in graphene bilayers. The polarized light greatly affects the gap function of the condensate as well as the related physical quantities, e.g., the condens… [Phys. Rev. B 92, 085414] Published Thu Aug 13, 2015

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Electronic transport in graphene with particle-hole-asymmetric disorder (2015)

Max Hering, Martin Schneider, and Piet W. Brouwer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Max Hering, Martin Schneider, and Piet W. Brouwer We study the conductivity of graphene with a smooth but particle-hole-asymmetric disorder potential. Using perturbation theory for the weak-disorder regime and numerical calculations, we investigate how the particle-hole asymmetry shifts the position of the minimal conductivity away from the Dirac p… [Phys. Rev. B 92, 075415] Published Thu Aug 13, 2015

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Dirac electrons and domain walls: A realization in junctions of ferromagnets and topological insulators (2015)

Yago Ferreiros, F. J. Buijnsters, and M. I. Katsnelson

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Yago Ferreiros, F. J. Buijnsters, and M. I. Katsnelson We study a system of Dirac electrons with finite density of charge carriers coupled to an external electromagnetic field in two spatial dimensions, with a domain wall (DW) mass term. The interface between a thin-film ferromagnet and a three-dimensional topological insulator provides a condensed-matt… [Phys. Rev. B 92, 085416] Published Thu Aug 13, 2015

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Uniformity of the pseudomagnetic field in strained graphene (2015)

G. J. Verbiest, S. Brinker, and C. Stampfer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): G. J. Verbiest, S. Brinker, and C. Stampfer We present a numerical study on the uniformity of the pseudomagnetic field in graphene as a function of the relative orientation between the graphene lattice and straining directions. We calculated the deformation of a regular micron-sized graphene hexagon by symmetrically displacing three of its ed… [Phys. Rev. B 92, 075417] Published Fri Aug 14, 2015

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Arsenic-bridged magnetic interactions in an emerging two-dimensional FeAs nanostructure on MnAs (2015)

Christian Helman, Valeria Ferrari, and Ana Maria Llois

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Christian Helman, Valeria Ferrari, and Ana Maria Llois The extreme case of an Fe monolayer deposited onto a manganese arsenide (MnAs) substrate is analyzed using density functional theory. We find that an FeAs quasi-two-dimensional antiferromagnetic surface nanostructure emerges. This nanostructure, which is magnetically nearly decoupled from the substr… [Phys. Rev. B 92, 075416] Published Thu Aug 13, 2015

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Electromagnetic force on structured metallic surfaces (2015)

Andrew H. Velzen and Kevin J. Webb

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-12

Beschreibung: Author(s): Andrew H. Velzen and Kevin J. Webb We present a method by which the relatively weak electromagnetic force exerted on a surface can be dramatically enhanced. By structuring a metal surface at the nanoscale, we show that the force can be substantially increased over that on the planar metallic surface. The basis for this effect is foun… [Phys. Rev. B 92, 115416] Published Fri Sep 11, 2015

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Periodic arrays of intercalated atoms in twisted bilayer graphene: An ab initio investigation (2015)

R. H. Miwa, P. Venezuela, and Eric Suárez Morell

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-12

Beschreibung: Author(s): R. H. Miwa, P. Venezuela, and Eric Suárez Morell We have performed an ab initio investigation of transition metals ( TMs = Mo , Ru , Co , and Pt ) embedded in twisted bilayer graphene (tBG) layers. Our total energy results reveal that, triggered by the misalignment between the graphene layers, Mo and Ru atoms may form a quasiperiodic (triangular) array of in… [Phys. Rev. B 92, 115419] Published Fri Sep 11, 2015

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Monolayer charge-neutral graphene on platinum with extremely weak electron-phonon coupling (2015)

Wei Yao, Eryin Wang, Ke Deng, Shuzhen Yang, Wenyun Wu, Alexei V. Fedorov, Sung-Kwan Mo, Eike F. Schwier, Mingtian Zheng, Yohei Kojima, Hideaki Iwasawa, Kenya Shimada, Kaili Jiang, Pu Yu, Jia Li, and Shuyun Zhou

