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Metal versus insulator behavior in ultrathin SrTiO_{3} -based heterostructures (2016)

Lars Bjaalie, Anderson Janotti, Burak Himmetoglu, and Chris G. Van de Walle

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-09

Description: Author(s): Lars Bjaalie, Anderson Janotti, Burak Himmetoglu, and Chris G. Van de Walle Complex-oxide interfaces can give rise to two-dimensional electron gases (2DEGs) with extremely high densities: for SrTiO 3 / GdTiO 3 (STO/GTO), a density of 1/2 electron per unit-cell area is found within the STO. In this work we use first-principles calculations to study GTO/STO/GTO heterostructures, … [Phys. Rev. B 94, 035115] Published Thu Jul 07, 2016

Keywords: Electronic structure and strongly correlated systems

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Interplay of Coulomb interaction and spin-orbit coupling (2016)

Jörg Bünemann, Thorben Linneweber, Ute Löw, Frithjof B. Anders, and Florian Gebhard

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-09

Description: Author(s): Jörg Bünemann, Thorben Linneweber, Ute Löw, Frithjof B. Anders, and Florian Gebhard We employ the Gutzwiller variational approach to investigate the interplay of Coulomb interaction and spin-orbit coupling in a three-orbital Hubbard model. Already in the paramagnetic phase we find a substantial renormalization of the spin-orbit coupling that enters the effective single-particle Ham… [Phys. Rev. B 94, 035116] Published Thu Jul 07, 2016

Keywords: Electronic structure and strongly correlated systems

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Topological aspects of nonlinear excitonic processes in noncentrosymmetric crystals (2016)

Takahiro Morimoto and Naoto Nagaosa

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-09

Description: Author(s): Takahiro Morimoto and Naoto Nagaosa We study excitonic processes second order in the electric fields in noncentrosymmetric crystals. We derive formulas for shift current and second harmonic generation produced by exciton creation, by using the Floquet formalism combined with the Keldysh Green's function method. It is shown that (i) th… [Phys. Rev. B 94, 035117] Published Thu Jul 07, 2016

Keywords: Electronic structure and strongly correlated systems

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Multiscale modeling of polycrystalline graphene: A comparison of structure and defect energies of realistic samples from phase field crystal models (2016)

Petri Hirvonen, Mikko M. Ervasti, Zheyong Fan, Morteza Jalalvand, Matthew Seymour, S. Mehdi Vaez Allaei, Nikolas Provatas, Ari Harju, Ken R. Elder, and Tapio Ala-Nissila

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-12

Description: Author(s): Petri Hirvonen, Mikko M. Ervasti, Zheyong Fan, Morteza Jalalvand, Matthew Seymour, S. Mehdi Vaez Allaei, Nikolas Provatas, Ari Harju, Ken R. Elder, and Tapio Ala-Nissila We extend the phase field crystal (PFC) framework to quantitative modeling of polycrystalline graphene. PFC modeling is a powerful multiscale method for finding the ground state configurations of large realistic samples that can be further used to study their mechanical, thermal, or electronic prope… [Phys. Rev. B 94, 035414] Published Mon Jul 11, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Electron diffraction by plasmon waves (2016)

F. J. García de Abajo, B. Barwick, and F. Carbone

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-12

Description: Author(s): F. J. García de Abajo, B. Barwick, and F. Carbone The properties of an electron beam can be manipulated by electromagnetic fields in vacuum via the ponderomotive force. Such an interaction is also at the core of the Kapitza-Dirac effect, which describes the diffraction of electrons by an optical standing wave. Here, the authors predict a new type of interaction between electrons and the electromagnetic field, opening up new possibilities for the manipulation of electron beams. If surface plasmon polaritons are tailored to interfere forming a periodic field pattern, it becomes possible to diffract electrons from such near field. With the proper manipulation of the plasmonic fields, orbital angular momentum can be imparted to the electrons, and even the phase of their wave functions can be manipulated. An additional degree of freedom is provided by the possibility to tailor the spatial properties of the light and the materials supporting the surface plasmons. This arbitrary control can be extended to different substrates such as graphene or layered systems and may open up a viable route to create tunable phase plates for electron microscopes. [Phys. Rev. B 94, 041404(R)] Published Mon Jul 11, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Output squeezed radiation from dispersive ultrastrong light-matter coupling (2016)

S. Fedortchenko, S. Huppert, A. Vasanelli, Y. Todorov, C. Sirtori, C. Ciuti, A. Keller, T. Coudreau, and P. Milman

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-12

Description: Author(s): S. Fedortchenko, S. Huppert, A. Vasanelli, Y. Todorov, C. Sirtori, C. Ciuti, A. Keller, T. Coudreau, and P. Milman We investigate the output generation of squeezed radiation of a cavity photon mode coupled to another off-resonant bosonic excitation. By modulating in time their linear interaction, we predict a high degree of output squeezing when the dispersive ultra-strong-coupling regime is achieved, i.e., when… [Phys. Rev. A 94, 013821] Published Mon Jul 11, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

Print ISSN: 1050-2947

Electronic ISSN: 1094-1622

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Inverted pendulum state of a polariton Rabi oscillator (2016)

N. S. Voronova, A. A. Elistratov, and Yu. E. Lozovik

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-12

Description: Author(s): N. S. Voronova, A. A. Elistratov, and Yu. E. Lozovik Exciton-photon beats known as polariton Rabi oscillations in semiconductor microcavities are usually excited by short pulses of light. We consider a different pumping scheme, assuming a cw pumping of the Rabi oscillator from an exciton reservoir. We account for the initial pulse of light setting the… [Phys. Rev. B 94, 045413] Published Mon Jul 11, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Tomography of Majorana fermions with STM tips (2016)

Denis Chevallier and Jelena Klinovaja

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-13

Description: Author(s): Denis Chevallier and Jelena Klinovaja We investigate numerically the possibility to detect the spatial profile of Majorana fermions (MFs) by using STM tips that are made of either normal or superconducting material. In both cases, we are able to resolve the localization length and the oscillation period of the MF wave function. We show … [Phys. Rev. B 94, 035417] Published Tue Jul 12, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Low-temperature conducting state in two candidate topological Kondo insulators: SmB_{6} and Ce_{3} Bi_{4} Pt_{3} (2016)

N. Wakeham, P. F. S. Rosa, Y. Q. Wang, M. Kang, Z. Fisk, F. Ronning, and J. D. Thompson

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-13

Description: Author(s): N. Wakeham, P. F. S. Rosa, Y. Q. Wang, M. Kang, Z. Fisk, F. Ronning, and J. D. Thompson The authors have studied SmB 6 and Ce 3 Bi 4 Pt 3 . Both of these Kondo insulators show a saturation of the increasing resistivity at low temperature that suggests an additional conduction channel and is consistent with the theoretical prediction that these systems should host robust surface states due to their nontrivial topology. While previous work has shown that the resistance saturation in SmB 6 is due to conducting surface states, this work demonstrates that the origin of the resistance saturation in Ce 3 Bi 4 Pt 3 is through the bulk of the material and not the surface. The contrasting behavior of the two materials when the surface is disordered with ion-irradiation supports this conclusion, and also demonstrates the sensitivity of the resistance of the surface state in SmB 6 to small levels of disorder. Finally, the low-temperature specific heat of SmB 6 shows a residual linear term, and the origin of this term has been highly debated recently. Through measurements of single crystals and powders, it is shown that this term dominantly arises from the bulk and not the surface state. [Phys. Rev. B 94, 035127] Published Tue Jul 12, 2016

Keywords: Electronic structure and strongly correlated systems

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Pulse propagation in the interacting one-dimensional Bose liquid (2016)

A. D. Sarishvili, I. V. Protopopov, and D. B. Gutman

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-13

Description: Author(s): A. D. Sarishvili, I. V. Protopopov, and D. B. Gutman We study wave propagation in interacting Bose liquid, where the short-range part of the interaction between atoms is of a hard-core type, and its long-range part scales with a distance as a power law. The cases of Coulomb, dipole-dipole and van der Waals interaction are considered. We employ a hydro… [Phys. Rev. B 94, 045110] Published Tue Jul 12, 2016

Keywords: Electronic structure and strongly correlated systems

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Impurity invisibility in graphene: Symmetry guidelines for the design of efficient sensors (2016)

