http://prb.aps.org/ Accepted Papers for Physical Review B en-us Copyright (c) 2009 The American Physical Society 2009-11-07T07:05:03-05:00 assocpub@aps.org rss@aps.org hourly 4 2009-11-07T07:05:03-05:00 rss@aps.org http://prb.aps.org/accepted/L/a307eYf6S4d13e29b48673334df14f85bf96b3b9c Low-energy electronic structure of (unbiased and undoped) bilayer graphene consists of two Fermi points with quadratic dispersions if trigonal-warping is ignored. We show that a short-range (or screened Coulomb) interactions are marginally relevant and use renormalization group to study their effect... Oskar Vafek and Kun Yang 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Surface physics, low-dimensional systems, and related topics Surface physics, low-dimensional systems, and related topics http://prb.aps.org/accepted/B/81076O26Ua51411ce4a2016498f80a07c5ecf31aa Recent studies suggest that the carbon-alloy catalyst (CAC) with doped nitrogen may be a powerful candidate for cathode catalyst of fuel cell. In this paper, we aim to clarify the microscopic mechanisms of the enhancement in the catalyst activity caused by nitrogen doping using a simple graphene clu... ShengFeng Huang, Kiyoyuki Terakura, Taisuke Ozaki, Takashi Ikeda, Mauro Boero, Masaharu Oshima, Junichi Ozaki and Seizo Miyata 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Surface physics, low-dimensional systems, and related topics Surface physics, low-dimensional systems, and related topics http://prb.aps.org/accepted/B/cf076OadT601f711630b84f20ebded532409e8ff2 A systematic investigation of ferromagnetic resonance (FMR) was carried out on Ga1 - xMnxAs layers synthesized by Mn ion implantation into GaAs followed by pulsed-laser melting (II-PLM). Angular and temperature dependences of FMR were measured on layers prepared on GaAs (001), (110), and (311) surfa... Y. Y. Zhou, X. Liu, J. K. Furdyna, M. A. Scarpulla and O. D. Dubon 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Magnetism Magnetism http://prb.aps.org/accepted/B/54076O1dRa615017a3e551a8724dec9200503a6b0 In fractional quantum Hall systems, quasiparticles of fractional charge can tunnel between the edges at a quantum point contact. Such tunneling (or backscattering) processes contribute to charge transport, and provide information on both the charge and statistics of the quasiparticles involved. Here... Hua Chen, ZiX Huiang, Kun Yang, E. H. Rezayi and Xin Wan 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Semiconductors II: surfaces, interfaces, microstructures, and related topics Semiconductors II: surfaces, interfaces, microstructures, and related topics http://prb.aps.org/accepted/L/7607fYd3Nb11942e54606513ad3918556d57b0cbb We have used the diffusion quantum Monte Carlo methodto calculate the energy band of the two-dimensional homogeneous electron gas (HEG), and hence we have obtained the quasiparticle effective mass and the occupied bandwidth. We find that the effective mass in the paramagnetic HEG increases significa... N. D. Drummond and R. J. Needs 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Electronic structure: wide-band, narrow-band, and strongly correlated systems Electronic structure: wide-band, narrow-band, and strongly correlated systems http://prb.aps.org/accepted/L/3c072Y38T531d22c93333294dd8ba87d7cd082087 We use two-beam second-harmonic generation to separate the surface (electric-dipole origin) and bulk (magnetic-dipole and electric-quadrupole origin) contributions to the second-order nonlinear optical response of an isotropic gold film. The bulk response is unambiguously ob- served and explained by... Fu Xiang Wang, Francisco J. Rodriguez, Willem M. Albers, Risto Ahorinta, J. E. Sipe and Martti Kauranen 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Surface physics, low-dimensional systems, and related topics Surface physics, low-dimensional systems, and related topics http://prb.aps.org/accepted/L/9a071Y03Qa81392467527df017f3dc962b2dff04a Pressure modulation of a weak shock wave induced by an Nd:YAG laser pulse when passing across a turbulent slit jet was experimentally investigated. With the slit jet the peak overpressure became smaller on an average by 12 %, with a standard deviation being 27 %. Clear relationships between an overp... Xiang Xiong, WeiHua Sun, YongJun Bao, RuWen Peng, Mu Wang, Cheng Sun, Xia Lung, Jun Shao, Zhi Li Feng and NaiBen Ming 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Electronic structure: wide-band, narrow-band, and strongly correlated systems Electronic structure: wide-band, narrow-band, and strongly correlated systems http://prb.aps.org/accepted/B/8d075O9cXb3Ec519419c3b28b7c8795d4b04e6c67 We report the discovery of a binary icosahedral phase in a Sc-Zn alloy obtained through solution-growth, producing millimeter-sized, facetted, single grain, quasicrystals that exhibit different growth morphologies, pentagonal dodecahedra and rhombic triacontahedra, under only marginally different gr... P. C. Canfield, M. Claudel, C.S Ho., A. Kreyssig, S. Nandi, M. G. Kim, X. Lin, A. Kracher, K. W. Dennis, R. W. McCallum and A. I. Goldman 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Inhomogeneous, disordered, and partially ordered systems Inhomogeneous, disordered, and