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Invisible K_{L} decays as a probe of new physics (2015)

S. N. Gninenko and N. V. Krasnikov

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): S. N. Gninenko and N. V. Krasnikov The decay K L → invisible has never been experimentally tested. In the Standard Model (SM), its branching ratio for the decay into two neutrinos is helicity suppressed and predicted to be Br ( K L → ν ν ¯ ) ≲ 10 − 10 . We consider several natural extensions of the SM, such as two-Higgs-doublet (2HDM), 2HDM and ligh… [Phys. Rev. D 92, 034009] Published Mon Aug 10, 2015

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Analytic Flow Equations for the Fermi Liquid Parameters of the Anderson Impurity Model (2015)

Vassilis Pandis and Alex C. Hewson

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Vassilis Pandis and Alex C. Hewson The low temperature behavior of a Fermi liquid can be described in terms of quasiparticle excitations that are in 1-1 correspondence with those of the noninteracting system. Because of adiabatic continuity, the Landau parameters, which describe the interactions between the quasiparticles, must evolv… [Phys. Rev. Lett. 115, 076401] Published Mon Aug 10, 2015

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B [over ¯] ^{0} decay into D^{0} and f_{0} (500), f_{0} (980), a_{0} (980), ρ and B [over ¯] _{s}^{0} decay into D^{0} and κ(800), K^{*0} (2015)

Wei-Hong Liang, Ju-Jun Xie, and E. Oset

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): Wei-Hong Liang, Ju-Jun Xie, and E. Oset We make predictions for ratios of branching fractions of B ¯ 0 decays into D 0 and the scalar mesons f 0 ( 500 ) , f 0 ( 980 ) , a 0 ( 980 ) , plus B ¯ s 0 decay into D 0 and κ ( 800 ) . We also compare the π + π − production in the scalar channel with that observed in the ρ channel and make predictions for the B ¯ s 0 decay into … [Phys. Rev. D 92, 034008] Published Mon Aug 10, 2015

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Quantum Spin Liquid Emerging from Antiferromagnetic Order by Introducing Disorder (2015)

T. Furukawa, K. Miyagawa, T. Itou, M. Ito, H. Taniguchi, M. Saito, S. Iguchi, T. Sasaki, and K. Kanoda

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): T. Furukawa, K. Miyagawa, T. Itou, M. Ito, H. Taniguchi, M. Saito, S. Iguchi, T. Sasaki, and K. Kanoda Quantum spin liquids, which are spin versions of quantum matter, have been sought after in systems with geometrical frustration. We show that disorder drives a classical magnet into a quantum spin liquid through conducting NMR experiments on an organic Mott insulator, κ − ( ET ) 2 Cu [ N ( CN ) 2 ] Cl . Antiferrom… [Phys. Rev. Lett. 115, 077001] Published Tue Aug 11, 2015

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Diffractive electromagnetic processes from a Regge point of view (2015)

H. G. Dosch and E. Ferreira

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): H. G. Dosch and E. Ferreira The energy dependence of the cross sections for electromagnetic diffractive processes can be well described by a single power, W δ . For J / ψ photoproduction this holds in the range from 20 GeV to 2 TeV. This feature is most easily explained by a single pole in the angular momentum plane which depends … [Phys. Rev. D 92, 034002] Published Mon Aug 03, 2015

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Combined study of 2S and 1D open-charm mesons with natural spin-parity (2015)

Bing Chen, Xiang Liu, and Ailin Zhang

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Bing Chen, Xiang Liu, and Ailin Zhang In this paper, we perform a combined study of 2 S and 1 D open-charm mesons with natural spin-parity. Our results indicate that D 1 * ( 2600 ) / D s 1 * ( 2700 ) and D 1 * ( 2760 ) / D s 1 * ( 2860 ) are predominantly the 2 S 1 3 and 1 D 1 3 charmed/charmed-strange mesons, respectively, while D 3 * ( 2760 ) / D s 3 * ( 2860 ) can be regarded as … [Phys. Rev. D 92, 034005] Published Wed Aug 05, 2015

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Hot-Electron Intraband Luminescence from Single Hot Spots in Noble-Metal Nanoparticle Films (2015)

Tobias Haug, Philippe Klemm, Sebastian Bange, and John M. Lupton

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Tobias Haug, Philippe Klemm, Sebastian Bange, and John M. Lupton Visible light emission from silver and gold nanoparticle films irradiated with ultrashort infrared pulses is governed by hot electron recombination within the conduction band. [Phys. Rev. Lett. 115, 067403] Published Fri Aug 07, 2015

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Tunneling Processes into Localized Subgap States in Superconductors (2015)

Michael Ruby, Falko Pientka, Yang Peng, Felix von Oppen, Benjamin W. Heinrich, and Katharina J. Franke

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): Michael Ruby, Falko Pientka, Yang Peng, Felix von Oppen, Benjamin W. Heinrich, and Katharina J. Franke We combine scanning-tunneling-spectroscopy experiments probing magnetic impurities on a superconducting surface with a theoretical analysis of the tunneling processes between (superconducting) tip and substrate. We show that the current through impurity-induced Shiba bound states is carried by singl… [Phys. Rev. Lett. 115, 087001] Published Thu Aug 20, 2015

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Layered Topological Crystalline Insulators (2015)

Youngkuk Kim, C. L. Kane, E. J. Mele, and Andrew M. Rappe

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): Youngkuk Kim, C. L. Kane, E. J. Mele, and Andrew M. Rappe Topological crystalline insulators (TCIs) are insulating materials whose topological property relies on generic crystalline symmetries. Based on first-principles calculations, we study a three-dimensional (3D) crystal constructed by stacking two-dimensional TCI layers. Depending on the interlayer in… [Phys. Rev. Lett. 115, 086802] Published Thu Aug 20, 2015

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X-ray Detection of Transient Magnetic Moments Induced by a Spin Current in Cu (2015)

R. Kukreja, S. Bonetti, Z. Chen, D. Backes, Y. Acremann, J. A. Katine, A. D. Kent, H. A. Dürr, H. Ohldag, and J. Stöhr

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-25

Beschreibung: Author(s): R. Kukreja, S. Bonetti, Z. Chen, D. Backes, Y. Acremann, J. A. Katine, A. D. Kent, H. A. Dürr, H. Ohldag, and J. Stöhr X-ray magnetic circular dichroism detects the transient magnetic moments that are induced in a nonmagnetic material by spin injection from a ferromagnet. [Phys. Rev. Lett. 115, 096601] Published Mon Aug 24, 2015

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New structures in the proton-antiproton system (2015)

I. T. Lorenz, H.-W. Hammer, and Ulf-G. Meißner

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-19

Beschreibung: Author(s): I. T. Lorenz, H.-W. Hammer, and Ulf-G. Meißner In the most recent measurements of the reaction e + e − → p p ¯ by the BABAR collaboration, new structures have been found with unknown origin. We examine a possible relation of the most distinct peak to the recently observed ϕ ( 2170 ) . Alternatively, we analyze possible explanations due to the nucleon Δ ¯ an… [Phys. Rev. D 92, 034018] Published Tue Aug 18, 2015

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Pseudoscalar mesons with symmetric bound state vertex functions on the light front (2015)

George H. S. Yabusaki, Ishtiaq Ahmed, M. Ali Paracha, J. P. B. C. de Melo, and Bruno El-Bennich

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-19

Beschreibung: Author(s): George H. S. Yabusaki, Ishtiaq Ahmed, M. Ali Paracha, J. P. B. C. de Melo, and Bruno El-Bennich We study the electromagnetic form factors, decay constants and charge radii of the pion and kaon within the framework of light-front field theory formalism where we use an ansatz for the quark-meson interaction bound-state function which is symmetric under exchange of quark and antiquark momentum. T… [Phys. Rev. D 92, 034017] Published Tue Aug 18, 2015

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Hadronic loops versus factorization in effective field theory calculations of X(3872)→χ_{cJ} π^{0} (2015)

Thomas Mehen

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): Thomas Mehen We compare two existing approaches to calculating the decay of molecular quarkonium states to conventional quarkonia in effective field theory, using X ( 3872 ) → χ c J π 0 as an example. In one approach the decay of the molecular quarkonium proceeds through a triangle diagram with charmed mesons in the loop… [Phys. Rev. D 92, 034019] Published Thu Aug 20, 2015

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Refined analysis on the X(3872) resonance (2015)