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-12

Beschreibung: Author(s): Wei Yao, Eryin Wang, Ke Deng, Shuzhen Yang, Wenyun Wu, Alexei V. Fedorov, Sung-Kwan Mo, Eike F. Schwier, Mingtian Zheng, Yohei Kojima, Hideaki Iwasawa, Kenya Shimada, Kaili Jiang, Pu Yu, Jia Li, and Shuyun Zhou Epitaxial growth of graphene on transition metal substrates is an important route for obtaining large scale graphene. However, the interaction between graphene and the substrate often leads to multiple orientations, distorted graphene band structure, large doping, and strong electron-phonon coupling… [Phys. Rev. B 92, 115421] Published Fri Sep 11, 2015

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Effect of gate voltage on spin transport along α-helical protein (2015)

Ting-Rui Pan, Ai-Min Guo, and Qing-Feng Sun

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-12

Beschreibung: Author(s): Ting-Rui Pan, Ai-Min Guo, and Qing-Feng Sun Recently, the chiral-induced spin selectivity in molecular systems has attracted extensive interest among the scientific communities. Here, we investigate the effect of the gate voltage on spin-selective electron transport through the α -helical peptide/protein molecule contacted by two nonmagnetic e… [Phys. Rev. B 92, 115418] Published Fri Sep 11, 2015

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Deeper insight into phase relations in ultrathin Pb films (2015)

Ro-Ya Liu, Angus Huang, Chien-Chung Huang, Chang-Yeh Lee, Chung-Huang Lin, Cheng-Maw Cheng, Ku-Ding Tsuei, Horng-Tay Jeng, Iwao Matsuda, and S.-J. Tang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-12

Beschreibung: Author(s): Ro-Ya Liu, Angus Huang, Chien-Chung Huang, Chang-Yeh Lee, Chung-Huang Lin, Cheng-Maw Cheng, Ku-Ding Tsuei, Horng-Tay Jeng, Iwao Matsuda, and S.-J. Tang Films of Pb ( 111 ) with thickness ranging from 1 to 16 monolayers (ML) were grown on Ge ( 111 ) and examined by angle-resolved photoemission spectroscopy. The measured thickness dependences of the work function and surface energy from the same set of samples were both well described by damped sinusoidal … [Phys. Rev. B 92, 115415] Published Fri Sep 11, 2015

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Direct imaging of coherent quantum transport in graphene p−n−p junctions (2015)

E. D. Herbschleb, R. K. Puddy, P. Marconcini, J. P. Griffiths, G. A. C. Jones, M. Macucci, C. G. Smith, and M. R. Connolly

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-12

Beschreibung: Author(s): E. D. Herbschleb, R. K. Puddy, P. Marconcini, J. P. Griffiths, G. A. C. Jones, M. Macucci, C. G. Smith, and M. R. Connolly We use electrostatic lithography to fabricate a graphene p-n-p junction and exploit the coherence of weakly confined Dirac quasiparticles to image the underlying scattering potential using low-temperature scanning gate microscopy. The tip-induced perturbation to the junction potential modifies the c… [Phys. Rev. B 92, 125414] Published Fri Sep 11, 2015

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Waveguiding by a locally resonant metasurface (2015)

A. A. Maznev and V. E. Gusev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-15

Beschreibung: Author(s): A. A. Maznev and V. E. Gusev Dispersion relations for acoustic and electromagnetic waves guided by resonant inclusions located at the surface of an elastic solid or an interface between two media are analyzed theoretically within the effective medium approximation. Oscillators on the surface of an elastic half-space are shown t… [Phys. Rev. B 92, 115422] Published Mon Sep 14, 2015

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Intervalley biexcitons and many-body effects in monolayer MoS_{2} (2015)

Edbert J. Sie, Alex J. Frenzel, Yi-Hsien Lee, Jing Kong, and Nuh Gedik

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-15

Beschreibung: Author(s): Edbert J. Sie, Alex J. Frenzel, Yi-Hsien Lee, Jing Kong, and Nuh Gedik Interactions between two excitons can result in the formation of bound quasiparticles, known as biexcitons. Their properties are determined by the constituent excitons, with orbital and spin states resembling those of atoms. Monolayer transition metal dichalcogenides (TMDs) present a unique system w… [Phys. Rev. B 92, 125417] Published Mon Sep 14, 2015