partially ordered systems http://prb.aps.org/accepted/B/a7079O7eT401891d71a815443c4616673d50e430f Here, we describe a first principles derivation of the macroscopic Poynting vector, heating rate, and stored energy in arbitrary composite media formed by dielectric and metallic inclusions, taking into account the effects of artificial magnetism, bianisotropy, as well as spatial dispersion. Startin... M. G. Silveirinha 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Electronic structure: wide-band, narrow-band, and strongly correlated systems Electronic structure: wide-band, narrow-band, and strongly correlated systems http://prb.aps.org/accepted/L/17076Ya3Ub818617791357d6a0a68087b9b18759a We study finite temperature properties of a generic spin-orbital model relevant to transition metal compounds, having coupled quantum Heisenberg-spin and Ising-orbital degrees of freedom. The model system undergoes a phase transition, consistent with that of a 2D Ising model, to an orbitally ordered... C. C. Chen, B. Moritz, J. van den Brink, T. P. Devereaux and R. R. P. Singh 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Magnetism Magnetism http://prb.aps.org/accepted/B/8307fO03Led155060635693521caa4745bbed669c Thermodynamics of tip-induced nanodomain formation in scanning probe microscopy of ferroelectric films and crystals is studied using the analytical Landau-Ginzburg-Devonshire approach and phase-field modeling. The local redistribution of polarization induced by the biased probe apex is analyzed incl... Anna N. Morozovska, Eugene A. Eliseev, Yul Lian, Sergei V. Svechnikov, Peter Maksymovych, Venkatraman Gopalan, LongQing Chen and Sergei V. Kalinin 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Structure, structural phase transitions, mechanical properties, defects, etc. Structure, structural phase transitions, mechanical properties, defects, etc. http://prb.aps.org/accepted/B/b6074O41W341981131d71dc0475f6252fbb4261ba Single-site dynamical mean field theory is used to determine the magnetic and orbital-ordering phase diagram for a model of electrons moving on a lattice with three orbital states per site and with the fully rotationally invariant Slater-Kanamori on-site interactions. The model captures important as... ChingKit Chan, Philipp Werner and Andrew J. Millis 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Electronic structure: wide-band, narrow-band, and strongly correlated systems Electronic structure: wide-band, narrow-band, and strongly correlated systems http://prb.aps.org/accepted/L/ca077Y75R7f14222b28f107985e4fc78738556f8d We demonstrate the sensitivity of x-ray absorption spectroscopy to hydrogen-bonding using as experimental model system water on Ru(0001). We step-wise go from fully broken to complete H-bond network by varying the morphology from isolated monomers via two-dimensional clusters to a saturated monolaye... D. Nordlund, H. Ogasawara, K. J. Andersson, M. Tatarkhanov, M. Salmeron, L. G. M. Pettersson and A. Nilsson 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Surface physics, low-dimensional systems, and related topics Surface physics, low-dimensional systems, and related topics http://prb.aps.org/accepted/L/c5073Yc8R7d19d22b6835608ef9bdb5a2c371186e The signature of the strong coupling regime is unambiguously evidenced in a GaN-based microcavity (MC) above the polariton lasing threshold Pthr at room temperature through the observation of the upper polariton branch. The MC system exhibits a renormalization of the polariton dispersion curve, name... Raphael Butte, Jacques Levrat, Gabriel Christmann, Eric Feltin, JeanFrancois Carlin and Nicolas Grandjean 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Semiconductors II: surfaces, interfaces, microstructures, and related topics Semiconductors II: surfaces, interfaces, microstructures, and related topics http://prb.aps.org/accepted/B/8a078O07U8e1301ea1305036351bf02f9c00be05f We develop a perturbative approach for calculating, within the quasistatic approximation, the shift of surface resonances in response to a deformation of a dielectric volume. Our strategy is based on the conversion of the homogeneous system for the potential which determines the plasmonic eigenvalue... Daniel Grieser, Hannes Uecker, SvendAge Biehs, Oliver Huth, Felix Ruting and Martin Holthaus 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Surface physics, low-dimensional systems, and related topics Surface physics, low-dimensional systems, and related topics http://prb.aps.org/accepted/B/65079O2bW5e10910943786c8de5011685b9b2668c Magnetoresistance of two-dimensional electron systems with several occupied subbands oscillates owing to periodic modulation of the probability of intersubband transitions by the quantizing magnetic field. In addition to previous investigations of these magneto-intersubband (MIS) oscillations in two... S. Wiedmann, N. C. Mamani, G. M. Gusev, O. E. Raichev, A. K. Bakarov and J. C. Portal 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Semiconductors II: surfaces, interfaces, microstructures, and related topics Semiconductors II: surfaces, interfaces, microstructures, and related topics http://prb.aps.org/accepted/L/18079Y59U491de2c41c61f515150c6f0f06f95f34 