Ce Meng, Juan José Sanz-Cillero, Meng Shi, De-Liang Yao, and Han-Qing Zheng

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): Ce Meng, Juan José Sanz-Cillero, Meng Shi, De-Liang Yao, and Han-Qing Zheng We study the property of the X ( 3872 ) meson by analyzing the B → K D D ¯ * and B → K J / ψ π + π − decay processes. The competition between the rescattering mediated through a Breit-Wigner resonance and the rescattering generated from a local D D ¯ * → D D ¯ * interaction is carefully studied through an effective Lagrangia… [Phys. Rev. D 92, 034020] Published Fri Aug 21, 2015

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Accessing Phonon Polaritons in Hyperbolic Crystals by Angle-Resolved Photoemission Spectroscopy (2015)

Andrea Tomadin, Alessandro Principi, Justin C. W. Song, Leonid S. Levitov, and Marco Polini

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): Andrea Tomadin, Alessandro Principi, Justin C. W. Song, Leonid S. Levitov, and Marco Polini Recently studied hyperbolic materials host unique phonon-polariton (PP) modes. The ultrashort wavelengths of these modes, as well as their low damping, hold promise for extreme subdiffraction nanophotonics schemes. Polar hyperbolic materials such as hexagonal boron nitride can be used to realize lon… [Phys. Rev. Lett. 115, 087401] Published Fri Aug 21, 2015

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Tracking Primary Thermalization Events in Graphene with Photoemission at Extreme Time Scales (2015)

I. Gierz, F. Calegari, S. Aeschlimann, M. Chávez Cervantes, C. Cacho, R. T. Chapman, E. Springate, S. Link, U. Starke, C. R. Ast, and A. Cavalleri

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): I. Gierz, F. Calegari, S. Aeschlimann, M. Chávez Cervantes, C. Cacho, R. T. Chapman, E. Springate, S. Link, U. Starke, C. R. Ast, and A. Cavalleri Ultrafast dynamics of photoexcited electron-hole pairs produced by subfemtosecond pulses in graphene may have implications for petahertz electronic and optoelectronic devices. [Phys. Rev. Lett. 115, 086803] Published Fri Aug 21, 2015

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Evidence for Half-Metallicity in n-type HgCr_{2} Se_{4} (2015)

Tong Guan, Chaojing Lin, Chongli Yang, Youguo Shi, Cong Ren, Yongqing Li, Hongming Weng, Xi Dai, Zhong Fang, Shishen Yan, and Peng Xiong

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): Tong Guan, Chaojing Lin, Chongli Yang, Youguo Shi, Cong Ren, Yongqing Li, Hongming Weng, Xi Dai, Zhong Fang, Shishen Yan, and Peng Xiong High quality HgCr 2 Se 4 single crystals have been investigated by magnetization, electron transport, and Andreev reflection spectroscopy. In the ferromagnetic ground state, the saturation magnetic moment of each unit cell corresponds to an integer number of electron spins ( 3 μ B / Cr 3 + ), and the Hall ef… [Phys. Rev. Lett. 115, 087002] Published Fri Aug 21, 2015

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Decoherence of Near-Surface Nitrogen-Vacancy Centers Due to Electric Field Noise (2015)

M. Kim, H. J. Mamin, M. H. Sherwood, K. Ohno, D. D. Awschalom, and D. Rugar

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): M. Kim, H. J. Mamin, M. H. Sherwood, K. Ohno, D. D. Awschalom, and D. Rugar We show that electric field noise from surface charge fluctuations can be a significant source of spin decoherence for near-surface nitrogen-vacancy (NV) centers in diamond. This conclusion is based on the increase in spin coherence observed when the diamond surface is covered with high-dielectric-c… [Phys. Rev. Lett. 115, 087602] Published Fri Aug 21, 2015

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Search for intrinsic charm in vector boson production accompanied by heavy-flavor jets (2015)

P.-H. Beauchemin, V. A. Bednyakov, G. I. Lykasov, and Yu. Yu. Stepanenko

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): P.-H. Beauchemin, V. A. Bednyakov, G. I. Lykasov, and Yu. Yu. Stepanenko Assuming the possible existence of an intrinsic (or valencelike) heavy quark component in the proton distribution functions, we analyze the vector boson Z / W production, accompanied by heavy-flavor jets, in p p collisions at the LHC energies. We present theoretical predictions for differential cross s… [Phys. Rev. D 92, 034014] Published Fri Aug 14, 2015

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Efficient Cluster Algorithm for Spin Glasses in Any Space Dimension (2015)

Zheng Zhu, Andrew J. Ochoa, and Helmut G. Katzgraber

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Zheng Zhu, Andrew J. Ochoa, and Helmut G. Katzgraber Spin systems with frustration and disorder are notoriously difficult to study, both analytically and numerically. While the simulation of ferromagnetic statistical mechanical models benefits greatly from cluster algorithms, these accelerated dynamics methods remain elusive for generic spin-glass-lik… [Phys. Rev. Lett. 115, 077201] Published Fri Aug 14, 2015

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Numerical Evidence of Quantum Melting of Spin Ice: Quantum-to-Classical Crossover (2015)

Yasuyuki Kato and Shigeki Onoda

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Yasuyuki Kato and Shigeki Onoda Unbiased quantum Monte Carlo simulations are performed on the nearest-neighbor spin- 1 2 pyrochlore X X Z model with an antiferromagnetic longitudinal and the weak ferromagnetic transverse exchange couplings, J and J ⊥ . The specific heat exhibits a broad peak at T CSI ∼ 0.2 J associated with a crossover to a… [Phys. Rev. Lett. 115, 077202] Published Fri Aug 14, 2015

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Collective Modes and Structural Modulation in Ni-Mn-Ga(Co) Martensite Thin Films Probed by Femtosecond Spectroscopy and Scanning Tunneling Microscopy (2015)

M. Schubert, H. Schaefer, J. Mayer, A. Laptev, M. Hettich, M. Merklein, C. He, C. Rummel, O. Ristow, M. Großmann, Y. Luo, V. Gusev, K. Samwer, M. Fonin, T. Dekorsy, and J. Demsar

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): M. Schubert, H. Schaefer, J. Mayer, A. Laptev, M. Hettich, M. Merklein, C. He, C. Rummel, O. Ristow, M. Großmann, Y. Luo, V. Gusev, K. Samwer, M. Fonin, T. Dekorsy, and J. Demsar The origin of the martensitic transition in the magnetic shape memory alloy Ni-Mn-Ga has been widely discussed. While several studies suggest it is electronically driven, the adaptive martensite model reproduced the peculiar nonharmonic lattice modulation. We used femtosecond spectroscopy to probe t… [Phys. Rev. Lett. 115, 076402] Published Thu Aug 13, 2015

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Reconfigurable Quantum-Dot Molecules Created by Atom Manipulation (2015)

Yi Pan, Jianshu Yang, Steven C. Erwin, Kiyoshi Kanisawa, and Stefan Fölsch

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Yi Pan, Jianshu Yang, Steven C. Erwin, Kiyoshi Kanisawa, and Stefan Fölsch Quantum-dot molecules were constructed on a semiconductor surface using atom manipulation by scanning tunneling microscopy (STM) at 5 K. The molecules consist of several coupled quantum dots, each of which comprises a chain of charged adatoms that electrostatically confines intrinsic surface-state e… [Phys. Rev. Lett. 115, 076803] Published Fri Aug 14, 2015

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Interaction of Strain and Nuclear Spins in Silicon: Quadrupolar Effects on Ionized Donors (2015)

David P. Franke, Florian M. Hrubesch, Markus Künzl, Hans-Werner Becker, Kohei M. Itoh, Martin Stutzmann, Felix Hoehne, Lukas Dreher, and Martin S. Brandt

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-07-30

Beschreibung: Author(s): David P. Franke, Florian M. Hrubesch, Markus Künzl, Hans-Werner Becker, Kohei M. Itoh, Martin Stutzmann, Felix Hoehne, Lukas Dreher, and Martin S. Brandt The interaction between the nuclear quadrupole moment of Arsenic and an electric field gradient can be manipulated by applying an elastic strain to the host silicon crystal. This technique could allow for mechanical tuning of qubits. [Phys. Rev. Lett. 115, 057601] Published Wed Jul 29, 2015

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Large Superconducting Spin Valve Effect and Ultrasmall Exchange Splitting in Epitaxial Rare-Earth-Niobium Trilayers (2015)