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Magnetic field control of near-field radiative heat transfer and the realization of highly tunable hyperbolic thermal emitters (2015)

E. Moncada-Villa, V. Fernández-Hurtado, F. J. García-Vidal, A. García-Martín, and J. C. Cuevas

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-15

Beschreibung: Author(s): E. Moncada-Villa, V. Fernández-Hurtado, F. J. García-Vidal, A. García-Martín, and J. C. Cuevas We present a comprehensive theoretical study of the magnetic field dependence of the near-field radiative heat transfer (NFRHT) between two parallel plates. We show that when the plates are made of doped semiconductors, the near-field thermal radiation can be severely affected by the application of … [Phys. Rev. B 92, 125418] Published Mon Sep 14, 2015

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Theory of reflectivity properties of graphene-coated material plates (2015)

G. L. Klimchitskaya, C. C. Korikov, and V. M. Petrov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-16

Beschreibung: Author(s): G. L. Klimchitskaya, C. C. Korikov, and V. M. Petrov The theoretical description for the reflectivity properties of dielectric, metal, and semiconductor plates coated with graphene is developed in the framework of the Dirac model. Graphene is described by the polarization tensor allowing the analytic continuation to the real frequency axis. The plate … [Phys. Rev. B 92, 125419] Published Tue Sep 15, 2015

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Prediction of a two-dimensional crystalline structure of nitrogen atoms (2015)

V. Ongun Özçelik, O. Üzengi Aktürk, E. Durgun, and S. Ciraci

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-16

Beschreibung: Author(s): V. Ongun Özçelik, O. Üzengi Aktürk, E. Durgun, and S. Ciraci Based on first-principles density functional calculations, we predict that nitrogen atoms can form a single-layer, buckled honeycomb structure called nitrogene, which is rigid and stable even above room temperature. This 2D crystalline phase of nitrogen, which corresponds to a local minimum in the B… [Phys. Rev. B 92, 125420] Published Tue Sep 15, 2015

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Odd-frequency pairing of interacting Majorana fermions (2015)

Zhoushen Huang, P. Wölfle, and A. V. Balatsky

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-16

Beschreibung: Author(s): Zhoushen Huang, P. Wölfle, and A. V. Balatsky Majorana fermions are rising as a promising key component in quantum computation. Although the prevalent approach is to use a quadratic (i.e., noninteracting) Majorana Hamiltonian, when expressed in terms of Dirac fermions, generically the Hamiltonian involves interaction terms. Here we focus on the… [Phys. Rev. B 92, 121404(R)] Published Mon Sep 14, 2015

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In situ characterization of the formation of a mixed conducting phase on the surface of yttria-stabilized zirconia near Pt electrodes (2015)

D. A. Siegel, F. El Gabaly, K. F. McCarty, and N. C. Bartelt

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-16

Beschreibung: Author(s): D. A. Siegel, F. El Gabaly, K. F. McCarty, and N. C. Bartelt The electrochemical reactions of solid oxide fuel cells occur in the region where gas-phase species, electrode, and electrolyte coincide. When the electrode is an ionic insulator and the electrolyte is an electronic insulator, this triple phase boundary is assumed to have atomic dimensions. Here we … [Phys. Rev. B 92, 125421] Published Tue Sep 15, 2015

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Topologically protected charge transfer along the edge of a chiral p-wave superconductor (2015)

N. V. Gnezdilov, B. van Heck, M. Diez, Jimmy A. Hutasoit, and C. W. J. Beenakker

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-16

Beschreibung: Author(s): N. V. Gnezdilov, B. van Heck, M. Diez, Jimmy A. Hutasoit, and C. W. J. Beenakker The Majorana fermions propagating along the edge of a topological superconductor with p x + i p y pairing deliver a shot noise power of 1 2 × e 2 / h per eV of voltage bias. We calculate the full counting statistics of the transferred charge and find that it becomes trinomial in the low-temperature limit, dist… [Phys. Rev. B 92, 121406(R)] Published Tue Sep 15, 2015

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Influence of surface electronic structure on quantum friction between Ag(111) slabs (2015)

