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Effect of the spin-involved interaction of electrons with impurity atoms or defects to the transport properties of a two-dimensional electron gas is described by using a simplifying two-component model. Components representing spin-up and…

凝聚态物理 · 物理学 2007-05-23 P. Seba , P. Exner , K. N. Pichugin , P. Streda

The transport properties of a system of two interacting dots, one of them directly connected to the leads constituting a side-coupled configuration (SCD), are studied in the weak and strong tunnel-coupling limits. The conductance behavior…

介观与纳米尺度物理 · 物理学 2009-11-10 V. M. Apel , Maria A. Davidovich , E. V. Anda , G. Chiappe , C. A. Busser

The zero temperature transport properties of two-dimensional lattice systems with static random magnetic flux per plaquette and zero mean are investigated numerically. We study the two-terminal conductance and its dependence on energy,…

介观与纳米尺度物理 · 物理学 2010-10-01 P. Markos , L. Schweitzer

We study the hopping transport of a quantum particle through finite, randomly diluted percolation clusters in two dimensions. We investigate how the transmission coefficient T behaves as a function of the energy E of the particle, the…

统计力学 · 物理学 2007-05-23 E. Cuansing , H. Nakanishi

We provide a simple set of rules for predicting interference effects in off-resonant transport through single-molecule junctions. These effects fall in two classes, showing respectively an odd or an even number of nodes in the linear…

介观与纳米尺度物理 · 物理学 2014-09-12 Kim G. L. Pedersen , Mikkel Strange , Martin Leijnse , Per Hedegård , Gemma Solomon , Jens Paaske

We introduce two dimensional fermionic band models with two orbitals per lattice site, or one spinful orbital, and which have a non-zero topological Chern number that can be changed by varying the ratio of hopping parameters. A…

强关联电子 · 物理学 2013-02-14 Miguel A. N. Araújo , Eduardo V. Castro , Pedro D. Sacramento

We consider one-dimensional transport through an interacting region in series with a point-like one-body scatterer. When the conductance of the interacting region is perfect, independently of the interaction strength, a nonlocal interaction…

介观与纳米尺度物理 · 物理学 2008-11-27 Dietmar Weinmann , Rodolfo A. Jalabert , Axel Freyn , Gert-Ludwig Ingold , Jean-Louis Pichard

We investigate the influence of electron-electron interactions on the conductance of two-dimensional disordered spinless electrons. By using an efficient numerical method which is based on exact diagonalization in a truncated basis of…

强关联电子 · 物理学 2009-10-31 Thomas Vojta , Frank Epperlein , Michael Schreiber

The conductance of a molecular junction is commonly determined by either charge-transfer-doping, where alignment of the Fermi energy to the molecular levels is achieved, or tunnelling through the tails of molecular resonances within the…

介观与纳米尺度物理 · 物理学 2016-08-31 R. Gutierrez , G. Fagas , K. Richter , F. Grossmann , R. Schmidt

We study the two-band model of spinless fermions in one dimension for weak repulsive interactions. In this case, the model is equivalent to the weakly interacting spinless two-leg ladder. We obtain analytic expressions for the…

强关联电子 · 物理学 2009-10-31 Urs Ledermann , Karyn Le Hur

We address the problem of transmission of electrons between two noninteracting leads through a region where they interact (quantum dot). We use a model of spinless electrons hopping on a one-dimensional lattice and with an interaction on a…

介观与纳米尺度物理 · 物理学 2009-11-13 Abhishek Dhar , Diptiman Sen , Dibyendu Roy

We study a steady state non-equilibrium transport between two interacting helical edge states of a two dimensional topological insulator, described by helical Luttinger liquids, through a quantum dot. For non-interacting dot the current is…

强关联电子 · 物理学 2013-09-02 Sung-Po Chao , Salman A. Silotri , Chung-Hou Chung

We study tilted chains of spinless fermions in the presence of the nearest-neighbor density-density interaction for which the noninteracting counterpart displays Stark localization. We demonstrate that the latter two-body interaction can be…

强关联电子 · 物理学 2024-09-30 Bartosz Krajewski , Marcin Mierzejewski

We investigate how the different velocities characterizing the low-energy spectral properties and the low-temperature thermodynamics of one-dimensional correlated electron systems (Luttinger liquids) affect the transport properties of…

强关联电子 · 物理学 2009-11-13 S. Friederich , V. Meden

The finite-frequency transport properties of a large-spin molecule attached to ferromagnetic contacts are studied theoretically in the Kondo regime. The focus is on the behavior of the dynamical conductance in the linear response regime,…

介观与纳米尺度物理 · 物理学 2017-05-03 Anna Płomińska , Maciej Misiorny , Ireneusz Weymann

We consider an exclusion process on a ring in which a particle hops to an empty neighbouring site with a rate that depends on the number of vacancies $n$ in front of it. In the steady state, using the well known mapping of this model to the…

统计力学 · 物理学 2014-12-30 Priyanka , Arvind Ayyer , Kavita Jain

We study transport through a strongly correlated quantum dot and show that Coulomb blockade can appear even in the presence of perfect contacts. This conclusion arises from numerical calculations of the conductance for a microscopic model…

强关联电子 · 物理学 2007-05-23 Gabriel Vasseur , Dietmar Weinmann , Rodolfo A. Jalabert

A variant of coupled-cluster theory is described here, wherein the degrees of freedom are fluctuations of fragments between internally correlated states. The effects of intra-fragment correlation on the inter-fragment interaction are…

化学物理 · 物理学 2019-05-24 Yuhong Liu , Anthony D. Dutoi

We propose and study the charge transport through single and double quantum point contacts setup between helical Majorana modes and an interacting helical Luttinger liquid. We show that the differential conductance decreases for stronger…

强关联电子 · 物理学 2015-06-17 Sung-Po Chao , Thomas L. Schmidt , Chung-Hou Chung

Particle transport through an open, discrete 1-D channel against a mechanical or chemical bias is analyzed within a master equation approach. The channel, externally driven by time dependent site energies, allows multiple occupation due to…

统计力学 · 物理学 2015-05-18 Mario Einax , Gemma Solomon , Wolfgang Dieterich , Abraham Nitzan