Yuanzhou Gu, Gábor B. Halász, J. W. A. Robinson, and M. G. Blamire

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Yuanzhou Gu, Gábor B. Halász, J. W. A. Robinson, and M. G. Blamire Epitaxial Ho / Nb / Ho and Dy / Nb / Dy superconducting spin valves show a reversible change in the zero-field critical temperature ( Δ T c 0 ) of ∼ 400 mK and an infinite magnetoresistance on changing the relative magnetization of the Ho or Dy layers. Unlike transition-metal superconducting spin valves, which s… [Phys. Rev. Lett. 115, 067201] Published Mon Aug 03, 2015

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Surface and Step Conductivities on Si(111) Surfaces (2015)

Sven Just, Marcus Blab, Stefan Korte, Vasily Cherepanov, Helmut Soltner, and Bert Voigtländer

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Sven Just, Marcus Blab, Stefan Korte, Vasily Cherepanov, Helmut Soltner, and Bert Voigtländer Four-point measurements using a multitip scanning tunneling microscope are carried out in order to determine surface and step conductivities on Si(111) surfaces. In a first step, distance-dependent four-point measurements in the linear configuration are used in combination with an analytical three-l… [Phys. Rev. Lett. 115, 066801] Published Mon Aug 03, 2015

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Renormalization of quasiparton distribution (2015)

Xiangdong Ji and Jian-Hui Zhang

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Xiangdong Ji and Jian-Hui Zhang Recent developments showed that light-cone parton distributions can be studied by investigating the large momentum limit of the hadronic matrix elements of spacelike correlators, which are known as quasiparton distributions. Like a light-cone parton distribution, a quasiparton distribution also cont… [Phys. Rev. D 92, 034006] Published Fri Aug 07, 2015

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Linear Scaling of the Exciton Binding Energy versus the Band Gap of Two-Dimensional Materials (2015)

Jin-Ho Choi, Ping Cui, Haiping Lan, and Zhenyu Zhang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Jin-Ho Choi, Ping Cui, Haiping Lan, and Zhenyu Zhang The exciton is one of the most crucial physical entities in the performance of optoelectronic and photonic devices, and widely varying exciton binding energies have been reported in different classes of materials. Using first-principles calculations within the G W –Bethe-Salpeter equation approach, he… [Phys. Rev. Lett. 115, 066403] Published Fri Aug 07, 2015

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Strain Induced Vortex Core Switching in Planar Magnetostrictive Nanostructures (2015)

T. A. Ostler, R. Cuadrado, R. W. Chantrell, A. W. Rushforth, and S. A. Cavill

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): T. A. Ostler, R. Cuadrado, R. W. Chantrell, A. W. Rushforth, and S. A. Cavill The dynamics of magnetic vortex cores is of great interest because the gyrotropic mode has applications in spin torque driven magnetic microwave oscillators, and also provides a means to flip the direction of the core for use in magnetic storage devices. Here, we propose a new means of stimulating m… [Phys. Rev. Lett. 115, 067202] Published Fri Aug 07, 2015

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Line Degeneracy and Strong Spin-Orbit Coupling of Light with Bulk Bianisotropic Metamaterials (2015)

Qinghua Guo, Wenlong Gao, Jing Chen, Yongmin Liu, and Shuang Zhang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Qinghua Guo, Wenlong Gao, Jing Chen, Yongmin Liu, and Shuang Zhang Propagation of light in a medium is dictated by equifrequency surfaces (EFSs), which play a similar role as Fermi surfaces for electrons in crystals. Engineering the equifrequency surface of light through structuring a photonic medium enables superior control over light propagation that goes beyond … [Phys. Rev. Lett. 115, 067402] Published Fri Aug 07, 2015

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Galilean-invariant effective field theory for the X(3872) (2015)

Eric Braaten

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): Eric Braaten XEFT is a low-energy effective field theory for charm mesons and pions that provides a systematically improvable description of the X ( 3872 ) resonance. A Galilean-invariant formulation of XEFT is introduced to exploit the fact that mass is very nearly conserved in the transition D * 0 → D 0 π 0 . The transit... [Phys. Rev. D 91, 114007] Published Thu Jun 04, 2015

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Pole mass of the W boson at two-loop order in the pure MS[over ¯] scheme (2015)

Stephen P. Martin

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): Stephen P. Martin I provide a calculation at full two-loop order of the complex pole squared mass of the W boson in the Standard Model in the pure MS ¯ renormalization scheme, with Goldstone boson mass effects resummed. This approach is an alternative to earlier ones that use on-shell or hybrid renormalization schemes... [Phys. Rev. D 91, 114003] Published Wed Jun 03, 2015

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Tunable Spin-Qubit Coupling Mediated by a Multielectron Quantum Dot (2015)

V. Srinivasa, H. Xu, and J. M. Taylor

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): V. Srinivasa, H. Xu, and J. M. Taylor We present an approach for entangling electron spin qubits localized on spatially separated impurity atoms or quantum dots via a multielectron, two-level quantum dot. The effective exchange interaction mediated by the dot can be understood as the simplest manifestation of Ruderman-Kittel-Kasuya-Yosi... [Phys. Rev. Lett. 114, 226803] Published Thu Jun 04, 2015

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Glueballs from the Bethe-Salpeter equation (2015)

Helios Sanchis-Alepuz, Christian S. Fischer, Christian Kellermann, and Lorenz von Smekal

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Helios Sanchis-Alepuz, Christian S. Fischer, Christian Kellermann, and Lorenz von Smekal We formulate a framework to determine the mass of glueball states of the Landau gauge Yang-Mills theory in the continuum. To this end we derive a Bethe-Salpeter equation for two gluon bound states including the effects of Faddeev-Popov ghosts. We construct a suitable approximation scheme such that t… [Phys. Rev. D 92, 034001] Published Mon Aug 03, 2015

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Phonons, pions, and quasi-long-range order in spatially modulated chiral condensates (2015)

Yoshimasa Hidaka, Kazuhiko Kamikado, Takuya Kanazawa, and Toshifumi Noumi

American Physical Society (APS)

In: Physical Review D

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Beschreibung: Author(s): Yoshimasa Hidaka, Kazuhiko Kamikado, Takuya Kanazawa, and Toshifumi Noumi We investigate low-energy fluctuations in the real kink crystal phase of dense quark matter within the Nambu–Jona-Lasinio model. The modulated chiral condensate breaks both the translational symmetry and chiral symmetry spontaneously, which leads to the appearance of phonons and pions that are domin… [Phys. Rev. D 92, 034003] Published Mon Aug 03, 2015

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Z_{c} (3900) as a resonance from the DD [over ¯] ^{*} interaction (2015)

Jun He

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Jun He In this paper it is proposed that the charged charmonium-like state Z c ( 3900 ) is a resonance above the threshold from the D D ¯ * interaction. The D D ¯ * interaction is described by the one-boson exchange model with light meson exchanges plus a short-range J / ψ exchange. The scattering amplitude is calcula… [Phys. Rev. D 92, 034004] Published Wed Aug 05, 2015

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Beauty-quark and charm-quark pair production asymmetries at LHCb (2015)

Rhorry Gauld, Ulrich Haisch, Ben D. Pecjak, and Emanuele Re

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Rhorry Gauld, Ulrich Haisch, Ben D. Pecjak, and Emanuele Re The LHCb Collaboration has recently performed a first measurement of the angular production asymmetry in the distribution of beauty quarks and antiquarks at a hadron collider. We calculate the corresponding standard model prediction for this asymmetry at fixed order in perturbation theory. Our resul… [Phys. Rev. D 92, 034007] Published Fri Aug 07, 2015

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Heavy flavor dibaryons (2015)

T. F. Caramés and A. Valcarce

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): T. F. Caramés and A. Valcarce We study the two-baryon system with two units of charm looking for the possible existence of a loosely bound state resembling the H dibaryon. We make use of a chiral constituent quark model tuned in the description of the baryon and meson spectra as well as the N N interaction. The presence of the he… [Phys. Rev. D 92, 034015] Published Fri Aug 14, 2015

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Helical Spin Order from Topological Dirac and Weyl Semimetals (2015)