Vito Despoja, Vyacheslav M. Silkin, Pedro M. Echenique, and Marijan Šunjić

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-17

Beschreibung: Author(s): Vito Despoja, Vyacheslav M. Silkin, Pedro M. Echenique, and Marijan Šunjić The theoretical formulation developed in Phys. Rev. B 83 , 205424 (2011) is applied to explore how surface electronic structure modifies the noncontact friction force between two silver slabs. We find that the friction shows three distinct regimes for different thicknesses. For very thin slabs N = 1 – 7 … [Phys. Rev. B 92, 125424] Published Wed Sep 16, 2015

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Collision-dominated nonlinear hydrodynamics in graphene (2015)

U. Briskot, M. Schütt, I. V. Gornyi, M. Titov, B. N. Narozhny, and A. D. Mirlin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-18

Beschreibung: Author(s): U. Briskot, M. Schütt, I. V. Gornyi, M. Titov, B. N. Narozhny, and A. D. Mirlin We present an effective hydrodynamic theory of electronic transport in graphene in the interaction-dominated regime. We derive the emergent hydrodynamic description from the microscopic Boltzmann kinetic equation taking into account dissipation due to Coulomb interaction and find the viscosity of Di… [Phys. Rev. B 92, 115426] Published Thu Sep 17, 2015

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Peeling of multilayer graphene creates complex interlayer sliding patterns (2015)

Topi Korhonen and Pekka Koskinen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-18

Beschreibung: Author(s): Topi Korhonen and Pekka Koskinen Peeling, shearing, and sliding are important mechanical phenomena in van der Waals solids. However, theoretically they have been studied mostly using minimal periodic cells and in the context of accurate quantum simulations. Here we investigate the peeling of large-scale multilayer graphene stacks w… [Phys. Rev. B 92, 115427] Published Thu Sep 17, 2015

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Maximizing the purity of a qubit evolving in an anisotropic environment (2015)

Xiaoya Judy Wang, Stefano Chesi, and W. A. Coish

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-18

Beschreibung: Author(s): Xiaoya Judy Wang, Stefano Chesi, and W. A. Coish We provide a general method to calculate and maximize the purity of a qubit interacting with an anisotropic non-Markovian environment. Counter to intuition, we find that the purity is often maximized by preparing and storing the qubit in a superposition of noninteracting eigenstates. For a model rel… [Phys. Rev. B 92, 115424] Published Thu Sep 17, 2015

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Valley currents and nonlocal resistances of graphene nanostructures with broken inversion symmetry from the perspective of scattering theory (2015)

George Kirczenow

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In: Physical Review B

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Publikationsdatum: 2015-09-18

Beschreibung: Author(s): George Kirczenow Valley currents and nonlocal resistances of graphene nanostructures with broken inversion symmetry are considered theoretically in the linear response regime. Scattering state wave functions of electrons entering the nanostructure from the contacts represented by groups of ideal leads are calculated… [Phys. Rev. B 92, 125425] Published Thu Sep 17, 2015

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Nonlinear magnetic dynamics in a nanomagnet–topological insulator heterostructure (2015)

Xiaopeng Duan, Xi-Lai Li, Yuriy G. Semenov, and Ki Wook Kim

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-19

Beschreibung: Author(s): Xiaopeng Duan, Xi-Lai Li, Yuriy G. Semenov, and Ki Wook Kim Magnetization dynamics of a nanomagnet, when strongly coupled with a topological insulator (TI) via the proximity interaction, is examined theoretically in the presence of electrical current on the TI surface under realistic transport conditions. Due to the spin-momentum interlock, the magnetic stat… [Phys. Rev. B 92, 115429] Published Fri Sep 18, 2015

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Nonperturbative renormalization group calculation of quasiparticle velocity and dielectric function of graphene (2015)

Carsten Bauer, Andreas Rückriegel, Anand Sharma, and Peter Kopietz

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Carsten Bauer, Andreas Rückriegel, Anand Sharma, and Peter Kopietz Using a nonperturbative functional renormalization group approach, we calculate the renormalized quasiparticle velocity v ( k ) and the static dielectric function ε ( k ) of suspended graphene as functions of an external momentum k . Our numerical result for v ( k ) can be fitted by v ( k ) / v F = A + B ln ( Λ 0 / k ) , where… [Phys. Rev. B 92, 121409(R)] Published Thu Sep 24, 2015