John Duffy, James Lawlor, Caio Lewenkopf, and Mauro S. Ferreira

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-13

Description: Author(s): John Duffy, James Lawlor, Caio Lewenkopf, and Mauro S. Ferreira Renowned for its sensitivity to detect the presence of numerous substances, graphene is an excellent chemical sensor. Unfortunately, which general features a dopant must have in order to enter the list of substances detectable by graphene are not exactly known. Here we demonstrate with a simple mode… [Phys. Rev. B 94, 045417] Published Tue Jul 12, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Observing single-atom diffusion at a molecule-metal interface (2016)

Johannes Mielke, Jesús Martínez-Blanco, Maike V. Peters, Stefan Hecht, and Leonhard Grill

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-13

Description: Author(s): Johannes Mielke, Jesús Martínez-Blanco, Maike V. Peters, Stefan Hecht, and Leonhard Grill The dynamics at the interface between a close-packed porphyrin monolayer and Au(111) is investigated by time-dependent scanning tunneling microscopy, detecting the motion of single-interface adatoms in real space. Imaging sequences reveal predominant switching of the molecular appearance in adjacent… [Phys. Rev. B 94, 035416] Published Tue Jul 12, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Limitations of effective medium theory in multilayer graphite/hBN heterostructures (2016)

René Petersen, Thomas Garm Pedersen, Morten Niklas Gjerding, and Kristian Sommer Thygesen

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-13

Description: Author(s): René Petersen, Thomas Garm Pedersen, Morten Niklas Gjerding, and Kristian Sommer Thygesen We apply effective medium theory (EMT) to metamaterials consisting of a varying number of consecutive sheets of graphene and hexagonal boron nitride, and compare this with a full calculation of the permittivity and the reflection based on the tight binding method and the transfer matrix method in or… [Phys. Rev. B 94, 035128] Published Tue Jul 12, 2016

Keywords: Electronic structure and strongly correlated systems

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Mapping the intramolecular contributions to the inelastic electron tunneling signal of a molecular junction (2016)

Giuseppe Foti and Héctor Vázquez

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-13

Description: Author(s): Giuseppe Foti and Héctor Vázquez We present a quantitative analysis of the intramolecular origin of the inelastic electron tunneling signal of a molecular junction. We use density-functional theory to study a representative conjugated molecule with a low degree of symmetry and calculate, for all modes, the different contributions t… [Phys. Rev. B 94, 045418] Published Tue Jul 12, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Entanglement and Majorana edge states in the Kitaev model (2016)

Saptarshi Mandal, Moitri Maiti, and Vipin Kerala Varma

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-13

Description: Author(s): Saptarshi Mandal, Moitri Maiti, and Vipin Kerala Varma We investigate the von Neumann entanglement entropy and Schmidt gap in the vortex-free ground state of the Kitaev model on the honeycomb lattice for square/rectangular and cylindrical subsystems. We find that, for both the subsystems, the free-fermionic contribution to the entanglement entropy S E ex… [Phys. Rev. B 94, 045421] Published Tue Jul 12, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Extremely long-lived magnetic excitations in supported Fe chains (2016)

J. P. Gauyacq and N. Lorente

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-13

Description: Author(s): J. P. Gauyacq and N. Lorente We report on a theoretical study of the lifetime of the first excited state of spin chains made of an odd number of Fe atoms on C u 2 N / Cu ( 100 ) . Yan, Choi, Burgess, Rolf-Pissarczyk, and Loth [ Nat. Nanotech. 10 , 40 (2015) ] recently observed very long lifetimes in the case of F e 3 chains. We consider the … [Phys. Rev. B 94, 045420] Published Tue Jul 12, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Coherent nonlinear optical response of graphene in the quantum Hall regime (2016)

H. K. Avetissian and G. F. Mkrtchian

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-13

Description: Author(s): H. K. Avetissian and G. F. Mkrtchian We study the nonlinear optical response of graphene in the quantum Hall regime to an intense laser pulse. In particular, we consider the harmonic generation process. We demonstrate that the generalized magneto-optical conductivity of graphene on the harmonics of a strong pump laser radiation has a c… [Phys. Rev. B 94, 045419] Published Tue Jul 12, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Smith-Purcell radiation emission in aperiodic arrays (2016)

J. R. M. Saavedra, D. Castells-Graells, and F. Javier García de Abajo

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-14

Description: Author(s): J. R. M. Saavedra, D. Castells-Graells, and F. Javier García de Abajo We study the Smith-Purcell light emission produced by electrons moving parallel to linear aperiodic particle arrays. This constitutes a generalization of this type of phenomenon from periodic to aperiodic structures. As in the periodic case, the emission is found to exhibit intense features in its a… [Phys. Rev. B 94, 035418] Published Wed Jul 13, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Many-body localization and transition by density matrix renormalization group and exact diagonalization studies (2016)

S. P. Lim and D. N. Sheng

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-14

Description: Author(s): S. P. Lim and D. N. Sheng This paper focuses on developing a new algorithm (En-DMRG) for obtaining highly excited states of disordered and strongly interacting spin systems. This line of research is stimulated by the growing interest in understanding the many-body localized (MBL) state, which emerges in disordered interacting systems at high energy densities through a disorder-driven dynamic phase transition. By studying the one-dimensional Heisenberg spin chain (with up to 72 spins) in a random field, the authors demonstrate the accuracy of the method in obtaining energy eigenstates and the corresponding statistical results of the quantum system in the MBL phase. The method presented in this work has the potential to be applicable in a variety of quantum statistical physics problems, possibly including the MBL phase in higher dimensions. [Phys. Rev. B 94, 045111] Published Wed Jul 13, 2016

Keywords: Electronic structure and strongly correlated systems

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Superconductivity and Shubnikov–de Haas oscillations in the noncentrosymmetric half-Heusler compound YPtBi (2016)

Orest Pavlosiuk, Dariusz Kaczorowski, and Piotr Wiśniewski

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-14

Description: Author(s): Orest Pavlosiuk, Dariusz Kaczorowski, and Piotr Wiśniewski Recent findings of possible topological superconductivity in YPtBi motivated us to grow and investigate single crystals of this material. The compound was studied by means of ac magnetic susceptibility, electrical resistivity, Hall resistivity, and heat capacity measurements, performed in wide range… [Phys. Rev. B 94, 035130] Published Wed Jul 13, 2016

Keywords: Electronic structure and strongly correlated systems

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Interaction-driven fractional quantum Hall state of hard-core bosons on kagome lattice at one-third filling (2016)

W. Zhu, S. S. Gong, and D. N. Sheng

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-14

Description: Author(s): W. Zhu, S. S. Gong, and D. N. Sheng There has been a growing interest in realizing topologically nontrivial states of matter in band insulators, where a quantum Hall effect can appear as an intrinsic property of the band structure. While ongoing progress is under way with a number of directions, the possibility of realizing novel inte… [Phys. Rev. B 94, 035129] Published Wed Jul 13, 2016

Keywords: Electronic structure and strongly correlated systems

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Time scales for Majorana manipulation using Coulomb blockade in gate-controlled superconducting nanowires (2016)

Michael Hell, Jeroen Danon, Karsten Flensberg, and Martin Leijnse

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-16

Description: Author(s): Michael Hell, Jeroen Danon, Karsten Flensberg, and Martin Leijnse We numerically compute the low-energy spectrum of a gate-controlled superconducting topological nanowire segmented into two islands, each Josephson coupled to a bulk superconductor. This device may host two pairs of Majorana bound states and could provide a platform for testing Majorana fusion rules… [Phys. Rev. B 94, 035424] Published Fri Jul 15, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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First-principles search for n-type oxide, nitride, and sulfide thermoelectrics (2016)

Kevin F. Garrity

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-16

Description: Author(s): Kevin F. Garrity Oxides have many potentially desirable characteristics for thermoelectric applications, including low cost and stability at high temperatures, but thus far there are few known high z T n -type oxide thermoelectrics. In this work, we use high-throughput first-principles calculations to screen transition… [Phys. Rev. B 94, 045122] Published Fri Jul 15, 2016

Keywords: Electronic structure and strongly correlated systems

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Quantum thermal transport in stanene (2016)

Hangbo Zhou, Yongqing Cai, Gang Zhang, and Yong-Wei Zhang

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-16

Description: Author(s): Hangbo Zhou, Yongqing Cai, Gang Zhang, and Yong-Wei Zhang By way of the nonequilibrium Green's function simulations and analytical expressions, the quantum thermal conductance of stanene is studied. We find that, due to the existence of Dirac fermion in stanene, the ratio of electron thermal conductance and electric conductance becomes a chemical-potential… [Phys. Rev. B 94, 045423] Published Fri Jul 15, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Simulating atomic force microscope images with density functional theory: The role of nonclassical contributions to the force (2016)