Xiao-Qi Sun, Shou-Cheng Zhang, and Zhong Wang

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): Xiao-Qi Sun, Shou-Cheng Zhang, and Zhong Wang We study dynamical mass generation and the resultant helical spin orders in topological Dirac and Weyl semimetals, including the edge states of quantum spin Hall insulators, the surface states of weak topological insulators, and the bulk materials of Weyl semimetals. In particular, the helical spin … [Phys. Rev. Lett. 115, 076802] Published Thu Aug 13, 2015

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Origin of the Anomalous Mass Renormalization in Metallic Quantum Well States of Strongly Correlated Oxide SrVO_{3} (2015)

Masaki Kobayashi, Kohei Yoshimatsu, Enju Sakai, Miho Kitamura, Koji Horiba, Atsushi Fujimori, and Hiroshi Kumigashira

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Masaki Kobayashi, Kohei Yoshimatsu, Enju Sakai, Miho Kitamura, Koji Horiba, Atsushi Fujimori, and Hiroshi Kumigashira In situ angle-resolved photoemission spectroscopy (ARPES) has been performed on SrVO 3 ultrathin films, which show metallic quantum well (QW) states, to unveil the origin of the anomalous mass enhancement in the QW subbands. The line-shape analysis of the ARPES spectra reveals that the strength of th… [Phys. Rev. Lett. 115, 076801] Published Thu Aug 13, 2015

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Compositeness of the strange, charm, and beauty odd parity Λ states (2015)

C. Garcia-Recio, C. Hidalgo-Duque, J. Nieves, L. L. Salcedo, and L. Tolos

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): C. Garcia-Recio, C. Hidalgo-Duque, J. Nieves, L. L. Salcedo, and L. Tolos We study the dependence on the quark mass of the compositeness of the lowest-lying odd parity hyperon states. Thus, we pay attention to Λ -like states in the strange, charm, and beauty sectors which are dynamically generated using a unitarized meson-baryon model. In the strange sector we use a SU(6) … [Phys. Rev. D 92, 034011] Published Tue Aug 11, 2015

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Constraint on KK [over ¯] compositeness of the a_{0} (980) and f_{0} (980) resonances from their mixing intensity (2015)

T. Sekihara and S. Kumano

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): T. Sekihara and S. Kumano The structure of the a 0 ( 980 ) and f 0 ( 980 ) resonances is investigated with the a 0 ( 980 ) − f 0 ( 980 ) mixing intensity from the viewpoint of compositeness, which corresponds to the amount of two-body states composing resonances as well as bound states. For this purpose, we first formulate the a 0 ( 980 ) − f 0 ( 980 ) … [Phys. Rev. D 92, 034010] Published Tue Aug 11, 2015

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Anderson Localization and the Quantum Phase Diagram of Three Dimensional Disordered Dirac Semimetals (2015)

J. H. Pixley, Pallab Goswami, and S. Das Sarma

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): J. H. Pixley, Pallab Goswami, and S. Das Sarma We study the quantum phase diagram of a three dimensional noninteracting Dirac semimetal in the presence of either quenched axial or scalar potential disorder, by calculating the average and the typical density of states as well as the inverse participation ratio using numerically exact methods. We … [Phys. Rev. Lett. 115, 076601] Published Tue Aug 11, 2015

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Analyzing b→u transitions in semileptonic B [over ¯] _{s} →K^{*+} (→Kπ)ℓ^{−} ν [over ¯] _{ℓ} decays (2015)

Thorsten Feldmann, Bastian Müller, and Danny van Dyk

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Thorsten Feldmann, Bastian Müller, and Danny van Dyk We study the semileptonic decay B ¯ s → K * + ℓ − ν ¯ ℓ , which is induced by b → u ℓ − ν ¯ ℓ transitions at the quark level. We take into account the standard model (SM) operator from W -boson exchange as well as possible extensions from physics beyond the SM. The secondary decay K * + → K π can be used to study a number o… [Phys. Rev. D 92, 034013] Published Fri Aug 14, 2015

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Factorization of the dijet cross section in electron-positron annihilation with jet algorithms (2015)

Junegone Chay, Chul Kim, and Inchol Kim

American Physical Society (APS)

In: Physical Review D

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Beschreibung: Author(s): Junegone Chay, Chul Kim, and Inchol Kim We analyze the effects of jet algorithms on each factorized part of the dijet cross sections in e + e − annihilation using the soft-collinear effective theory. The jet function and the soft function with a cone-type jet algorithm and the Sterman-Weinberg jet algorithm are computed to next-to-leading or… [Phys. Rev. D 92, 034012] Published Thu Aug 13, 2015

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Spin Hall Effects Due to Phonon Skew Scattering (2015)

Cosimo Gorini, Ulrich Eckern, and Roberto Raimondi

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): Cosimo Gorini, Ulrich Eckern, and Roberto Raimondi A diversity of spin Hall effects in metallic systems is known to rely on Mott skew scattering. In this work its high-temperature counterpart, phonon skew scattering, which is expected to be of foremost experimental relevance, is investigated. In particular, the phonon skew scattering spin Hall condu… [Phys. Rev. Lett. 115, 076602] Published Fri Aug 14, 2015

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Candidate Source of Flux Noise in SQUIDs: Adsorbed Oxygen Molecules (2015)

Hui Wang, Chuntai Shi, Jun Hu, Sungho Han, Clare C. Yu, and R. Q. Wu

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): Hui Wang, Chuntai Shi, Jun Hu, Sungho Han, Clare C. Yu, and R. Q. Wu A major obstacle to using superconducting quantum interference devices (SQUIDs) as qubits is flux noise. We propose that the heretofore mysterious spins producing flux noise could be O 2 molecules adsorbed on the surface. Using density functional theory calculations, we find that an O 2 molecule adsor… [Phys. Rev. Lett. 115, 077002] Published Fri Aug 14, 2015

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Controlled Strong Coupling and Absence of Dark Polaritons in Microcavities with Double Quantum Wells (2015)

K. Sivalertporn and E. A. Muljarov

American Physical Society (APS)

In: Physical Review Letters

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Beschreibung: Author(s): K. Sivalertporn and E. A. Muljarov We demonstrate an efficient switching between strong and weak exciton-photon coupling regimes in microcavity-embedded asymmetric double quantum wells, controlled by an applied electric field. We show that a fine-tuning of the electric field leads to drastic changes in the polariton properties, with … [Phys. Rev. Lett. 115, 077401] Published Fri Aug 14, 2015

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Studies of two-solar-mass hybrid stars within the framework of Dyson-Schwinger equations (2015)

Tong Zhao, Shu-Sheng Xu, Yan Yan, Xin-Lian Luo, Xiao-Jun Liu, and Hong-Shi Zong

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-10

Beschreibung: Author(s): Tong Zhao, Shu-Sheng Xu, Yan Yan, Xin-Lian Luo, Xiao-Jun Liu, and Hong-Shi Zong In this paper we introduce an equation of state (EOS) of quark matter within the framework of Dyson-Schwinger equations to study the structure of compact stars. The smooth crossover from hadronic matter to quark matter in the hybrid star is studied. We compare different strategies to obtain crossove… [Phys. Rev. D 92, 054012] Published Wed Sep 09, 2015

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Simulating net particle production and chiral magnetic current in a CP-odd domain (2015)

Kenji Fukushima

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-10

Beschreibung: Author(s): Kenji Fukushima To address a question of whether the chiral magnetic current is a static polarization or a genuine flow of charged particles, we elucidate the numerical formulation to simulate the net production of right-handed particles and anomalous currents with C P -breaking background fields which cause an imbal… [Phys. Rev. D 92, 054009] Published Tue Sep 08, 2015

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Gigantic Surface Lifetime of an Intrinsic Topological Insulator (2015)

Madhab Neupane, Su-Yang Xu, Yukiaki Ishida, Shuang Jia, Benjamin M. Fregoso, Chang Liu, Ilya Belopolski, Guang Bian, Nasser Alidoust, Tomasz Durakiewicz, Victor Galitski, Shik Shin, Robert J. Cava, and M. Zahid Hasan

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-10

Beschreibung: Author(s): Madhab Neupane, Su-Yang Xu, Yukiaki Ishida, Shuang Jia, Benjamin M. Fregoso, Chang Liu, Ilya Belopolski, Guang Bian, Nasser Alidoust, Tomasz Durakiewicz, Victor Galitski, Shik Shin, Robert J. Cava, and M. Zahid Hasan Exceptionally long-lived excited surface states are found in the topological insulator Bi 2 Te 2 Se, with the state persisting for microseconds. [Phys. Rev. Lett. 115, 116801] Published Wed Sep 09, 2015