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Fractional charge and spin states in topological insulator constrictions (2015)

Jelena Klinovaja and Daniel Loss

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Jelena Klinovaja and Daniel Loss We theoretically investigate the properties of two-dimensional topological insulator constrictions both in the integer and fractional regimes. In the presence of a perpendicular magnetic field, the constriction functions as a spin filter with near-perfect efficiency and can be switched by electric f… [Phys. Rev. B 92, 121410(R)] Published Thu Sep 24, 2015

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Quasiparticle band gaps, excitonic effects, and anisotropic optical properties of the monolayer distorted 1T diamond-chain structures ReS_{2} and ReSe_{2} (2015)

Hong-Xia Zhong, Shiyuan Gao, Jun-Jie Shi, and Li Yang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Hong-Xia Zhong, Shiyuan Gao, Jun-Jie Shi, and Li Yang We report many-body perturbation theory calculations of excited-state properties of distorted 1 T diamond-chain monolayer rhenium disulfide ( ReS 2 ) and diselenide ( ReSe 2 ). Electronic self-energy substantially enhances their quasiparticle band gaps and, surprisingly, converts monolayer ReSe 2 to a direc… [Phys. Rev. B 92, 115438] Published Wed Sep 23, 2015

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Entanglement of two, three, or four plasmonically coupled quantum dots (2015)

Matthew Otten, Raman A. Shah, Norbert F. Scherer, Misun Min, Matthew Pelton, and Stephen K. Gray

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Matthew Otten, Raman A. Shah, Norbert F. Scherer, Misun Min, Matthew Pelton, and Stephen K. Gray We model the quantum dynamics of two, three, or four quantum dots (QDs) in proximity to a plasmonic system such as a metal nanoparticle or an array of metal nanoparticles. For all systems, an initial state with only one QD in its excited state evolves spontaneously into a state with entanglement bet… [Phys. Rev. B 92, 125432] Published Wed Sep 23, 2015

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Energy levels of bilayer graphene quantum dots (2015)

D. R. da Costa, M. Zarenia, Andrey Chaves, G. A. Farias, and F. M. Peeters

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): D. R. da Costa, M. Zarenia, Andrey Chaves, G. A. Farias, and F. M. Peeters Within a tight binding approach we investigate the energy levels of hexagonal and triangular bilayer graphene (BLG) quantum dots (QDs) with zigzag and armchair edges. We study AA- and AB- (Bernal) stacked BLG QDs and obtain the energy levels in both the absence and the presence of a perpendicular el… [Phys. Rev. B 92, 115437] Published Wed Sep 23, 2015

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Polarization analysis of excitons in monolayer and bilayer transition-metal dichalcogenides (2015)

Hanan Dery and Yang Song

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Hanan Dery and Yang Song The authors theoretically study optical transitions in transition-metal dichalcogenides. In particular, they explain the difference between the excitonic properties of monolayer MoSe 2 and WSe 2 . Excitons in WSe 2 are thought to be bound to impurities. An alternative theory presented in this paper suggests that these excitons correspond to low-energy optical transitions. The authors also put forward an alternative explanation as to why the excitons in MoSe 2 have vanishing polarization. They attribute this phenomenon to polaron-induced Rabi oscillations between dark and bright excitons. [Phys. Rev. B 92, 125431] Published Wed Sep 23, 2015

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Perspectives for gapped bilayer graphene polaritonics (2015)

Simone De Liberato

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Simone De Liberato Bilayer graphene is normally a semimetal with parabolic dispersion, but a tunable band gap up to few hundreds meV can be opened by breaking the symmetry between the layers through an external potential. Ab initio calculations show that the optical response around the band gap is strongly dominated b… [Phys. Rev. B 92, 125433] Published Wed Sep 23, 2015

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Electrically tunable resonant scattering in fluorinated bilayer graphene (2015)