Philipp Schaffhauser and Stephan Kümmel

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-19

Description: Author(s): Philipp Schaffhauser and Stephan Kümmel Atomic force microscopy is one of the techniques that allows us to visualize objects that we cannot see directly. The question of what we actually see when we look at an atomic force microscopy image is, however, a subtle one. This paper discusses a scheme that permits the calculation of atomic force microscopy images with relatively little effort. Using electronic density functional theory, the force on the cantilever is calculated as the gradient of the effective potential that governs the electronic structure in density functional theory. In this way, nonclassical contributions to the force can efficiently be taken into account and are translated into an image. Comparison to experimental images shows that the nonclassical contribution to the force can make a visible difference. [Phys. Rev. B 94, 035426] Published Mon Jul 18, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Magnetic Dirac fermions and Chern insulator supported on pristine silicon surface (2016)

Huixia Fu, Zheng Liu, Chao Lian, Jin Zhang, Hui Li, Jia-Tao Sun, and Sheng Meng

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-19

Description: Author(s): Huixia Fu, Zheng Liu, Chao Lian, Jin Zhang, Hui Li, Jia-Tao Sun, and Sheng Meng Emergence of ferromagnetism in nonmagnetic semiconductors is strongly desirable, especially in topological materials because of the possibility of achieving the quantum anomalous Hall effect. Based on first-principles calculations, we propose that for Si thin film grown on metal substrate, the prist… [Phys. Rev. B 94, 035427] Published Mon Jul 18, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Transport through a quantum spin Hall antidot as a spectroscopic probe of spin textures (2016)

Alexia Rod, Giacomo Dolcetto, Stephan Rachel, and Thomas L. Schmidt

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-19

Description: Author(s): Alexia Rod, Giacomo Dolcetto, Stephan Rachel, and Thomas L. Schmidt We investigate electron transport through an antidot embedded in a narrow strip of a two-dimensional topological insulator. We focus on the most generic and experimentally relevant case with broken axial spin symmetry. Spin-nonconservation allows additional scattering processes, which change the tra… [Phys. Rev. B 94, 035428] Published Mon Jul 18, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Tunneling into and between helical edge states: Fermionic approach (2016)

D. N. Aristov and R. A. Niyazov

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-19

Description: Author(s): D. N. Aristov and R. A. Niyazov We study the four-terminal junction of spinless Luttinger liquid wires, which describes either a corner junction of two helical edge states of topological insulators or the tunneling from the spinful wire into the helical edge state. We use the fermionic representation and the scattering state forma… [Phys. Rev. B 94, 035429] Published Mon Jul 18, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Raman spectroscopy of intercalated and misfit layer nanotubes (2016)

Matthias Staiger, Vladimir Bačić, Roland Gillen, Gal Radovsky, Konstantin Gartsman, Reshef Tenne, Thomas Heine, Janina Maultzsch, and Christian Thomsen

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-19

Description: Author(s): Matthias Staiger, Vladimir Bačić, Roland Gillen, Gal Radovsky, Konstantin Gartsman, Reshef Tenne, Thomas Heine, Janina Maultzsch, and Christian Thomsen We present Raman spectra of misfit layer ( PbS ) 1.14 NbS 2 nanotubes and lead intercalated NbS 2 nanotubes. They represent interesting model systems to investigate the nature of interlayer interaction in layered materials. A direct correlation to the Raman modes of the parent 2 H − NbS 2 compound exists, but… [Phys. Rev. B 94, 035430] Published Mon Jul 18, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Direct evidence of metallic bands in a monolayer boron sheet (2016)

Baojie Feng, Jin Zhang, Ro-Ya Liu, Takushi Iimori, Chao Lian, Hui Li, Lan Chen, Kehui Wu, Sheng Meng, Fumio Komori, and Iwao Matsuda

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-19

Description: Author(s): Baojie Feng, Jin Zhang, Ro-Ya Liu, Takushi Iimori, Chao Lian, Hui Li, Lan Chen, Kehui Wu, Sheng Meng, Fumio Komori, and Iwao Matsuda The search for metallic boron allotropes has attracted great attention in the past decades and recent theoretical works predict the existence of metallicity in monolayer boron. Here, we synthesize the β 12 -sheet monolayer boron on a Ag(111) surface and confirm the presence of metallic boron-derived b… [Phys. Rev. B 94, 041408(R)] Published Mon Jul 18, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Resonance fluorescence spectrum of a Λ-type quantum emitter close to a metallic nanoparticle (2016)

F. Carreño, M. A. Antón, V. Yannopapas, and E. Paspalakis

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-20

Description: Author(s): F. Carreño, M. A. Antón, V. Yannopapas, and E. Paspalakis We theoretically study the resonance fluorescence spectrum of a three-level quantum emitter coupled to a spherical metallic nanoparticle. We consider the case in which the quantum emitter is driven by a single laser field along one of the optical transitions. We show that the development of the spec… [Phys. Rev. A 94, 013834] Published Tue Jul 19, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Effect of the spatial coherence length on the self-reconfiguration of a speckle field (2016)

Cleberson R. Alves, Alcenísio J. Jesus-Silva, and Eduardo J. S. Fonseca

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-20

Description: Author(s): Cleberson R. Alves, Alcenísio J. Jesus-Silva, and Eduardo J. S. Fonseca The self-reconfiguration property of a speckle pattern is characterized by having the same autocorrelation profile before and after the obstacle from the point at which the intensity speckle distribution is reestablished; i.e., the speckle pattern becomes homogeneous with no signature of the obstacl… [Phys. Rev. A 94, 013835] Published Tue Jul 19, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Light reflector, amplifier, and splitter based on gain-assisted photonic band gaps (2016)

Yan Zhang, Yi-Mou Liu, Tai-Yu Zheng, and Jin-Hui Wu

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-20

Description: Author(s): Yan Zhang, Yi-Mou Liu, Tai-Yu Zheng, and Jin-Hui Wu We study both the steady and the dynamic optical response of cold atoms trapped in an optical lattice and driven to the three-level Λ configuration. These atoms are found to exhibit gain without population inversion when an incoherent pump is applied to activate spontaneously generated coherence. Ga… [Phys. Rev. A 94, 013836] Published Tue Jul 19, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Spectral correlation control in down-converted photon pairs (2016)

Andrzej Gajewski and Piotr Kolenderski

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-20

Description: Author(s): Andrzej Gajewski and Piotr Kolenderski Sources of photon pairs based on the spontaneous parametric down-conversion process are commonly used for long-distance quantum communication and quantum information processing. The key feature for improving the range of transmission is engineering their spectral properties. Our analysis shows the w… [Phys. Rev. A 94, 013838] Published Tue Jul 19, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Anomalous parity-time–symmetry transition away from an exceptional point (2016)

Li Ge

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-20

Description: Author(s): Li Ge Parity-time ( PT ) symmetric systems have two distinguished phases, e.g., one with real-energy eigenvalues and the other with complex-conjugate eigenvalues. To enter one phase from the other, it is believed that the system must pass through an exceptional point, which is a non-Hermitian degenerate poi… [Phys. Rev. A 94, 013837] Published Tue Jul 19, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Hybridization of photon-plasmon modes in metal-coated microtubular cavities (2016)

Yin Yin, Shilong Li, Vivienne Engemaier, Silvia Giudicatti, Ehsan Saei Ghareh Naz, Libo Ma, and Oliver G. Schmidt

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-20

Description: Author(s): Yin Yin, Shilong Li, Vivienne Engemaier, Silvia Giudicatti, Ehsan Saei Ghareh Naz, Libo Ma, and Oliver G. Schmidt The coupling of resonant light and surface plasmons in metal layer–coated optical microcavities results in the formation of hybrid photon-plasmon modes. Here, we comprehensively investigate the hybridization mechanism of photon-plasmon modes based on optoplasmonic microtubular cavities. By changing … [Phys. Rev. A 94, 013832] Published Tue Jul 19, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Reinterpreting the magnetoelectric coupling of polarizability tensors of infinite cylinders using symmetry: A simple TM/TE view (2016)

Parry Y. Chen, Jacob Ben-Yakar, and Yonatan Sivan

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-21

Description: Author(s): Parry Y. Chen, Jacob Ben-Yakar, and Yonatan Sivan Recently, Strickland et al. [ Phys. Rev. B 91 , 085104 (2015) ] retrieved dynamic polarizabilities of infinitely long wires at oblique incidence, reporting nonzero magnetoelectric coupling, seemingly defying existing theorems which forbid this in centrosymmetric scatterers. We reconcile this finding w… [Phys. Rev. B 94, 035142] Published Wed Jul 20, 2016