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Antiferroquadrupolar and Ising-Nematic Orders of a Frustrated Bilinear-Biquadratic Heisenberg Model and Implications for the Magnetism of FeSe (2015)

Rong Yu and Qimiao Si

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-10

Beschreibung: Author(s): Rong Yu and Qimiao Si Motivated by the properties of the iron chalcogenides, we study the phase diagram of a generalized Heisenberg model with frustrated bilinear-biquadratic interactions on a square lattice. We identify zero-temperature phases with antiferroquadrupolar and Ising-nematic orders. The effects of quantum fl… [Phys. Rev. Lett. 115, 116401] Published Tue Sep 08, 2015

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Superconducting Fluctuations in the Normal State of the Two-Dimensional Hubbard Model (2015)

Xi Chen, J. P. F. Le; Blanc, and Emanuel Gull

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-10

Beschreibung: Author(s): Xi Chen, J. P. F. LeBlanc, and Emanuel Gull We compute the two-particle quantities relevant for superconducting correlations in the two-dimensional Hubbard model within the dynamical cluster approximation. In the normal state we identify the parameter regime in density, interaction, and second-nearest-neighbor hopping strength that maximizes … [Phys. Rev. Lett. 115, 116402] Published Wed Sep 09, 2015

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Bosonic Integer Quantum Hall Effect in Optical Flux Lattices (2015)

A. Sterdyniak, Nigel R. Cooper, and N. Regnault

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-11

Beschreibung: Author(s): A. Sterdyniak, Nigel R. Cooper, and N. Regnault In two dimensions strongly interacting bosons in a magnetic field can realize a bosonic integer quantum Hall state, the simplest two-dimensional example of a symmetry-protected topological phase. We propose a realistic implementation of this phase using an optical flux lattice. Through exact diagona… [Phys. Rev. Lett. 115, 116802] Published Thu Sep 10, 2015

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Magnetoanisotropic Andreev Reflection in Ferromagnet-Superconductor Junctions (2015)

Petra Högl, Alex Matos-Abiague, Igor Žutić, and Jaroslav Fabian

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-11

Beschreibung: Author(s): Petra Högl, Alex Matos-Abiague, Igor Žutić, and Jaroslav Fabian Andreev reflection spectroscopy of ferromagnet-supercondutor (FS) junctions is an important probe of spin polarization. We theoretically investigate spin-polarized transport in FS junctions in the presence of Rashba and Dresselhaus interfacial spin-orbit fields and show that Andreev reflection can b… [Phys. Rev. Lett. 115, 116601] Published Thu Sep 10, 2015

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Bosonic Integer Quantum Hall Effect in an Interacting Lattice Model (2015)

Yin-Chen He, Subhro Bhattacharjee, R. Moessner, and Frank Pollmann

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-11

Beschreibung: Author(s): Yin-Chen He, Subhro Bhattacharjee, R. Moessner, and Frank Pollmann We study a bosonic model with correlated hopping on a honeycomb lattice, and show that its ground state is a bosonic integer quantum Hall (BIQH) phase, a prominent example of a symmetry-protected topological (SPT) phase. By using the infinite density matrix renormalization group method, we establish… [Phys. Rev. Lett. 115, 116803] Published Thu Sep 10, 2015

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Electromagnetic decays of the charmed and bottom baryons in chiral perturbation theory (2015)

Nan Jiang, Xiao-Lin Chen, and Shi-Lin Zhu

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-12

Beschreibung: Author(s): Nan Jiang, Xiao-Lin Chen, and Shi-Lin Zhu We have investigated the electromagnetic decays of the antitriplet and sextet charmed baryon systems with J P = 1 2 + , 3 2 + in the framework of the heavy baryon chiral perturbation theory. We first construct the chiral Lagrangians at O ( p 2 ) and O ( p 3 ) . Then we calculate the electromagnetic (EM) decay amplitu… [Phys. Rev. D 92, 054017] Published Fri Sep 11, 2015

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Baryon susceptibilities, non-Gaussian moments, and the QCD critical point (2015)

Jiunn-Wei Chen, Jian Deng, and Lance Labun

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-15

Beschreibung: Author(s): Jiunn-Wei Chen, Jian Deng, and Lance Labun We calculate model-independently the impact of the critical point on higher-order baryon susceptibilities χ n , showing how they depend on fluctuations of the order parameter. We characterize the kurtosis of the order parameter fluctuations and the baryon moments χ 3 , χ 4 as functions on the phase diagra… [Phys. Rev. D 92, 054019] Published Mon Sep 14, 2015

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Flavor models for B [over ¯] →D^{(*)} τν [over ¯] (2015)

Marat Freytsis, Zoltan Ligeti, and Joshua T. Ruderman

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-15

Beschreibung: Author(s): Marat Freytsis, Zoltan Ligeti, and Joshua T. Ruderman The ratio of the measured B ¯ → D ( * ) ℓ ν ¯ decay rates for ℓ = τ vs e , μ deviate from the standard model (SM) by about 4 σ . We show that the data are in tension with the SM, independent of form factor calculations, and we update the SM prediction for B ( B → X c τ ν ¯ ) / B ( B → X c ℓ ν ¯ ) . We classify the operators that can a… [Phys. Rev. D 92, 054018] Published Mon Sep 14, 2015

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Semiconductor-Nanowire-Based Superconducting Qubit (2015)

T. W. Larsen, K. D. Petersson, F. Kuemmeth, T. S. Jespersen, P. Krogstrup, J. Nygård, and C. M. Marcus

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-15

Beschreibung: Author(s): T. W. Larsen, K. D. Petersson, F. Kuemmeth, T. S. Jespersen, P. Krogstrup, J. Nygård, and C. M. Marcus A qubit made of a semiconducting nanowire sandwiched between two superconductors could simplify the design of quantum information processing architectures. [Phys. Rev. Lett. 115, 127001] Published Mon Sep 14, 2015

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η−η^{′} mixing (2015)

T. N. Pham

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-16

Beschreibung: Author(s): T. N. Pham The η − η ′ mixing mass term due to the derivative coupling S U ( 3 ) × S U ( 3 ) symmetry breaking term, produces an additional momentum-dependent pole term for processes with η ′ but is suppressed in the η amplitude by a factor m η 2 / m η ′ 2 . This seems to be the origin of the two-angle description of the pseudoscal… [Phys. Rev. D 92, 054021] Published Tue Sep 15, 2015

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Melting of Three-Sublattice Order in Easy-Axis Antiferromagnets on Triangular and Kagome Lattices (2015)

Kedar Damle

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-17

Beschreibung: Author(s): Kedar Damle When the constituent spins have an energetic preference to lie along an easy axis, triangular and kagome lattice antiferromagnets often develop long-range order that distinguishes the three sublattices of the underlying triangular Bravais lattice. In zero magnetic field, this three-sublattice order … [Phys. Rev. Lett. 115, 127204] Published Wed Sep 16, 2015

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Electrical Tuning of Exciton Binding Energies in Monolayer WS_{2} (2015)

Alexey Chernikov, Arend M. van der Zande, Heather M. Hill, Albert F. Rigosi, Ajanth Velauthapillai, James Hone, and Tony F. Heinz

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-17

Beschreibung: Author(s): Alexey Chernikov, Arend M. van der Zande, Heather M. Hill, Albert F. Rigosi, Ajanth Velauthapillai, James Hone, and Tony F. Heinz An externally applied voltage in a transistor device can continuously tune the binding energy of excitons in monolayer WS 2 . [Phys. Rev. Lett. 115, 126802] Published Wed Sep 16, 2015

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Optical Diode Effect at Spin-Wave Excitations of the Room-Temperature Multiferroic BiFeO_{3} (2015)

I. Kézsmárki, U. Nagel, S. Bordács, R. S. Fishman, J. H. Lee, Hee Taek Yi, S.-W. Cheong, and T. Rõõm

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-17

Beschreibung: Author(s): I. Kézsmárki, U. Nagel, S. Bordács, R. S. Fishman, J. H. Lee, Hee Taek Yi, S.-W. Cheong, and T. Rõõm Multiferroics permit the magnetic control of the electric polarization and the electric control of the magnetization. These static magnetoelectric (ME) effects are of enormous interest: The ability to read and write a magnetic state current-free by an electric voltage would provide a huge technologi… [Phys. Rev. Lett. 115, 127203] Published Tue Sep 15, 2015