Adam A. Stabile, Aires Ferreira, Jing Li, N. M. R. Peres, and J. Zhu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Adam A. Stabile, Aires Ferreira, Jing Li, N. M. R. Peres, and J. Zhu Adatom-decorated graphene offers a promising new path towards spintronics in the ultrathin limit. We combine experiment and theory to investigate the electronic properties of dilutely fluorinated bilayer graphene, where the fluorine adatoms covalently bond to the top graphene layer. We show that flu… [Phys. Rev. B 92, 121411(R)] Published Mon Sep 28, 2015

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Temperature-induced strain and doping in monolayer and bilayer isotopically labeled graphene (2015)

T. G. A. Verhagen, K. Drogowska, M. Kalbac, and J. Vejpravova

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): T. G. A. Verhagen, K. Drogowska, M. Kalbac, and J. Vejpravova The electronic band structure of graphene is strongly dependent on the amount of strain and/or doping present. We performed a comprehensive study of temperature-dependent strain and doping in isotopically labeled graphene mono- and bilayers on a SiO 2 / Si substrate by Raman spectral mapping at well-de… [Phys. Rev. B 92, 125437] Published Mon Sep 28, 2015

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Heavy strain conditions in colloidal core-shell quantum dots and their consequences on the vibrational properties from ab initio calculations (2015)

Peng Han and Gabriel Bester

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Peng Han and Gabriel Bester We perform large-scale ab initio density functional theory calculations to study the lattice strain and the vibrational properties of colloidal semiconductor core-shell nanoclusters with up to one thousand atoms (radii up to 15.6 Å). For all the group IV, III-V, and II-VI semiconductors studied, we … [Phys. Rev. B 92, 125438] Published Mon Sep 28, 2015

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Thermal conductivity of silicon nitride membranes is not sensitive to stress (2015)

Hossein Ftouni, Christophe Blanc, Dimitri Tainoff, Andrew D. Fefferman, Martial Defoort, Kunal J. Lulla, Jacques Richard, Eddy Collin, and Olivier Bourgeois

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Hossein Ftouni, Christophe Blanc, Dimitri Tainoff, Andrew D. Fefferman, Martial Defoort, Kunal J. Lulla, Jacques Richard, Eddy Collin, and Olivier Bourgeois We have measured the thermal properties of suspended membranes from 10 to 300 K for two amplitudes of internal stress (about 0.1 and 1 GPa) and for two different thicknesses (50 and 100 nm). The use of the original 3 ω -Volklein method has allowed the extraction of both the specific heat and the therm… [Phys. Rev. B 92, 125439] Published Mon Sep 28, 2015

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Energy shift and conduction-to-valence band transition mediated by a time-dependent potential barrier in graphene (2015)

Andrey Chaves, D. R. da Costa, G. O. de Sousa, J. M. Pereira, Jr., and G. A. Farias

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Andrey Chaves, D. R. da Costa, G. O. de Sousa, J. M. Pereira, Jr., and G. A. Farias We investigate the scattering of a wave packet describing low-energy electrons in graphene by a time-dependent finite-step potential barrier. Our results demonstrate that, after Klein tunneling through the barrier, the electron acquires an extra energy which depends on the rate of change of the barr… [Phys. Rev. B 92, 125441] Published Mon Sep 28, 2015

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Spin relaxation in graphene with self-assembled cobalt porphyrin molecules (2015)

S. Omar, M. Gurram, I. J. Vera-Marun, X. Zhang, E. H. Huisman, A. Kaverzin, B. L. Feringa, and B. J. van Wees

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): S. Omar, M. Gurram, I. J. Vera-Marun, X. Zhang, E. H. Huisman, A. Kaverzin, B. L. Feringa, and B. J. van Wees In graphene spintronics, interaction of localized magnetic moments with the electron spins paves a new way to explore the underlying spin-relaxation mechanism. A self-assembled layer of organic cobalt porphyrin (CoPP) molecules on graphene provides a desired platform for such studies via the magneti… [Phys. Rev. B 92, 115442] Published Fri Sep 25, 2015

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Role of metastable charge states in a quantum-dot spin-qubit readout (2015)