Critical factors that control the vacuum work function of the TiCxN1-x ternary system surfaces were determined using detailed density functional theory calculations. Surface chemistry (i.e., orientation, stoichiometry and defect density) was found to play the most important role in determining the w... H. Zhu, M. Aindow and R. Ramprasad 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Surface physics, low-dimensional systems, and related topics Surface physics, low-dimensional systems, and related topics http://prb.aps.org/accepted/B/1907dO20Y11R8a1260642500208684deba52765a3 Christopher L. Henley 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Errata Errata http://prb.aps.org/accepted/B/bc07fOc7Y04Rf313305e18e9246694f745e22267d SeongHoon Jung, Jooyeon Kim, E. J. Choi, Y. Sekio, T. Kimura and J. Lorenzana 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Errata Errata http://prb.aps.org/accepted/B/5d07eOf9U191be0e09456562ed99afd104d80a17e By means of numerical simulation we confirm that in graphene with point defects a quasigap opens in the vicinity of the resonance state with increasing impurity concentration. We prove that states inside this quasigap cannot longer be described by a wavevector and are strongly localized. We visualiz... S. S. Pershoguba, Yu. V. Skrypnyk and V. M. Loktev 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Inhomogeneous, disordered, and partially ordered systems Inhomogeneous, disordered, and partially ordered systems http://prb.aps.org/accepted/B/b5078O9dU321f618142015e70ecc016bb2c528d8f We theoretically study the early stage real time dynamics of the inter-layer s-bond formation by visible light irradiation of graphite crystal. An electron-hole pair, generated as an inter-layer charge transfer excitation in the visible region, mostly dissipates away into the two-dimensional semimet... Keita Nishioka and Keiichiro Nasu 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Surface physics, low-dimensional systems, and related topics Surface physics, low-dimensional systems, and related topics http://prb.aps.org/accepted/B/7a07eOfaWd219a1284f92c363d8775595fdad0e4d We study the magnetization of square and hexagonal graphene dots. It is shown that two classes of hexagonal dots have a second order phase transition at a critical Hubbard energy U, whose value is similar to the one in bulk graphene, albeit the dots do not have a density of states proportional to th... J. Viana Gomes, Vitor M. Pereira and N. M. R. Peres 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Surface physics, low-dimensional systems, and related topics Surface physics, low-dimensional systems, and related topics http://prb.aps.org/accepted/L/8607bYeeT8d16319f2152d88575cd74ee7cba0a35 We study the phase diagram of spin-one polar condensates in a two dimensional optical lattice with magnetic anisotropy. We show that the topological binding of vorticity to nematic disclinations allows for a rich variety of phase transitions. These include Kosterlitz-Thouless-like transitions with a... Daniel Podolsky, Shailesh Chandrasekharan and Ashvin Vishwanath 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Superfluidity and superconductivity Superfluidity and superconductivity http://prb.aps.org/accepted/B/6e075O07RcbW011c71ad14f0666380574eab62766 Znx(ZnO)1-x granular films with nominal atomic concentration of x=0\thicksim1 were prepared by magnetron co-sputtering method. Ferromagnetism is observed in films with 0.04\leqslantx < 0.60. The room-temperature saturated magnetization increases with increasing x and reaches its maximum value of about 3.34 emu/cc at x=0.31. The temperature dependent magnetization curve could be fitted within the framework of Stoner model in a large temperature range from 50 K to 800 K. The obtained Curie temperature is higher than 500 oC. It is found that the main point defects in ZnO are Zn interstatial and oxygen vacancy. Room-temperature photoluminescence analysis and high-temperature x-ray diffraction measurement show a conclusive evidence that the native point defect of Zn interstitial plays a crucial role in the observed magnetic behaviors. By implicating the shallow donor related carriers and/or extending the charge transfer mechanism to metal/semiconductor heterostructure, the result could be qualitatively explained based on the Stoner theory of band magnetism. These findings may help to get a further insight into the ferromagnetic origin in non-magnetic ion doped ZnO systems. X. Zhang, Y. H. Cheng, L.Y Li., Hui Liu, X. Zuo, G. H. Wen, L. Li, R. K. Zheng and S. P. Ringer 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Magnetism Magnetism http://prb.aps.org/accepted/L/b107fY87T7518f23505d8b6440052e088b4ebf9d5 We present in this letter a theoretical analysis of the current-voltage (I-V) characteristics of a hybrid normal-superconducting device consisting of a quantum dot and two electrodes that can be either normal or superconducting. We show that voltage drops at two different contacts that have been reg... Argo Nurbawono, Yuan Ping Feng, Erhai Zhao and Chun Zhang 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review B Superfluidity and superconductivity Superfluidity and superconductivity