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Extended Goldberger-Treiman relation in a three-flavor parity doublet model (2015)

Hiroki Nishihara and Masayasu Harada

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-19

Beschreibung: Author(s): Hiroki Nishihara and Masayasu Harada We study masses and decay widths of positive and negative parity nucleons using a three-flavor parity doublet model, in which we introduce three representations, [ ( 3 , 3 ¯ ) ⊕ ( 3 ¯ , 3 ) ] , [ ( 3 , 6 ) ⊕ ( 6 , 3 ) ] , and [ ( 8 , 1 ) ⊕ ( 1 , 8 ) ] of the chiral U ( 3 ) L × U ( 3 ) R symmetry. We find an extended version of the Goldberger-Treima… [Phys. Rev. D 92, 054022] Published Fri Sep 18, 2015

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Alloy Engineering of Defect Properties in Semiconductors: Suppression of Deep Levels in Transition-Metal Dichalcogenides (2015)

Bing Huang, Mina Yoon, Bobby G. Sumpter, Su-Huai Wei, and Feng Liu

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-19

Beschreibung: Author(s): Bing Huang, Mina Yoon, Bobby G. Sumpter, Su-Huai Wei, and Feng Liu Developing practical approaches to effectively reduce the amount of deep defect levels in semiconductors is critical for their use in electronic and optoelectronic devices, but this still remains a very challenging task. In this Letter, we propose that specific alloying can provide an effective mean… [Phys. Rev. Lett. 115, 126806] Published Fri Sep 18, 2015

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Fractional Quantum Hall States at ν=13/5 and 12/5 and Their Non-Abelian Nature (2015)

W. Zhu, S. S. Gong, F. D. M. Haldane, and D. N. Sheng

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-19

Beschreibung: Author(s): W. Zhu, S. S. Gong, F. D. M. Haldane, and D. N. Sheng Topological quantum states with non-Abelian Fibonacci anyonic excitations are widely sought after for the exotic fundamental physics they would exhibit, and for universal quantum computing applications. The fractional quantum Hall (FQH) state at a filling factor of ν = 12 / 5 is a promising candidate; h… [Phys. Rev. Lett. 115, 126805] Published Fri Sep 18, 2015

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Projected Dipole Model for Quantum Plasmonics (2015)

Wei Yan, Martijn Wubs, and N. Asger Mortensen

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-24

Beschreibung: Author(s): Wei Yan, Martijn Wubs, and N. Asger Mortensen Quantum effects of plasmonic phenomena have been explored through ab initio studies, but only for exceedingly small metallic nanostructures, leaving most experimentally relevant structures too large to handle. We propose instead an effective description with the computationally appealing features of… [Phys. Rev. Lett. 115, 137403] Published Wed Sep 23, 2015

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Semiconducting Graphene from Highly Ordered Substrate Interactions (2015)

M. S. Nevius, M. Conrad, F. Wang, A. Celis, M. N. Nair, A. Taleb-Ibrahimi, A. Tejeda, and E. H. Conrad

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-24

Beschreibung: Author(s): M. S. Nevius, M. Conrad, F. Wang, A. Celis, M. N. Nair, A. Taleb-Ibrahimi, A. Tejeda, and E. H. Conrad Researchers have engineered a large energy band gap in a graphene layer grown on a silicon carbide substrate. [Phys. Rev. Lett. 115, 136802] Published Mon Sep 21, 2015

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Dynamical Mean-Field Theory Plus Numerical Renormalization-Group Study of Spin-Orbital Separation in a Three-Band Hund Metal (2015)

K. M. Stadler, Z. P. Yin, J. von Delft, G. Kotliar, and A. Weichselbaum

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-24

Beschreibung: Author(s): K. M. Stadler, Z. P. Yin, J. von Delft, G. Kotliar, and A. Weichselbaum We show that the numerical renormalization group is a viable multi-band impurity solver for dynamical mean-field theory (DMFT), offering unprecedented real-frequency spectral resolution at arbitrarily low energies and temperatures. We use it to obtain a numerically exact DMFT solution to the Hund me… [Phys. Rev. Lett. 115, 136401] Published Tue Sep 22, 2015

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Competing Magnetic Fluctuations in Iron Pnictide Superconductors: Role of Ferromagnetic Spin Correlations Revealed by NMR (2015)

P. Wiecki, B. Roy, D. C. Johnston, S. L. Bud’ko, P. C. Canfield, and Y. Furukawa

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-24

Beschreibung: Author(s): P. Wiecki, B. Roy, D. C. Johnston, S. L. Bud’ko, P. C. Canfield, and Y. Furukawa In the iron pnictide superconductors, theoretical calculations have consistently shown enhancements of the static magnetic susceptibility at both the stripe-type antiferromagnetic and in-plane ferromagnetic (FM) wave vectors. However, the possible existence of FM fluctuations has not yet been examin… [Phys. Rev. Lett. 115, 137001] Published Tue Sep 22, 2015

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Fully Parameter-Free Calculation of Optical Spectra for Insulators, Semiconductors, and Metals from a Simple Polarization Functional (2015)

J. A. Berger

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-24

Beschreibung: Author(s): J. A. Berger We present a fully parameter-free density-functional approach for the accurate description of optical absorption spectra of insulators, semiconductors, and metals. We show that this can be achieved within time-dependent current-density-functional theory using a simple dynamical polarization function… [Phys. Rev. Lett. 115, 137402] Published Tue Sep 22, 2015

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Four-loop standard model effective potential at leading order in QCD (2015)

Stephen P. Martin

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Stephen P. Martin The leading QCD part of the four-loop contribution to the effective potential for the standard model Higgs field is found. As a byproduct, I also find the corresponding contribution to the four-loop beta function of the Higgs self-interaction coupling. [Phys. Rev. D 92, 054029] Published Thu Sep 24, 2015

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Effects of a dressed quark-gluon vertex in pseudoscalar heavy-light mesons (2015)

M. Gómez-Rocha, T. Hilger, and A. Krassnigg

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): M. Gómez-Rocha, T. Hilger, and A. Krassnigg Using a simple model in the context of the Dyson-Schwinger-Bethe-Salpeter approach, we investigate the effects of a dressed-quark-gluon vertex on pseudoscalar meson masses. In particular, we focus on the unequal-mass case and investigate heavy-light meson masses; in addition, we study the premise of… [Phys. Rev. D 92, 054030] Published Thu Sep 24, 2015

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Charmonia in a contact interaction (2015)

Marco A. Bedolla, J. J. Cobos-Martínez, and Adnan Bashir

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Marco A. Bedolla, J. J. Cobos-Martínez, and Adnan Bashir For the flavor-singlet heavy quark system of charmonia, we compute the masses of the ground state mesons in four different channels: pseudoscalar [ η c ( 1 S ) ], vector [ J / Ψ ( 1 S ) ], scalar [ χ c 0 ( 1 P ) ] and axial vector [ χ c 1 ( 1 P ) ], as well as the weak decay constants of the η c ( 1 S ) and J / Ψ ( 1 S ) and the charge radi… [Phys. Rev. D 92, 054031] Published Thu Sep 24, 2015

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Origin of the structures observed in e^{+} e^{−} annihilation into multipion states around the p [over ¯] p threshold (2015)

Johann Haidenbauer, Christoph Hanhart, Xian-Wei Kang, and Ulf-G. Meißner

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Johann Haidenbauer, Christoph Hanhart, Xian-Wei Kang, and Ulf-G. Meißner We analyze the origin of the structures observed in the reactions e + e − → 3 ( π + π − ) , 2 ( π + π − π 0 ) , ω π + π − π 0 , and e + e − → 2 ( π + π − ) π 0 around the antiproton-proton ( p ¯ p ) threshold. We estimate the contribution of the two-step process e + e − → N ¯ N → multipions to the total reaction amplitude. The amplitude for e + e − → N ¯ N i… [Phys. Rev. D 92, 054032] Published Thu Sep 24, 2015

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Electric Field Control of Spin Lifetimes in Nb−SrTiO_{3} by Spin-Orbit Fields (2015)

