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We study electronic transport through a quantum point contact, where the interaction between the electrons is approximated by a contact potential. Our numerical approach is based on the non-equilibrium Green function technique which is…

介观与纳米尺度物理 · 物理学 2007-05-23 Andreas Lassl , Peter Schlagheck , Klaus Richter

We present an analysis of the transient electronic and transport properties of a nanojunction in the presence of electron-electron and electron-phonon interactions. We introduce a novel numerical approach which allows for an efficient…

介观与纳米尺度物理 · 物理学 2018-09-13 R. Seoane Souto , R. Avriller , A. Levy Yeyati , A. Martín-Rodero

We demonstrate an efficient nonequilibrium Green's function transport calculation procedure based on the real-space finite-difference method. The direct inversion of matrices for obtaining the self-energy terms of electrodes is…

材料科学 · 物理学 2024-01-09 Tomoya Ono , Yoshiyuki Egami , Kikuji Hirose

Electronic transport is theoretically investigated in laterally confined semiconductor superlattices using the formalism of non-equilibrium Green's functions. The transport properties are calculated for nanowire superlattices of varying…

介观与纳米尺度物理 · 物理学 2014-04-25 Thomas Grange

Quantum transport through single molecules is very sensitive to the strength of the molecule-electrode contact. Here, we investigate the behavior of a model molecular junction weakly coupled to external electrodes in the case where charging…

介观与纳米尺度物理 · 物理学 2009-11-11 Bo Song , Dmitry A. Ryndyk , Gianaurelio Cuniberti

We consider the electron transport properties through fully interacting nanoscale junctions beyond the linear-response regime. We calculate the current flowing through an interacting region connected to two interacting leads, with…

介观与纳米尺度物理 · 物理学 2012-04-26 H. Ness , L. K. Dash

Motivated by recent experiments on nonlocal transport through multiterminal superconducting hybrid structures, we present self-consistent calculations based on quasiclassical Green's functions for the order parameter, currents and voltages…

超导电性 · 物理学 2015-05-13 F. S. Bergeret , A. Levy Yeyati

We investigate the interplay of quantum interference effects and electronic-vibrational coupling in electron transport through single-molecule junctions, employing a nonequilibrium Green's function approach. Our findings show that inelastic…

介观与纳米尺度物理 · 物理学 2013-02-18 R. Härtle , M. Butzin , M. Thoss

We consider a quantum dot, affected by a local vibrational mode and contacted to macroscopic leads, in the non-equilibrium steady-state regime. We apply a variational Lang-Firsov transformation and solve the equations of motion of the Green…

强关联电子 · 物理学 2015-05-28 T. Koch , J. Loos , A. Alvermann , H. Fehske

We study dynamic nonequilibrium electron charging phenomena in ballistic molecular devices at room temperature that compromise their response to bias and whose nature is evidently distinguishable from static Schottky-type potential…

介观与纳米尺度物理 · 物理学 2008-05-13 Ioannis Deretzis , Antonino La Magna

The effect of electron-electron scattering on the equilibrium properties of few-electron quantum dots is investigated by means of nonequilibrium Green's functions theory. The ground and equilibrium state is self-consistently computed from…

介观与纳米尺度物理 · 物理学 2013-05-29 K. Balzer , M. Bonitz , R. van Leeuwen , N. E. Dahlen , A. Stan

Quantum dots are versatile systems for exploring quantum transport, electron correlations, and many-body phenomena such as the Kondo effect. While equilibrium properties are well understood through methods like the numerical renormalization…

强关联电子 · 物理学 2026-01-06 Gustavo Diniz , Silvio Quintino , Vivian V. França

We study the nonlinear elastic quantum electronic transport properties of nanoscopic devices using the Nonequilibrium Green's function (NEGF) method. The Green's function method allows us to expand the $I-V$ characteristics of a given…

介观与纳米尺度物理 · 物理学 2009-07-14 Alexis R. Hernández , Caio H. Lewenkopf

We formulate a semiclassical theory for electron transport in open quantum systems with electron-phonon interactions adequate for situations when the system's phonon dynamics is comparable with the electron transport timescale. Starting…

介观与纳米尺度物理 · 物理学 2025-08-26 Maicol A. Ochoa

An efficient implementation of the nonequilibrium Green function (NEGF) method combined with the density functional theory (DFT) using localized pseudo-atomic orbitals (PAOs) is presented for electronic transport calculations of a system…

介观与纳米尺度物理 · 物理学 2015-05-14 Taisuke Ozaki , Kengo Nishio , Hiori Kino

We present a formulation of a nonequilibrium Green's function method for thermal current in nanojunction atomic systems with nonlinear interactions. This first-principle approach is applied to the calculation of the thermal conductance in…

介观与纳米尺度物理 · 物理学 2007-05-23 Jian-Sheng Wang , Jian Wang , Nan Zeng

A self-consistent method for calculating electron transport through a molecular device is proposed. It is based on density functional theory electronic structure calculations under periodic boundary conditions and implemented in the…

介观与纳米尺度物理 · 物理学 2007-05-23 San-Huang Ke , Harold U. Baranger , Weitao Yang

We use the effective-mass approximation and the density-functional theory with the local-density approximation for modeling two-dimensional nano-structures connected phase-coherently to two infinite leads. Using the non-equilibrium Green's…

介观与纳米尺度物理 · 物理学 2009-11-10 Paula Havu , Ville Havu , Martti Puska , Risto Nieminen

We pioneerly investigate the non-equilibrium transport near a quantum phase transition in a generic and relatively simple case model, the dissipative resonant level model, that has many ramifications in nanosystems. We formulate a rigorous…

介观与纳米尺度物理 · 物理学 2015-05-13 Chung-Hou Chung , Karyn Le Hur , Matthias Vojta , Peter Wölfle

We study correlation effects on the transport through a quantum dot superlattice using a two-dimensional Hubbard model connected to two noninteracting leads. To calculate the zero-temperature conductance away from half-filling, we have used…

介观与纳米尺度物理 · 物理学 2007-05-23 Yoshihide Tanaka , Akira Oguri