Keywords: Electronic structure and strongly correlated systems

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Hierarchy of correlations: Application to Green's functions and interacting topological phases (2016)

Álvaro Gómez-León

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-21

Description: Author(s): Álvaro Gómez-León We study the many-body physics of different quantum systems using a hierarchy of correlations, which corresponds to a generalization of the 1 / Z hierarchy. The decoupling scheme obtained from this hierarchy is adapted to calculate double-time Green's functions and due to its nonperturbative nature, w… [Phys. Rev. B 94, 035144] Published Wed Jul 20, 2016

Keywords: Electronic structure and strongly correlated systems

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Tunable point nodes from line-node semimetals via application of light (2016)

Awadhesh Narayan

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-21

Description: Author(s): Awadhesh Narayan We propose that illumination with light provides a useful platform for creating tunable semimetals. We show that by shining light on semimetals with a line degeneracy, one can convert them to a point-node semimetal. These point nodes are adjustable, and their position can be controlled by simply rot… [Phys. Rev. B 94, 041409(R)] Published Wed Jul 20, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Controlling the dark exciton spin eigenstates by external magnetic field (2016)

L. Gantz, E. R. Schmidgall, I. Schwartz, Y. Don, E. Waks, G. Bahir, and D. Gershoni

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-21

Description: Author(s): L. Gantz, E. R. Schmidgall, I. Schwartz, Y. Don, E. Waks, G. Bahir, and D. Gershoni We study the dark exciton's behavior as a coherent physical two-level spin system (qubit) using an external magnetic field in the Faraday configuration. Our studies are based on polarization-sensitive intensity autocorrelation measurements of the optical transition resulting from the recombination o… [Phys. Rev. B 94, 045426] Published Wed Jul 20, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Thermopower signatures and spectroscopy of the canyon of conductance suppression (2016)

G. Kiršanskas, S. Hammarberg, O. Karlström, and A. Wacker

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-21

Description: Author(s): G. Kiršanskas, S. Hammarberg, O. Karlström, and A. Wacker Interference effects in quantum dots between different transport channels can lead to a strong suppression of conductance, which cuts like a canyon through the common conductance plot [ Phys. Rev. Lett. 104 , 186804 (2010) ]. In the present work we consider the thermoelectric transport properties of th… [Phys. Rev. B 94, 045427] Published Wed Jul 20, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Localization transition in the presence of cavity backaction (2016)

Katharina Rojan, Rebecca Kraus, Thomás Fogarty, Hessam Habibian, Anna Minguzzi, and Giovanna Morigi

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-21

Description: Author(s): Katharina Rojan, Rebecca Kraus, Thomás Fogarty, Hessam Habibian, Anna Minguzzi, and Giovanna Morigi We study the localization transition of an atom confined by an external optical lattice in a high-finesse cavity. The atom-cavity coupling yields an effective secondary lattice potential, whose wavelength is incommensurate with the periodicity of the optical lattice. The cavity lattice can induce lo… [Phys. Rev. A 94, 013839] Published Wed Jul 20, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Spin waves and magnetic exchange interactions in the spin-ladder compound RbFe_{2} Se_{3} (2016)

Meng Wang, Ming Yi, Shangjian Jin, Hongchen Jiang, Yu Song, Huiqian Luo, A. D. Christianson, C. de la Cruz, E. Bourret-Courchesne, Dao-Xin Yao, D. H. Lee, and R. J. Birgeneau

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-21

Description: Author(s): Meng Wang, Ming Yi, Shangjian Jin, Hongchen Jiang, Yu Song, Huiqian Luo, A. D. Christianson, C. de la Cruz, E. Bourret-Courchesne, Dao-Xin Yao, D. H. Lee, and R. J. Birgeneau We report an inelastic neutron scattering study of the spin waves of the one-dimensional antiferromagnetic spin ladder compound RbFe 2 Se 3 . The results reveal that the products, S J 's, of the spin S and the magnetic exchange interaction J along the antiferromagnetic (leg) direction and the ferromagneti… [Phys. Rev. B 94, 041111(R)] Published Wed Jul 20, 2016

Keywords: Electronic structure and strongly correlated systems

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Dynamical conductivity and its fluctuations along the crossover to many-body localization (2016)

Osor S. Barišić, Jure Kokalj, Ivan Balog, and Peter Prelovšek

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-21

Description: Author(s): Osor S. Barišić, Jure Kokalj, Ivan Balog, and Peter Prelovšek We present a numerical study of the many-body localization (MBL) phenomenon in the high-temperature limit within an anisotropic Heisenberg model with random local fields. Taking the dynamical spin conductivity σ ( ω ) as the test quantity, we investigate the full frequency dependence of sample-to-sampl… [Phys. Rev. B 94, 045126] Published Wed Jul 20, 2016

Keywords: Electronic structure and strongly correlated systems

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Parafermion chain with 2π/k Floquet edge modes (2016)

G. J. Sreejith, Achilleas Lazarides, and Roderich Moessner

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-21

Description: Author(s): G. J. Sreejith, Achilleas Lazarides, and Roderich Moessner We study parafermion chains with Z k symmetry subject to a periodic binary drive, focusing on the case k = 3 . We find that the chains support different Floquet edge modes at nontrivial quasienergies, distinct from those for the static system. We map out the corresponding phase diagram by a combination … [Phys. Rev. B 94, 045127] Published Wed Jul 20, 2016

Keywords: Electronic structure and strongly correlated systems

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Propagation of electromagnetic waves in PT-symmetric hyperbolic structures (2016)

O. V. Shramkova and G. P. Tsironis

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-21

Description: Author(s): O. V. Shramkova and G. P. Tsironis We investigate theoretically and numerically the propagation of electromagnetic waves in P T -symmetric periodic stacks composed of hyperbolic metamaterial layers separated by dielectric media with balanced loss and gain. We derive the characteristic frequencies governing the dispersion properties of … [Phys. Rev. B 94, 035141] Published Wed Jul 20, 2016

Keywords: Electronic structure and strongly correlated systems

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How to infer non-Abelian statistics and topological visibility from tunneling conductance properties of realistic Majorana nanowires (2016)

S. Das Sarma, Amit Nag, and Jay D. Sau

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-21

Description: Author(s): S. Das Sarma, Amit Nag, and Jay D. Sau We consider a simple conceptual question with respect to Majorana zero modes in semiconductor nanowires: can the measured nonideal values of the zero-bias-conductance-peak in the tunneling experiments be used as a characteristic to predict the underlying topological nature of the proximity induced n… [Phys. Rev. B 94, 035143] Published Wed Jul 20, 2016

Keywords: Electronic structure and strongly correlated systems

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Stern-Gerlach splitters for lattice quasispin (2016)

A. S. Rosado, J. A. Franco-Villafañe, C. Pineda, and E. Sadurní

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-22

Description: Author(s): A. S. Rosado, J. A. Franco-Villafañe, C. Pineda, and E. Sadurní We design a Stern-Gerlach apparatus that separates quasispin components on the lattice, without the use of external fields. The effect is engineered using intrinsic parameters, such as hopping amplitudes and on-site potentials. A theoretical description of the apparatus relying on a generalized Fold… [Phys. Rev. B 94, 045129] Published Thu Jul 21, 2016

Keywords: Electronic structure and strongly correlated systems

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Importance of effective dimensionality in manganese pnictides (2016)

Manuel Zingl, Elias Assmann, Priyanka Seth, Igor Krivenko, and Markus Aichhorn

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-22

Description: Author(s): Manuel Zingl, Elias Assmann, Priyanka Seth, Igor Krivenko, and Markus Aichhorn In this paper we investigate the two manganese pnictides BaMn 2 As 2 and LaMnAsO, using fully charge self-consistent density functional plus dynamical mean-field theory calculations. These systems have a nominally half-filled d shell, and as a consequence, electronic correlations are strong, placing th… [Phys. Rev. B 94, 045130] Published Thu Jul 21, 2016

Keywords: Electronic structure and strongly correlated systems

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Nature of charge density waves and superconductivity in 1T−TaSe_{2−x} Te_{x} (2016)

Y. Liu (刘育), D. F. Shao (邵定夫), L. J. Li, W. J. Lu, X. D. Zhu, P. Tong, R. C. Xiao, L. S. Ling, C. Y. Xi, L. Pi, H. F. Tian, H. X. Yang, J. Q. Li, W. H. Song, X. B. Zhu, and Y. P. Sun