A. M. Kamerbeek, P. Högl, J. Fabian, and T. Banerjee

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): A. M. Kamerbeek, P. Högl, J. Fabian, and T. Banerjee We show electric field control of the spin accumulation at the interface of the oxide semiconductor Nb − SrTiO 3 with Co / AlO x spin injection contacts at room temperature. The in-plane spin lifetime τ ∥ , as well as the ratio of the out-of-plane to in-plane spin lifetime τ ⊥ / τ ∥ , is manipulated by the built… [Phys. Rev. Lett. 115, 136601] Published Thu Sep 24, 2015

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Local Spectroscopic Characterization of Spin and Layer Polarization in WSe_{2} (2015)

Matthew Yankowitz, Devin McKenzie, and Brian J. Le; Roy

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Matthew Yankowitz, Devin McKenzie, and Brian J. LeRoy Tunneling spectroscopy exhibits suppression of intervalley electronic scattering in the valence band of a monolayer of the transition metal dichalcogenide WSe 2 . [Phys. Rev. Lett. 115, 136803] Published Thu Sep 24, 2015

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Successive Magnetic-Field-Induced Transitions and Colossal Magnetoelectric Effect in Ni_{3} TeO_{6} (2015)

Jae Wook Kim, S. Artyukhin, E. D. Mun, M. Jaime, N. Harrison, A. Hansen, J. J. Yang, Y. S. Oh, D. Vanderbilt, V. S. Zapf, and S.-W. Cheong

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Jae Wook Kim, S. Artyukhin, E. D. Mun, M. Jaime, N. Harrison, A. Hansen, J. J. Yang, Y. S. Oh, D. Vanderbilt, V. S. Zapf, and S.-W. Cheong We report the discovery of a metamagnetic phase transition in a polar antiferromagnet Ni 3 TeO 6 that occurs at 52 T. The new phase transition accompanies a colossal magnetoelectric effect, with a magnetic-field-induced polarization change of 0.3 μ C / cm 2 , a value that is 4 times larger than for the spi… [Phys. Rev. Lett. 115, 137201] Published Thu Sep 24, 2015

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Band Engineering of Dirac Surface States in Topological-Insulator-Based van der Waals Heterostructures (2015)

Cui-Zu Chang, Peizhe Tang, Xiao Feng, Kang Li, Xu-Cun Ma, Wenhui Duan, Ke He, and Qi-Kun Xue

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Cui-Zu Chang, Peizhe Tang, Xiao Feng, Kang Li, Xu-Cun Ma, Wenhui Duan, Ke He, and Qi-Kun Xue The existence of a gapless Dirac surface band of a three dimensional (3D) topological insulator (TI) is guaranteed by the nontrivial topological character of the bulk band, yet the surface band dispersion is mainly determined by the environment near the surface. In this Letter , through in situ angle… [Phys. Rev. Lett. 115, 136801] Published Wed Sep 23, 2015

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Ferromagnetic Spin Fluctuation and Unconventional Superconductivity in Rb_{2} Cr_{3} As_{3} Revealed by ^{75} As NMR and NQR (2015)

J. Yang, Z. T. Tang, G. H. Cao, and Guo-qing Zheng

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-30

Beschreibung: Author(s): J. Yang, Z. T. Tang, G. H. Cao, and Guo-qing Zheng We report As 75 nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) studies on the superconductor Rb 2 Cr 3 As 3 with a quasi-one-dimensional crystal structure. Below T ∼ 100 K , the spin-lattice relaxation rate ( 1 / T 1 ) divided by temperature, 1 / T 1 T , increases upon cooling down to T c = 4.8 … [Phys. Rev. Lett. 115, 147002] Published Tue Sep 29, 2015

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Long-distance weak annihilation contribution to the B^{±} →(π^{±} ,K^{±} )ℓ^{+} ℓ^{−} decays (2015)

A. Guevara, G. López Castro, P. Roig, and S. L. Tostado

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): A. Guevara, G. López Castro, P. Roig, and S. L. Tostado We propose an alternative evaluation of the long-distance weak annihilation (WA, also called one-photon exchange in this paper) contribution to the rare semileptonic B ± → ( π ± , K ± ) ℓ + ℓ − ( ℓ = e , μ ) decays. This hadronic description at low energies is matched at intermediate energies to its short-distance cou… [Phys. Rev. D 92, 054035] Published Mon Sep 28, 2015

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Bottomonium mesons and strategies for their observation (2015)

Stephen Godfrey and Kenneth Moats

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Stephen Godfrey and Kenneth Moats The B -factories and Large Hadron Collider experiments have demonstrated the ability to observe and measure the properties of bottomonium mesons. In order to discover missing states it is useful to know their properties to develop a successful search strategy. To this end we calculate the masses and … [Phys. Rev. D 92, 054034] Published Mon Sep 28, 2015

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Tracking new physics at the LHC and beyond (2015)

Michael Spannowsky and Martin Stoll

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Michael Spannowsky and Martin Stoll Heavy resonances are an integral part of many extensions of the standard model. The discovery of such heavy resonances are a primary goal at the LHC and future hadron colliders. When a particle with TeV-scale mass decays into electroweak-scale objects, these objects are highly boosted and their deca… [Phys. Rev. D 92, 054033] Published Fri Sep 25, 2015

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Quantum Oscillations without a Fermi Surface and the Anomalous de Haas–van Alphen Effect (2015)

Johannes Knolle and Nigel R. Cooper

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Johannes Knolle and Nigel R. Cooper The Fermi surface of a metal is typically detected via quantum oscillations of its thermodynamic properties in response to a changing applied magnetic field. A microscopic model shows that these oscillations also occur in a band insulator, despite the absence of a Fermi surface. [Phys. Rev. Lett. 115, 146401] Published Mon Sep 28, 2015

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Size-Induced Depression of First-Order Transition Lines and Entropy Jump in Extremely Layered Nanocrystalline Vortex Matter (2015)

M. I. Dolz, Y. Fasano, N. R. Cejas Bolecek, H. Pastoriza, V. Mosser, M. Li, and M. Konczykowski

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): M. I. Dolz, Y. Fasano, N. R. Cejas Bolecek, H. Pastoriza, V. Mosser, M. Li, and M. Konczykowski We detect the persistence of the solidification and order-disorder first-order transition lines in the phase diagram of nanocrystalline Bi 2 Sr 2 CaCu 2 O 8 vortex matter down to a system size of less than one hundred vortices. The temperature location of the vortex solidification transition line is not al… [Phys. Rev. Lett. 115, 137003] Published Fri Sep 25, 2015

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Observation of a Helical Luttinger Liquid in InAs/GaSb Quantum Spin Hall Edges (2015)

Tingxin Li, Pengjie Wang, Hailong Fu, Lingjie Du, Kate A. Schreiber, Xiaoyang Mu, Xiaoxue Liu, Gerard Sullivan, Gábor A. Csáthy, Xi Lin, and Rui-Rui Du

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Tingxin Li, Pengjie Wang, Hailong Fu, Lingjie Du, Kate A. Schreiber, Xiaoyang Mu, Xiaoxue Liu, Gerard Sullivan, Gábor A. Csáthy, Xi Lin, and Rui-Rui Du Strong electron-electron interactions are observed in one dimensional InAs/GaSb quantum spin Hall insulators. [Phys. Rev. Lett. 115, 136804] Published Fri Sep 25, 2015

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Many-Body Theory of Ultrafast Demagnetization and Angular Momentum Transfer in Ferromagnetic Transition Metals (2015)

W. Töws and G. M. Pastor

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-21

Beschreibung: Author(s): W. Töws and G. M. Pastor Exact calculated time evolutions in the framework of a many-electron model of itinerant magnetism provide new insights into the laser-induced ultrafast demagnetization observed in ferromagnetic (FM) transition metal thin films. The interplay between local spin-orbit interactions and interatomic hopp… [Phys. Rev. Lett. 115, 217204] Published Fri Nov 20, 2015

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Quantum Nonlinear Hall Effect Induced by Berry Curvature Dipole in Time-Reversal Invariant Materials (2015)

Inti Sodemann and Liang Fu

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-21

Beschreibung: Author(s): Inti Sodemann and Liang Fu It is well known that a nonvanishing Hall conductivity requires broken time-reversal symmetry. However, in this work, we demonstrate that Hall-like currents can occur in second-order response to external electric fields in a wide class of time-reversal invariant and inversion breaking materials, at … [Phys. Rev. Lett. 115, 216806] Published Fri Nov 20, 2015

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Diphoton production at the Tevatron and the LHC in the NLO approximation of the parton Reggeization approach (2015)