J. D. Mason, S. A. Studenikin, A. Kam, Z. R. Wasilewski, A. S. Sachrajda, and J. B. Kycia

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): J. D. Mason, S. A. Studenikin, A. Kam, Z. R. Wasilewski, A. S. Sachrajda, and J. B. Kycia The authors present an experimental mechanism for converting the state of a spin qubit in a quantum dot device into different charge states. This mechanism depends on metastable charge states present when the device has very asymmetric couplings to the external leads. This approach is used to observe Landau-Zener-Stuckenberg oscillations of the (S- T + ) qubit. [Phys. Rev. B 92, 125434] Published Fri Sep 25, 2015

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Nuclear spin polarization in the electron spin-flip Raman scattering of singly charged (In,Ga)As/GaAs quantum dots (2015)

J. Debus, D. Kudlacik, V. F. Sapega, D. Dunker, P. Bohn, F. Paßmann, D. Braukmann, J. Rautert, D. R. Yakovlev, D. Reuter, A. D. Wieck, and M. Bayer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-21

Beschreibung: Author(s): J. Debus, D. Kudlacik, V. F. Sapega, D. Dunker, P. Bohn, F. Paßmann, D. Braukmann, J. Rautert, D. R. Yakovlev, D. Reuter, A. D. Wieck, and M. Bayer Through an examination of the dynamic nuclear spin polarization and resonant spin-flip Raman scattering, the authors directly measure the optical-induced Overhauser shift in singly charged (In,Ga)As/GaAs quantum dots. Using a two-color laser excitation scheme, they observe the time evolution of the Overhauser shift, which demonstrates the nuclear spin depolarization over a few seconds. Furthermore, it is shown that this depolarization is strongly dependent on temperature. [Phys. Rev. B 92, 195421] Published Fri Nov 20, 2015

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Spin- and valley-dependent transport through arrays of ferromagnetic silicene junctions (2015)

N. Missault, P. Vasilopoulos, V. Vargiamidis, F. M. Peeters, and B. Van Duppen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-21

Beschreibung: Author(s): N. Missault, P. Vasilopoulos, V. Vargiamidis, F. M. Peeters, and B. Van Duppen We study ballistic transport of Dirac fermions in silicene through arrays of barriers, of width d , in the presence of an exchange field M and a tunable potential of height U or depth − U . The spin- and valley-resolved conductances as functions of U or M , exhibit resonances away from the Dirac point (… [Phys. Rev. B 92, 195423] Published Fri Nov 20, 2015

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Surface-interface coupling in an oxide heterostructure: Impact of adsorbates on LaAlO_{3} /SrTiO_{3} (2015)

P. Scheiderer, F. Pfaff, J. Gabel, M. Kamp, M. Sing, and R. Claessen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-21

Beschreibung: Author(s): P. Scheiderer, F. Pfaff, J. Gabel, M. Kamp, M. Sing, and R. Claessen The microscopic origin of the two-dimensional electron system (2DES) at the LaAlO 3 / SrTiO 3 heterointerface remains a topic of debate. Among others, mechanisms involving surface defects acting as electron donors for the 2DES have been proposed recently. Since samples are usually investigated after exp… [Phys. Rev. B 92, 195422] Published Fri Nov 20, 2015

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Electronic structure of helicoidal graphene: Massless Dirac particles on a curved surface with a screw symmetry (2015)

Masataka Watanabe, Hisato Komatsu, Naoto Tsuji, and Hideo Aoki

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-21

Beschreibung: Author(s): Masataka Watanabe, Hisato Komatsu, Naoto Tsuji, and Hideo Aoki Massless Dirac particles on the helicoid are theoretically investigated. With its possible application being helical graphene, we explore how the peculiarities of Dirac particles appear on the curved, screw-symmetric surface. Zweibein is used to derive the massless Dirac equation on the helicoid and… [Phys. Rev. B 92, 205425] Published Fri Nov 20, 2015

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Experimental and theoretical determination of σ bands on (“2 sqrt[3] ×2 sqrt[3] ”) silicene grown on Ag(111) (2015)

W. Wang, W. Olovsson, and R. I. G. Uhrberg

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): W. Wang, W. Olovsson, and R. I. G. Uhrberg Silicene, the two-dimensional (2D) allotrope of silicon, has very recently attracted a lot of attention. It has a structure that is similar to graphene and it is theoretically predicted to show the same kind of electronic properties which have put graphene into the focus of large research and develo… [Phys. Rev. B 92, 205427] Published Mon Nov 23, 2015