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-22

Description: Author(s): Y. Liu (刘育), D. F. Shao (邵定夫), L. J. Li, W. J. Lu, X. D. Zhu, P. Tong, R. C. Xiao, L. S. Ling, C. Y. Xi, L. Pi, H. F. Tian, H. X. Yang, J. Q. Li, W. H. Song, X. B. Zhu, and Y. P. Sun Transition-metal dichalcogenides (TMDs) M X 2 ( M = Ti , Nb , Ta ; X = S , Se , Te ) exhibit a rich set of charge density wave (CDW) orders, which usually coexist and/or compete with superconductivity. The mechanisms of CDWs and superconductivity in TMDs are still under debate. Here we perform an investigation on a t… [Phys. Rev. B 94, 045131] Published Thu Jul 21, 2016

Keywords: Electronic structure and strongly correlated systems

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Nonreciprocal optical properties in resonant hybrid photonic crystals (2016)

A. D'Andrea and N. Tomassini

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-23

Description: Author(s): A. D'Andrea and N. Tomassini The present work is devoted to the theoretical study of the nonreciprocal optical properties in hybrid (isotropic and anisotropic) periodic multilayers for photon energy values chosen close to the electronic energy gaps of semiconductors (excitons). The optical properties of these resonant nonmagnet… [Phys. Rev. A 94, 013840] Published Fri Jul 22, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Filtration and extraction of quantum states from classical inputs (2016)

Chang-Ling Zou, Liang Jiang, Xu-Bo Zou, and Guang-Can Guo

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-26

Description: Author(s): Chang-Ling Zou, Liang Jiang, Xu-Bo Zou, and Guang-Can Guo We propose using a nonlinear Mach-Zehnder interferometer (NMZI) to efficiently prepare photonic quantum states from a classical input. We first analytically investigate the simple NMZI that can filtrate a single-photon state from weak coherent state by preferentially blocking a two-photon component.… [Phys. Rev. A 94, 013841] Published Mon Jul 25, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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X-ray photon pairs with highly suppressed background (2016)

D. Borodin, A. Schori, F. Zontone, and S. Shwartz

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-26

Description: Author(s): D. Borodin, A. Schori, F. Zontone, and S. Shwartz We describe an experiment demonstrating the possibility to generate collinear indistinguishable x-ray photon pairs with a highly suppressed background. By choosing angles near 90 degrees between the detectors and the pump beam, where the pump polarization is in the scattering plane, we improve the s… [Phys. Rev. A 94, 013843] Published Mon Jul 25, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Valley contrasting in epitaxial growth of In/Tl homoatomic monolayer with anomalous Nernst conductance (2016)

Jian Zhou, Chengxi Huang, Erjun Kan, and Puru Jena

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-26

Description: Author(s): Jian Zhou, Chengxi Huang, Erjun Kan, and Puru Jena Over the past few years, various valleytronic properties have been predicted in graphene like p -electron honeycomb structures with staggered sublattice onsite potential; however, most of these studies are based on model calculations, and direct studies on real materials are still rare. In this paper… [Phys. Rev. B 94, 035151] Published Mon Jul 25, 2016

Keywords: Electronic structure and strongly correlated systems

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Signatures of topological quantum phase transitions in driven and dissipative qubit arrays (2016)

Y. L. Dong, Titus Neupert, R. Chitra, and Sebastian Schmidt

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-26

Description: Author(s): Y. L. Dong, Titus Neupert, R. Chitra, and Sebastian Schmidt We study photonic signatures of symmetry broken and topological phases in a driven, dissipative circuit QED realization of spin-1/2 chains. Specifically, we consider the transverse-field XY model and a dual model with three-spin interactions. The former has a ferromagnetic and a paramagnetic phase, … [Phys. Rev. B 94, 035441] Published Mon Jul 25, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Intrinsic carrier scattering mechanism in anatase TiO_{2} investigated by ultraviolet-pump terahertz-probe spectroscopy (2016)

Y. Matsui, T. Terashige, R. Uchida, T. Miyamoto, H. Yada, H. Matsuzaki, B.-S. Li, A. Sawa, and H. Okamoto

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-26

Description: Author(s): Y. Matsui, T. Terashige, R. Uchida, T. Miyamoto, H. Yada, H. Matsuzaki, B.-S. Li, A. Sawa, and H. Okamoto We measured the optical conductivity σ ̃ ( ω ) spectra caused by photocarriers in anatase Ti O 2 by applying ultraviolet-pump terahertz-probe spectroscopy on epitaxially grown thin films. Drude model analyses of σ ̃ ( ω ) spectra reveal that, in the terahertz region, the reduced mass ( m ̂ ) of the carriers is g… [Phys. Rev. B 94, 041113(R)] Published Mon Jul 25, 2016

Keywords: Electronic structure and strongly correlated systems

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Multiple Fermi surfaces in superconducting Nb-doped Bi_{2} Se_{3} (2016)

B. J. Lawson, Paul Corbae, Gang Li, Fan Yu, Tomoya Asaba, Colin Tinsman, Y. Qiu, J. E. Medvedeva, Y. S. Hor, and Lu Li

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-26

Description: Author(s): B. J. Lawson, Paul Corbae, Gang Li, Fan Yu, Tomoya Asaba, Colin Tinsman, Y. Qiu, J. E. Medvedeva, Y. S. Hor, and Lu Li Topological insulator Bi 2 Se 3 has shown a number of interesting physical properties. Doping Bi 2 Se 3 with copper or strontium has been demonstrated to make the material superconducting and potentially even a topological superconductor. The recent discovery of superconducting niobium-doped Bi 2 Se 3 reveal… [Phys. Rev. B 94, 041114(R)] Published Mon Jul 25, 2016

Keywords: Electronic structure and strongly correlated systems

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Negative dynamic conductivity of a current-driven array of graphene nanoribbons (2016)

S. A. Mikhailov, N. A. Savostianova, and A. S. Moskalenko

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-26

Description: Author(s): S. A. Mikhailov, N. A. Savostianova, and A. S. Moskalenko We consider a periodic array of graphene nanoribbons under the action of a strong dc electric field E 0 and an external electromagnetic excitation with the frequency ω and the lateral wave vector q . Solving the quasiclassical Boltzmann kinetic equation and calculating the surface dynamic conductivity… [Phys. Rev. B 94, 035439] Published Mon Jul 25, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Effects of oxygen contamination on monolayer GeSe: A computational study (2016)

I. S. S. de Oliveira and R. Longuinhos

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-26

Description: Author(s): I. S. S. de Oliveira and R. Longuinhos Natural oxidation is a common degradation mechanism of both mechanical and electronic properties for most of the new two-dimensional materials. From another perspective, controlled oxidation is an option for tuning material properties, thereby expanding possibilities for real-world applications. Und… [Phys. Rev. B 94, 035440] Published Mon Jul 25, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Relaxation times and charge conductivity of silicene (2016)

Azadeh Mazloom, Fariborz Parhizgar, Saeed H. Abedinpour, and Reza Asgari

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-27

Description: Author(s): Azadeh Mazloom, Fariborz Parhizgar, Saeed H. Abedinpour, and Reza Asgari We investigate the transport and single particle relaxation times of silicene in the presence of neutral and charged impurities. The static charge conductivity is studied using the semiclassical Boltzmann formalism when the spin-orbit interaction is taken into account. The screening is modeled withi… [Phys. Rev. B 94, 035153] Published Tue Jul 26, 2016

Keywords: Electronic structure and strongly correlated systems

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Chiral symmetry breaking in a microring optical cavity by engineered dissipation (2016)

Fang-Jie Shu, Chang-Ling Zou, Xu-Bo Zou, and Lan Yang

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-29

Description: Author(s): Fang-Jie Shu, Chang-Ling Zou, Xu-Bo Zou, and Lan Yang We propose a method to break the chiral symmetry of light in traveling wave resonators by coupling the optical modes to a lossy channel. Through the engineered dissipation, an indirect dissipative coupling between two oppositely propagating modes can be realized. Combined with reactive coupling, it … [Phys. Rev. A 94, 013848] Published Thu Jul 28, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Diffraction of plane waves by a periodic array of nonlinear circular cylinders (2016)

Lijun Yuan and Ya Yan Lu

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-29

Description: Author(s): Lijun Yuan and Ya Yan Lu It is well known that standing waves, as special bound states in the radiation continuum, may exist on a periodic array of dielectric cylinders at a discrete set of frequencies if the medium is linear. Recent numerical studies indicate that nonlinear standing waves could exist continuously with resp… [Phys. Rev. A 94, 013852] Published Thu Jul 28, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Schwinger boson spin-liquid states on square lattice (2016)