M. A. Nefedov and V. A. Saleev

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): M. A. Nefedov and V. A. Saleev The hadroproduction of prompt isolated photon pairs at high energies is studied in the framework of the parton Reggeization approach. The real part of the NLO corrections is computed (the NLO ⋆ approximation), and the procedure for the subtraction of double counting between real parton emissions in t… [Phys. Rev. D 92, 094033] Published Wed Nov 25, 2015

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Λ_{c}^{*} (2940)^{+} photoproduction off the neutron (2015)

Xiao-Yun Wang, Alexey Guskov, and Xu-Rong Chen

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Xiao-Yun Wang, Alexey Guskov, and Xu-Rong Chen By assuming that the Λ c * ( 2940 ) is a p D * 0 molecular state with spin-parity J P = 1 2 + and J P = 1 2 − , the photoproduction of charmed Λ c * ( 2940 ) baryon in the γ n → D − Λ c * ( 2940 ) + process is investigated with an effective Lagrangian approach. It is found that the contributions from the t -channel with D * exchange ar… [Phys. Rev. D 92, 094032] Published Wed Nov 25, 2015

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Magnetic Field Tuning and Quantum Interference in a Cooper Pair Splitter (2015)

G. Fülöp, F. Domínguez, S. d’Hollosy, A. Baumgartner, P. Makk, M. H. Madsen, V. A. Guzenko, J. Nygård, C. Schönenberger, A. Levy Yeyati, and S. Csonka

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): G. Fülöp, F. Domínguez, S. d’Hollosy, A. Baumgartner, P. Makk, M. H. Madsen, V. A. Guzenko, J. Nygård, C. Schönenberger, A. Levy Yeyati, and S. Csonka Cooper pair splitting (CPS) is a process in which the electrons of the naturally occurring spin-singlet pairs in a superconductor are spatially separated using two quantum dots. Here, we investigate the evolution of the conductance correlations in an InAs CPS device in the presence of an external ma… [Phys. Rev. Lett. 115, 227003] Published Wed Nov 25, 2015

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Spin-Current to Charge-Current Conversion and Magnetoresistance in a Hybrid Structure of Graphene and Yttrium Iron Garnet (2015)

J. B. S. Mendes, O. Alves Santos, L. M. Meireles, R. G. Lacerda, L. H. Vilela-Leão, F. L. A. Machado, R. L. Rodríguez-Suárez, A. Azevedo, and S. M. Rezende

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): J. B. S. Mendes, O. Alves Santos, L. M. Meireles, R. G. Lacerda, L. H. Vilela-Leão, F. L. A. Machado, R. L. Rodríguez-Suárez, A. Azevedo, and S. M. Rezende The use of graphene in spintronic devices depends, among other things, on its ability to convert a spin excitation into an electric charge signal, a phenomenon that requires a spin-orbit coupling (SOC). Here we report the observation of two effects that show the existence of SOC in large-area CVD gr… [Phys. Rev. Lett. 115, 226601] Published Wed Nov 25, 2015

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Leggett Modes and the Anderson-Higgs Mechanism in Superconductors without Inversion Symmetry (2015)

Nikolaj Bittner, Dietrich Einzel, Ludwig Klam, and Dirk Manske

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Nikolaj Bittner, Dietrich Einzel, Ludwig Klam, and Dirk Manske We develop a microscopic and gauge-invariant theory for collective modes resulting from the phase of the superconducting order parameter in noncentrosymmetric superconductors. Considering various crystal symmetries, we derive the corresponding gauge mode ω G ( q ) and find, in particular, new Leggett mo… [Phys. Rev. Lett. 115, 227002] Published Tue Nov 24, 2015

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Suppression of Three-Dimensional Charge Density Wave Ordering via Thickness Control (2015)

Gideok Kim, Michael Neumann, Minu Kim, Manh Duc Le, Tae Dong Kang, and Tae Won Noh

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Gideok Kim, Michael Neumann, Minu Kim, Manh Duc Le, Tae Dong Kang, and Tae Won Noh Barium bismuth oxide ( BaBiO 3 ) is the end member of two families of high- T c superconductors, i.e., BaPb 1 − x Bi x O 3 and Ba 1 − x K x BiO 3 . The undoped parent compound is an insulator, exhibiting a charge density wave that is strongly linked to a static breathing distortion in the oxygen sublattice of the perov… [Phys. Rev. Lett. 115, 226402] Published Tue Nov 24, 2015

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

Print ISSN: 0031-9007

Digitale ISSN: 1079-7114

Thema: Physik

Publiziert von American Physical Society (APS)

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Nucleon resonances with spin 3/2 and 5/2 in the isobar model for kaon photoproduction (2015)

T. Mart, S. Clymton, and A. J. Arifi

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-19

Beschreibung: Author(s): T. Mart, S. Clymton, and A. J. Arifi We compare two different propagator and vertex factor formulations of spin- 3 / 2 and − 5 / 2 nucleon resonances by using isobar models for kaon photoproduction on the proton γ + p → K + + Λ . All nucleon resonances listed in the Particle Data Group listing with spin up to 5 / 2 and with at least a two-star rating … [Phys. Rev. D 92, 094019] Published Wed Nov 18, 2015

Schlagwort(e): Strong Interactions

Print ISSN: 0556-2821

Digitale ISSN: 1089-4918

Thema: Physik

Publiziert von American Physical Society (APS)

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Interplay of Surface and Dirac Plasmons in Topological Insulators: The Case of Bi_{2} Se_{3} (2015)

A. Politano, V. M. Silkin, I. A. Nechaev, M. S. Vitiello, L. Viti, Z. S. Aliev, M. B. Babanly, G. Chiarello, P. M. Echenique, and E. V. Chulkov

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-19

Beschreibung: Author(s): A. Politano, V. M. Silkin, I. A. Nechaev, M. S. Vitiello, L. Viti, Z. S. Aliev, M. B. Babanly, G. Chiarello, P. M. Echenique, and E. V. Chulkov We have investigated plasmonic excitations at the surface of Bi 2 Se 3 ( 0001 ) via high-resolution electron energy loss spectroscopy. For low parallel momentum transfer q ∥ , the loss spectrum shows a distinctive feature peaked at 104 meV. This mode varies weakly with q ∥ . The behavior of its intensity as a… [Phys. Rev. Lett. 115, 216802] Published Wed Nov 18, 2015

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

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Digitale ISSN: 1079-7114

Thema: Physik

Publiziert von American Physical Society (APS)

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Self-Assembled Wigner Crystals as Mediators of Spin Currents and Quantum Information (2015)

Bobby Antonio, Abolfazl Bayat, Sanjeev Kumar, Michael Pepper, and Sougato Bose

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-21

Beschreibung: Author(s): Bobby Antonio, Abolfazl Bayat, Sanjeev Kumar, Michael Pepper, and Sougato Bose Technological applications of many-body structures that emerge in gated devices under minimal control are largely unexplored. Here we show how emergent Wigner crystals in a semiconductor quantum wire can facilitate a pivotal requirement for a scalable quantum computer, namely, transmitting quantum i… [Phys. Rev. Lett. 115, 216804] Published Fri Nov 20, 2015

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

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Thema: Physik

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Topological Edge States with Zero Hall Conductivity in a Dimerized Hofstadter Model (2015)

Alexander Lau, Carmine Ortix, and Jeroen van den Brink

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-11-21

Beschreibung: Author(s): Alexander Lau, Carmine Ortix, and Jeroen van den Brink The Hofstadter model is a simple yet powerful Hamiltonian to study quantum Hall physics in a lattice system, manifesting its essential topological states. Lattice dimerization in the Hofstadter model opens an energy gap at half filling. Here we show that even if the ensuing insulator has a Chern num… [Phys. Rev. Lett. 115, 216805] Published Fri Nov 20, 2015

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

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Digitale ISSN: 1079-7114

Thema: Physik

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NLO corrections to double Higgs boson production in the Higgs singlet model (2015)

S. Dawson and I. M. Lewis

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-21

Beschreibung: Author(s): S. Dawson and I. M. Lewis Higgs pair production at the LHC from gluon fusion is small in the Standard Model but can be enhanced in models where a resonant enhancement is allowed. We examine the effect of a resonant contribution from a second scalar arising in a model with a gauge singlet scalar field in addition to the usual… [Phys. Rev. D 92, 094023] Published Fri Nov 20, 2015

Schlagwort(e): Strong Interactions

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Thema: Physik

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