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Surface termination of CePt_{5} /Pt(111): The key to chemical inertness (2015)

C. Praetorius, M. Zinner, G. Held, and K. Fauth

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): C. Praetorius, M. Zinner, G. Held, and K. Fauth The surface termination of CePt 5 / Pt ( 111 ) is determined experimentally by LEED-IV. In accordance with recent theoretical predictions, a dense Pt terminated surface is being found. Whereas the CePt 5 volume lattice comprises Pt kagome layers, additional Pt atoms occupy the associated hole positions at … [Phys. Rev. B 92, 195427] Published Mon Nov 23, 2015

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

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Excitonic fine structure splitting in type-II quantum dots (2015)

V. Křápek, P. Klenovský, and T. Šikola

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): V. Křápek, P. Klenovský, and T. Šikola Excitonic fine structure splitting in quantum dots is closely related to the lateral shape of the wave functions. We have studied theoretically the fine structure splitting in InAs quantum dots with a type-II confinement imposed by a GaAsSb capping layer. We show that very small values of the fine s… [Phys. Rev. B 92, 195430] Published Wed Nov 25, 2015

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

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Thema: Physik

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Ferromagnetism and perfect spin filtering in transition-metal-doped graphyne nanoribbons (2015)

Jinbo Pan, Shixuan Du, Yuyang Zhang, Lida Pan, Yanfang Zhang, Hong-Jun Gao, and Sokrates T. Pantelides

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Jinbo Pan, Shixuan Du, Yuyang Zhang, Lida Pan, Yanfang Zhang, Hong-Jun Gao, and Sokrates T. Pantelides Ferromagnetism in half-metallic two-dimensional materials can lead to unique spintronics applications. Here we report first-principles calculations that predict monolayer graphyne nanoribbons (GyNRs), an alternative to graphene, doped randomly with 3 d -series transition metal atoms at medium-to-high … [Phys. Rev. B 92, 205429] Published Wed Nov 25, 2015

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

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Lifting of the Landau level degeneracy in graphene devices in a tilted magnetic field (2015)

F. Chiappini, S. Wiedmann, K. Novoselov, A. Mishchenko, A. K. Geim, J. C. Maan, and U. Zeitler

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): F. Chiappini, S. Wiedmann, K. Novoselov, A. Mishchenko, A. K. Geim, J. C. Maan, and U. Zeitler We report on transport and capacitance measurements of graphene devices in magnetic fields up to 30 T. In both techniques, we observe the full splitting of Landau levels and we employ tilted field experiments to address the origin of the observed broken symmetry states. In the lowest energy level, t… [Phys. Rev. B 92, 201412(R)] Published Tue Nov 24, 2015

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

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Ab initio molecular dynamics with simultaneous electron and phonon excitations: Application to the relaxation of hot atoms and molecules on metal surfaces (2015)

D. Novko, M. Blanco-Rey, J. I. Juaristi, and M. Alducin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): D. Novko, M. Blanco-Rey, J. I. Juaristi, and M. Alducin The relaxation dynamics of hot H, N, and N 2 on Pd(100), Ag(111), and Fe(110), respectively, is studied by means of ab initio molecular dynamics with electronic friction. This method is adapted here to account for the electron density changes caused by lattice vibrations, thus treating on an equal fo… [Phys. Rev. B 92, 201411(R)] Published Tue Nov 24, 2015

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

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Manipulating quantum channels in weak topological insulator nanoarchitectures (2015)

Akihiko Matsumoto, Takashi Arita, Yositake Takane, Yukinori Yoshimura, and Ken-Ichiro Imura

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Akihiko Matsumoto, Takashi Arita, Yositake Takane, Yukinori Yoshimura, and Ken-Ichiro Imura In strong topological insulators protected surface states are always manifest, while in weak topological insulators (WTIs) the corresponding metallic surface states are either manifest or hidden, depending on the orientation of the surface. One can design a nanostep on the surface of a WTI such that… [Phys. Rev. B 92, 195424] Published Mon Nov 23, 2015

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

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