Xu Yang and Fa Wang

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-29

Description: Author(s): Xu Yang and Fa Wang We study possible spin liquids on square lattice that respect all lattice symmetries and time-reversal symmetry within the framework of Schwinger boson (mean-field) theory. Such spin liquids have spin gap and emergent Z 2 gauge field excitations. We classify them by the projective symmetry group meth… [Phys. Rev. B 94, 035160] Published Thu Jul 28, 2016

Keywords: Electronic structure and strongly correlated systems

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Magnetic edge states and magnetotransport in graphene antidot barriers (2016)

M. R. Thomsen, S. R. Power, A.-P. Jauho, and T. G. Pedersen

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-29

Description: Author(s): M. R. Thomsen, S. R. Power, A.-P. Jauho, and T. G. Pedersen Magnetic fields are often used for characterizing transport in nanoscale materials. Recent magnetotransport experiments have demonstrated that ballistic transport is possible in graphene antidot lattices (GALs). These experiments have inspired the present theoretical study of GALs in a perpendicular… [Phys. Rev. B 94, 045438] Published Thu Jul 28, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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In situ x-ray scattering study of Ag island growth on Si(111)7×7 (2016)

Yiyao Chen, M. W. Gramlich, S. T. Hayden, and P. F. Miceli

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-29

Description: Author(s): Yiyao Chen, M. W. Gramlich, S. T. Hayden, and P. F. Miceli We report on the epitaxial relationship between Ag and the Si(111) 7 × 7 substrate where the wetting layer and the emergence of islands was investigated using in situ x-ray scattering with a combination of grazing incidence diffraction, specular reflectivity, and crystal truncation rod measurements. Th… [Phys. Rev. B 94, 045437] Published Thu Jul 28, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Electronic structure of interfaces between hexagonal and rhombohedral graphite (2016)

M. Taut and K. Koepernik

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-29

Description: Author(s): M. Taut and K. Koepernik An analysis of the electronic structure of interfaces between hexagonal ( A B ) and rhombohedral ( A B C ) graphite based on density functional theory is presented. Both of the two simplest interface structures host (localized) interface bands, which are located around the K point in the Brillouin zone, an… [Phys. Rev. B 94, 035446] Published Thu Jul 28, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Enhanced high-order-harmonic generation and wave mixing via two-color multiphoton excitation of atoms and molecules (2016)

H. K. Avetissian, B. R. Avchyan, and G. F. Mkrtchian

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-30

Description: Author(s): H. K. Avetissian, B. R. Avchyan, and G. F. Mkrtchian We consider harmonics generation and wave mixing by two-color multiphoton resonant excitation of three-level atoms and molecules in strong laser fields. The coherent part of the spectra corresponding to multicolor harmonics generation is investigated. The obtained analytical results on the basis of … [Phys. Rev. A 94, 013856] Published Fri Jul 29, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Quantum-optical model for the dynamics of high-order-harmonic generation (2016)

Ákos Gombkötő, Attila Czirják, Sándor Varró, and Péter Földi

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-30

Description: Author(s): Ákos Gombkötő, Attila Czirják, Sándor Varró, and Péter Földi We investigate a two-level atom in the field of a strong laser pulse. The resulting time-dependent polarization is the source of a radiation the frequency components of which are essentially harmonics of the driving field's carrier frequency. The time evolution of this secondary radiation is analyze… [Phys. Rev. A 94, 013853] Published Fri Jul 29, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Spontaneous emission and the operation of invisibility cloaks (2016)

Mina Morshed Behbahani, Ehsan Amooghorban, and Ali Mahdifar

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-30

Description: Author(s): Mina Morshed Behbahani, Ehsan Amooghorban, and Ali Mahdifar As a probe to explore the ability of invisibility cloaks to conceal objects in the quantum mechanics domain, we study the spontaneous emission rate of an excited two-level atom in the vicinity of an ideal invisibility cloaking. On this base, first, a canonical quantization scheme is presented for th… [Phys. Rev. A 94, 013854] Published Fri Jul 29, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Origin of ellipticity of high-order harmonics generated by a two-color laser field in the cross-polarized configuration (2016)

S. Stremoukhov, A. Andreev, B. Vodungbo, P. Salières, B. Mahieu, and G. Lambert

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-30

Description: Author(s): S. Stremoukhov, A. Andreev, B. Vodungbo, P. Salières, B. Mahieu, and G. Lambert Recently several techniques demonstrated the production of elliptically polarized high harmonics. One of these techniques consists of the interaction in a noble gas of two-color laser beams having orthogonal linear polarizations. Here we present the theoretical explanation of such a result observed … [Phys. Rev. A 94, 013855] Published Fri Jul 29, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Non-Fermi-liquid magic angle effects in high magnetic fields (2016)

A. G. Lebed

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-30

Description: Author(s): A. G. Lebed We investigate a theoretical problem of electron-electron interactions in an inclined magnetic field in a quasi-one-dimensional (Q1D) conductor. We show that they result in strong non-Fermi-liquid corrections to a specific heat, provided that the direction of the magnetic field is far from the so-ca… [Phys. Rev. B 94, 035162] Published Fri Jul 29, 2016

Keywords: Electronic structure and strongly correlated systems

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Computational simulation of subatomic-resolution AFM and STM images for graphene/hexagonal boron nitride heterostructures with intercalated defects (2016)

Junsu Lee, Minjung Kim, James R. Chelikowsky, and Gunn Kim

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-30

Description: Author(s): Junsu Lee, Minjung Kim, James R. Chelikowsky, and Gunn Kim Using ab initio density functional calculations, we predict subatomic-resolution atomic force microscopy (AFM) and scanning tunneling microscopy (STM) images of vertical heterostructures of graphene/hexagonal boron nitride (h-BN) with an intercalated metal atom (Li, K, Cr, Mn, Co, or Cu), and study … [Phys. Rev. B 94, 035447] Published Fri Jul 29, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Optical spectroscopy and ultrafast pump-probe studies on the heavy-fermion compound CePt_{2} In_{7} (2016)

R. Y. Chen, S. J. Zhang, E. D. Bauer, J. D. Thompson, and N. L. Wang

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-30

Description: Author(s): R. Y. Chen, S. J. Zhang, E. D. Bauer, J. D. Thompson, and N. L. Wang We report optical spectroscopy and ultrafast pump-probe measurements on the antiferromagnetic heavy-fermion compound CePt 2 In 7 , a member showing stronger two dimensionality than other compounds in the CeIn 3 -derived heavy-fermion family. We identify clear and typical hybridization spectral structures … [Phys. Rev. B 94, 035161] Published Fri Jul 29, 2016

Keywords: Electronic structure and strongly correlated systems

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Structural order and melting of a quasi-one-dimensional electron system (2016)

David G. Rees, Niyaz R. Beysengulov, Yoshiaki Teranishi, Chun-Shuo Tsao, Sheng-Shiuan Yeh, Shao-Pin Chiu, Yong-Han Lin, Dmitrii A. Tayurskii, Juhn-Jong Lin, and Kimitoshi Kono

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-30

Description: Author(s): David G. Rees, Niyaz R. Beysengulov, Yoshiaki Teranishi, Chun-Shuo Tsao, Sheng-Shiuan Yeh, Shao-Pin Chiu, Yong-Han Lin, Dmitrii A. Tayurskii, Juhn-Jong Lin, and Kimitoshi Kono We investigate the influence of confinement on the positional order of a quasi-1D electron system trapped on the surface of liquid helium. We find evidence that the melting of the Wigner solid (WS) depends on the confinement strength, as well as electron density and temperature. A reentrant solid-li… [Phys. Rev. B 94, 045139] Published Fri Jul 29, 2016

Keywords: Electronic structure and strongly correlated systems

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Quasiparticle lifetime broadening in resonant x-ray scattering of NH_{4} NO_{3} (2016)

John Vinson, Terrence Jach, Matthias Müller, Rainer Unterumsberger, and Burkhard Beckhoff

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-30

Description: Author(s): John Vinson, Terrence Jach, Matthias Müller, Rainer Unterumsberger, and Burkhard Beckhoff It has been previously shown that two effects cause dramatic changes in the x-ray absorption and emission spectra from the N K edge of the insulating crystal ammonium nitrate. First, vibrational disorder causes major changes in the absorption spectrum, originating not only from the thermal populatio… [Phys. Rev. B 94, 035163] Published Fri Jul 29, 2016

