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We present a technique to calculate the transport properties through one-dimensional models of molecular wires. The calculations include inelastic electron scattering due to electron-lattice interaction. The coupling between the electron…

Condensed Matter · Physics 2009-10-31 H. Ness , S. A. Shevlin , A. J. Fisher

To realize braiding of vortex lines and understand the basic properties of the energy landscape for vortex motion, precise manipulation of superconducting vortices on the nanoscale is required. Here, we reveal that a localized trapping…

Charge transport through a small topological superconducting island in contact with a normal and a superconducting electrode occurs through a cycle that involves coherent oscillations of Cooper pairs and tunneling in/out the normal…

Mesoscale and Nanoscale Physics · Physics 2013-07-25 Nicolas Didier , Marco Gibertini , Ali G. Moghaddam , Jürgen König , Rosario Fazio

In a solid, transport of electricity can occur via electrons or via holes. In the normal state no experiment can determine unambiguously whether the elementary mobile carriers have positive or negative charge. This is no longer true in the…

Superconductivity · Physics 2009-11-07 J. E. Hirsch

We study some functionals that describe the density of vortex lines in superconductors subject to an applied magnetic field, and in Bose-Einstein condensates subject to rotational forcing, in quite general domains in 3 dimensions. These…

Mathematical Physics · Physics 2015-06-03 Sisto Baldo , Robert L. Jerrard , Giandomenico Orlandi , H. Mete Soner

We experimentally investigate electron transport through the interface between a superconductor and the edge of a two-dimensional electron system with band inversion. The interface is realized as a tunnel NbN side contact to a narrow 8~nm…

Mesoscale and Nanoscale Physics · Physics 2015-06-23 A. Kononov , S. V. Egorov , N. Titova , Z. D. Kvon , N. N. Mikhailov , S. A. Dvoretsky , E. V. Deviatov

We consider superconductivity nucleation in multiply connected mesoscopic samples such as thin-walled cylinders or rings placed in electrical contact with a ferromagnet. The superconducting critical temperature and order parameter structure…

Superconductivity · Physics 2009-11-29 A. V. Samokhvalov , A. S. Mel'nikov , A. I. Buzdin

Electronic transport through a single-molecule magnet Mn$_{12}$ in a two-terminal set up is calculated using the non-equilibrium Green's function method in conjunction with density-functional theory. A single-molecule magnet Mn$_{12}$ is…

Materials Science · Physics 2010-01-28 Salvador Barraza-Lopez , Kyungwha Park , Víctor García-Suárez , Jaime Ferrer

A multilayered structure with a single superconductor layer and a single insulator layer formed on a bulk superconductor is studied. General formulae for the vortex-penetration field of the superconductor layer and the magnetic field on the…

Accelerator Physics · Physics 2014-01-30 Takayuki Kubo , Yoshihisa Iwashita , Takayuki Saeki

Vortices play a crucial role in determining the properties of superconductors as well as their applications. Therefore, characterization and manipulation of vortices, especially at the single vortex level, is of great importance. Among many…

We present a new formulation to calculate the electric conductance of mesoscopic conductors by utilizing the singular value decomposition, which is a mathematical technique to manipulate matrices. Our formulation is useful in treating…

Mesoscale and Nanoscale Physics · Physics 2014-12-30 Masahiko Hayashi

Electrical transport measurements using a multiterminal configuration are presented, which prove that in BSCCO single crystals near the transition temperature in zero external magnetic field the secondary voltage is induced by thermally…

Superconductivity · Physics 2009-11-11 K. Vad , S. Meszaros , I. Nandori , B. Sas

In order to clarify electronic states and energy dissipations due to a motion of a vortex core in pure FeSe, which is a candidate superconductor possessing a super-clean core, we measured the microwave surface impedance of pure FeSe single…

Images of flux vortices in superconductors acquired by transmission electron microscopy should allow a quantitative determination of their magnetic structure but so far, only visual comparisons have been made between experimental images and…

Superconductivity · Physics 2015-06-15 J. C. Loudon , C. J. Bowell , N. D. Zhigadlo , J. Karpinski , P. A. Midgley

Resistance in superconductors arises from the motion of vortices driven by flowing supercurrents or external electromagnetic fields and may be strongly affected by thermal or quantum fluctuations. The common expectation borne out in…

In a recent paper by Link, it was pointed out that the the standard picture of the neutron star core, composed of a mixture of a neutron superfluid and a proton type-II superconductor, is inconsistent with observations of long period…

High Energy Physics - Phenomenology · Physics 2009-11-10 Kirk B. W. Buckley , Max A. Metlitski , Ariel R. Zhitnitsky

We report on an experimental and theoretical study of nonlocal transport in superconductor hybrid structures, where two normal-metal leads are attached to a central superconducting wire. As a function of voltage bias applied to both…

Superconductivity · Physics 2013-11-15 S. Kolenda , M. J. Wolf , D. S. Golubev , A. D. Zaikin , D. Beckmann

We investigate the dynamics of a magnetic vortex driven by spin-transfer torque due to spin current in the adiabatic case. The vortex core represented by collective coordinate experiences a transverse force proportional to the product of…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Junya Shibata , Yoshinobu Nakatani , Gen Tatara , Hiroshi Kohno , Yoshichika Otani

Monte Carlo simulations of the uniformly frustrated 3d XY model are used to model vortex line fluctuations in high temperature superconductors in an applied magnetic field. We find two distinct phase transitions. At a lower T_{c\perp}, the…

Condensed Matter · Physics 2009-10-22 Ying-Hong Li , S. Teitel

In this work, a new theoretical approach to study the non-equilibrium transport properties of nanoscale systems coupled to metallic electrodes with strong electron-phonon interactions is presented. The proposed approach consists in a…

Mesoscale and Nanoscale Physics · Physics 2013-07-31 R. Seoane Souto , A. Levy Yeyati , A. Martín-Rodero , R. C. Monreal
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