Keywords: Electronic structure and strongly correlated systems

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Radiative coupling of A and B excitons in ZnO (2016)

Takashi Kinoshita and Hajime Ishihara

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-30

Description: Author(s): Takashi Kinoshita and Hajime Ishihara Radiation-induced coupling between A and B excitons in ZnO is theoretically studied. Considering the center-of-mass motion of excitons in bulk and thin-film structures, we calculate the eigenmodes of an exciton–radiation coupled system and reveal the ratio of each excitonic component in the respecti… [Phys. Rev. B 94, 045441] Published Fri Jul 29, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Epitaxially stabilized iron thin films via effective strain relief from steps (2016)

T. Miyamachi, S. Nakashima, S. Kim, N. Kawamura, Y. Tatetsu, Y. Gohda, S. Tsuneyuki, and F. Komori

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-30

Description: Author(s): T. Miyamachi, S. Nakashima, S. Kim, N. Kawamura, Y. Tatetsu, Y. Gohda, S. Tsuneyuki, and F. Komori The growth and electronic structures of about 7 monolayer-thick Fe thin films on a vicinal Cu(001) surface have been investigated by scanning tunneling microscopy. We find from atomically resolved observations that the Fe epitaxial fcc(001) lattice is stabilized near the step edges, while several ki… [Phys. Rev. B 94, 045439] Published Fri Jul 29, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Linear scaling approach for atomistic calculation of excitonic properties of 10-million-atom nanostructures (2016)

Piotr T. Różański and Michał Zieliński

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-30

Description: Author(s): Piotr T. Różański and Michał Zieliński Numerical calculations of excitonic properties of novel nanostructures, such as nanowire and crystal phase quantum dots, must combine atomistic accuracy with an approachable computational complexity. The key difficulty comes from the fact that excitonic spectra details arise from atomic-scale contri… [Phys. Rev. B 94, 045440] Published Fri Jul 29, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Zero-energy modes and valley asymmetry in the Hofstadter spectrum of bilayer graphene van der Waals heterostructures with hBN (2016)

Xi Chen, J. R. Wallbank, M. Mucha-Kruczyński, E. McCann, and V. I. Fal'ko

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-30

Description: Author(s): Xi Chen, J. R. Wallbank, M. Mucha-Kruczyński, E. McCann, and V. I. Fal'ko We investigate the magnetic minibands of a heterostructure consisting of bilayer graphene (BLG) and hexagonal boron nitride (hBN) by numerically diagonalizing a two-band Hamiltonian that describes electrons in BLG in the presence of a moiré potential. Due to inversion-symmetry breaking characteristi… [Phys. Rev. B 94, 045442] Published Fri Jul 29, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Topological phase and edge states dependence of the RKKY interaction in zigzag silicene nanoribbon (2016)

Moslem Zare, Fariborz Parhizgar, and Reza Asgari

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-30

Description: Author(s): Moslem Zare, Fariborz Parhizgar, and Reza Asgari We propose versatile materials based on the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in a zigzag silicene nanoribbon (ZSNR) on half filling in the presence of an out-of-plane electric field. We show that the topological phase transition in the band dispersion of ZSNR can be probed by using t… [Phys. Rev. B 94, 045443] Published Fri Jul 29, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Quantum frequency conversion and strong coupling of photonic modes using four-wave mixing in integrated microresonators (2016)

Z. Vernon, M. Liscidini, and J. E. Sipe

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-08-03

Description: Author(s): Z. Vernon, M. Liscidini, and J. E. Sipe Single-photon-level quantum frequency conversion has recently been demonstrated using silicon nitride microring resonators. The resonance enhancement offered by such systems enables high-efficiency translation of quantum states of light across wide frequency ranges at subwatt pump powers. We present… [Phys. Rev. A 94, 023810] Published Tue Aug 02, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Floquet approach to bichromatically driven cavity-optomechanical systems (2016)

Daniel Malz and Andreas Nunnenkamp

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-08-03

Description: Author(s): Daniel Malz and Andreas Nunnenkamp We develop a Floquet approach to solve time-periodic quantum Langevin equations in the steady state. We show that two-time correlation functions of system operators can be expanded in a Fourier series and that a generalized Wiener–Khinchin theorem relates the Fourier transform of their zeroth Fourie… [Phys. Rev. A 94, 023803] Published Mon Aug 01, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Crossover from retro to specular Andreev reflections in bilayer graphene (2016)

Dmitri K. Efetov and Konstantin B. Efetov

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-08-03

Description: Author(s): Dmitri K. Efetov and Konstantin B. Efetov Ongoing experimental progress in the preparation of ultraclean graphene/superconductor (SC) interfaces enabled the recent observation of specular interband Andreev reflections (ARs) at bilayer graphene ( BLG ) / NbSe 2 van der Waals interfaces [Efetov et al. , Nat. Phys. 12 , 328 (2016) ]. Motivated by this… [Phys. Rev. B 94, 075403] Published Tue Aug 02, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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84

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Valley-dependent band structure and valley polarization in periodically modulated graphene (2016)

Wei-Tao Lu

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-08-03

Description: Author(s): Wei-Tao Lu The valley-dependent energy band and transport property of graphene under a periodic magnetic-strained field are studied, where the time-reversal symmetry is broken and the valley degeneracy is lifted. The considered superlattice is composed of two different barriers, providing more degrees of freed… [Phys. Rev. B 94, 085403] Published Tue Aug 02, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Free-standing electronic character of monolayer MoS_{2} in van der Waals epitaxy (2016)

Ho; Kwon Kim (김호권), Dumitru Dumcenco, Mathieu Frégnaux, Anass Benayad, Ming-Wei Chen, Yen-Cheng Kung, Andras Kis, and Olivier Renault

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-08-03

Description: Author(s): HoKwon Kim (김호권), Dumitru Dumcenco, Mathieu Frégnaux, Anass Benayad, Ming-Wei Chen, Yen-Cheng Kung, Andras Kis, and Olivier Renault We have evaluated as-grown Mo S 2 crystals, epitaxially grown on a monocrystalline sapphire by chemical vapor deposition (CVD), with direct electronic band-structure measurements by energy-filtered k -space photoelectron emission microscopy performed with a conventional laboratory vacuum ultraviolet He… [Phys. Rev. B 94, 081401(R)] Published Mon Aug 01, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Room-temperature magnetism on the zigzag edges of phosphorene nanoribbons (2016)

Guang Yang, Shenglong Xu, Wei Zhang, Tianxing Ma, and Congjun Wu

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-08-04

Description: Author(s): Guang Yang, Shenglong Xu, Wei Zhang, Tianxing Ma, and Congjun Wu Searching for room-temperature ferromagnetic semiconductors has evolved into a broad field of material science and spintronics for decades, nevertheless, these novel states remain rare. Phosphorene, a monolayer black phosphorus with a puckered honeycomb lattice structure possessing a finite band gap… [Phys. Rev. B 94, 075106] Published Wed Aug 03, 2016

Keywords: Electronic structure and strongly correlated systems

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Long-range orders and spin/orbital freezing in the two-band Hubbard model (2016)

Karim Steiner, Shintaro Hoshino, Yusuke Nomura, and Philipp Werner

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-08-04

Description: Author(s): Karim Steiner, Shintaro Hoshino, Yusuke Nomura, and Philipp Werner We solve the orbitally degenerate two-band Hubbard model within dynamical mean field theory and map out the instabilities to various symmetry-broken phases based on an analysis of the corresponding lattice susceptibilities. Phase diagrams as a function of the Hund coupling parameter J are obtained b… [Phys. Rev. B 94, 075107] Published Wed Aug 03, 2016

Keywords: Electronic structure and strongly correlated systems

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Piezoelectricity in planar boron nitride via a geometric phase (2016)

Matthias Droth, Guido Burkard, and Vitor M. Pereira

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-08-04

Description: Author(s): Matthias Droth, Guido Burkard, and Vitor M. Pereira Due to their low surface mass density, two-dimensional materials with a strong piezoelectric response are interesting for nanoelectromechanical systems with high force sensitivity. Unlike graphene, the two sublattices in a monolayer of hexagonal boron nitride (hBN) are occupied by different elements… [Phys. Rev. B 94, 075404] Published Wed Aug 03, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Crystalline and electronic structure of single-layer TaS_{2} (2016)

Charlotte E. Sanders, Maciej Dendzik, Arlette S. Ngankeu, Andreas Eich, Albert Bruix, Marco Bianchi, Jill A. Miwa, Bjørk Hammer, Alexander A. Khajetoorians, and Philip Hofmann

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-08-04

Description: Author(s): Charlotte E. Sanders, Maciej Dendzik, Arlette S. Ngankeu, Andreas Eich, Albert Bruix, Marco Bianchi, Jill A. Miwa, Bjørk Hammer, Alexander A. Khajetoorians, and Philip Hofmann Single-layer TaS 2 is epitaxially grown on Au(111) substrates. The resulting two-dimensional crystals adopt the 1 H polymorph. The electronic structure is determined by angle-resolved photoemission spectroscopy and found to be in excellent agreement with density functional theory calculations. The sin… [Phys. Rev. B 94, 081404(R)] Published Wed Aug 03, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Ultranarrow resonance in Coulomb drag between quantum wires at coinciding densities (2016)

A. P. Dmitriev, I. V. Gornyi, and D. G. Polyakov

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-08-04

Description: Author(s): A. P. Dmitriev, I. V. Gornyi, and D. G. Polyakov We investigate the influence of the chemical potential mismatch Δ (different electron densities) on Coulomb drag between two parallel ballistic quantum wires. For pair collisions, the drag resistivity ρ D ( Δ ) shows a peculiar anomaly at Δ = 0 with ρ D being finite at Δ = 0 and vanishing at any nonzero Δ . T… [Phys. Rev. B 94, 085404] Published Wed Aug 03, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Strong quantum squeezing near the pull-in instability of a nonlinear beam (2016)

Ali Passian and George Siopsis

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-08-05

Description: Author(s): Ali Passian and George Siopsis Microscopic silicon-based suspended mechanical oscillators, constituting an extremely sensitive force probe, transducer, and actuator, are being increasingly employed in many developing microscopies, spectroscopies, and emerging optomechanical and chem-bio sensors. We predict a significant squeezing… [Phys. Rev. A 94, 023812] Published Thu Aug 04, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Surface-enhanced Raman scattering as a higher-order Raman process (2016)

Niclas S. Mueller, Sebastian Heeg, and Stephanie Reich

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-08-05

Description: Author(s): Niclas S. Mueller, Sebastian Heeg, and Stephanie Reich We propose to understand surface-enhanced Raman scattering (SERS) as a higher-order Raman process that contains the plasmonic excitation. The SERS amplitudes are calculated with third- and fourth-order perturbation theory. Treating the plasmonic excitation as a quasiparticle, we derive analytic expr… [Phys. Rev. A 94, 023813] Published Thu Aug 04, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Modeling of the carrier dynamics in nonlinear semiconductor nanoscale resonators (2016)

Gregory Moille, Sylvain Combrié, and Alfredo De Rossi

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-08-05

Description: Author(s): Gregory Moille, Sylvain Combrié, and Alfredo De Rossi The Green's function formalism is used in order to model the diffusion of free carriers in nonlinear semiconductor nanoscale resonators. In combination with the time-dependent coupled-mode equations, this leads to excellent agreement with measurements carried on a variety of samples and materials, u… [Phys. Rev. A 94, 023814] Published Thu Aug 04, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Enigmatic 12/5 fractional quantum Hall effect (2016)

Kiryl Pakrouski, Matthias Troyer, Yang-Le Wu, Sankar Das Sarma, and Michael R. Peterson

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-08-05

Description: Author(s): Kiryl Pakrouski, Matthias Troyer, Yang-Le Wu, Sankar Das Sarma, and Michael R. Peterson We numerically study the fractional quantum Hall effect at filling factors ν = 12 / 5 and 13/5 (the particle-hole conjugate of 12/5) in high-quality two-dimensional GaAs heterostructures via exact diagonalization including finite well width and Landau-level mixing. We find that Landau-level mixing suppr… [Phys. Rev. B 94, 075108] Published Thu Aug 04, 2016

Keywords: Electronic structure and strongly correlated systems

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T/B scaling without quasiparticle mass divergence: YbCo_{2} Ge_{4} (2016)

Akito Sakai, Kentaro Kitagawa, Kazuyuki Matsubayashi, Makoto Iwatani, and Philipp Gegenwart

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-09

Description: Author(s): Akito Sakai, Kentaro Kitagawa, Kazuyuki Matsubayashi, Makoto Iwatani, and Philipp Gegenwart “Strange metal phases”, displaying strong deviations from Fermi liquid theory, are discussed in the context of cuprates, itinerant magnets, or heavy-fermion metals. Several Yb-based materials, e.g., β -YbAlB 4 or the Au-Al-Yb quasicrystal, display T / B scaling of magnetic and thermodynamic properties. This has been taken as evidence for zero-field quantum criticality without requirement to fine-tune composition and pressure. However, it appears unlikely that materials are accidentally located at such a special point in multidimensional phase space. In this paper, the authors demonstrate by a thermodynamic study on the new Kondo lattice compound YbCo 2 Ge 4 that T / B scaling and a divergence of the magnetic Grquot{u}neisen parameter can arise without a quasiparticle mass divergence and in the absence of zero-field quantum criticality. They discuss alternative scenarios for such strange metal behavior. [Phys. Rev. B 94, 041106(R)] Published Fri Jul 08, 2016

Keywords: Electronic structure and strongly correlated systems

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Magnetic quantization of sp^{3} bonding in monolayer gray tin (2016)

Szu-Chao Chen, Chung-Lin Wu, Jhao-Ying Wu, and Ming-Fa Lin

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-09

Description: Author(s): Szu-Chao Chen, Chung-Lin Wu, Jhao-Ying Wu, and Ming-Fa Lin A generalized tight-binding model, which is based on the subenvelope functions of the different sublattices, is developed to explore the novel magnetic quantization in monolayer gray tin (tinene). The effects due to the s p 3 bonding, the spin-orbital coupling, the magnetic field, and the electric fie… [Phys. Rev. B 94, 045410] Published Fri Jul 08, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Spectrally dependent fluctuations of thermal photon sources (2016)

K. Olson and J. Talghader

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2016-07-12

Description: Author(s): K. Olson and J. Talghader Many current quantum optical systems, such as microcavities, interact with thermal light through a small number of widely separated modes. Previous theories for photon number fluctuations of thermal light have been primarily limited to special cases that are appropriate for large volumes or distance… [Phys. Rev. A 94, 013822] Published Mon Jul 11, 2016

Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics

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Electric-field-induced insulator to Coulomb glass transition via oxygen-vacancy migration in Ca-doped BiFeO_{3} (2016)

Ji Soo Lim, Jin Hong Lee, Atsushi Ikeda-Ohno, Takuo Ohkochi, Ki-Seok Kim, Jan Seidel, and Chan-Ho Yang

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-12

Description: Author(s): Ji Soo Lim, Jin Hong Lee, Atsushi Ikeda-Ohno, Takuo Ohkochi, Ki-Seok Kim, Jan Seidel, and Chan-Ho Yang The multiferroic BiFe O 3 (BFO) as a charge-transfer-type insulator is an interesting system in which to explore correlated electronic conduction. Here, we substitute divalent Ca ions into the parent BFO and apply an external electric field at elevated temperatures to spatially redistribute spontaneou… [Phys. Rev. B 94, 035123] Published Mon Jul 11, 2016

Keywords: Electronic structure and strongly correlated systems

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Band alignment of two-dimensional semiconductors for designing heterostructures with momentum space matching (2016)

V. Ongun Özçelik, Javad G. Azadani, Ce Yang, Steven J. Koester, and Tony Low

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-12

Description: Author(s): V. Ongun Özçelik, Javad G. Azadani, Ce Yang, Steven J. Koester, and Tony Low We present a comprehensive study of the band alignments of two-dimensional (2D) semiconducting materials and highlight the possibilities of forming momentum-matched type I, II, and III heterostructures, an enticing possibility being atomic heterostructures where the constituent monolayers have band … [Phys. Rev. B 94, 035125] Published Mon Jul 11, 2016

Keywords: Electronic structure and strongly correlated systems

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Theoretical study of plasmonic lasing in junctions with many molecules (2016)

Yuan Zhang, Klaus Mølmer, and Volkhard May

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2016-07-12

Description: Author(s): Yuan Zhang, Klaus Mølmer, and Volkhard May We calculate the quantum state of the plasmon field excited by an ensemble of molecular emitters, which are driven by exchange of electrons with metallic nanoparticle electrodes. Assuming identical emitters that are coupled collectively to the plasmon mode but are otherwise subject to independent re… [Phys. Rev. B 94, 045412] Published Mon Jul 11, 2016

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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