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Title: Interaction-induced backscattering in short quantum wires

We study interaction-induced backscattering in clean quantum wires with adiabatic contacts exposed to a voltage bias. Particle backscattering relaxes such systems to a fully equilibrated steady state only on length scales exponentially large in the ratio of bandwidth of excitations and temperature. Here in this paper we focus on shorter wires in which full equilibration is not accomplished. Signatures of relaxation then are due to backscattering of hole excitations close to the band bottom which perform a diffusive motion in momentum space while scattering from excitations at the Fermi level. This is reminiscent to the first passage problem of a Brownian particle and, regardless of the interaction strength, can be described by an inhomogeneous Fokker-Planck equation. From general solutions of the latter we calculate the hole backscattering rate for different wire lengths and discuss the resulting length dependence of interaction-induced correction to the conductance of a clean single channel quantum wire.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Freie Univ., Berlin (Germany). Dahlem Center for Complex Quantum Systems and Inst. fur Theoretische Physik
  2. Freie Univ., Berlin (Germany). Dahlem Center for Complex Quantum Systems and Inst. fur Theoretische Physik; Brazilian Center for Physics Research, Rio de Janeiro (Brazil)
  3. Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy; Karlsruhe Inst. of Technology (KIT) (Germany). Inst. fur Nanotechnologie
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
OSTI Identifier:
1357037
Grant/Contract Number:
AC02-06CH11357; DMR-1401908
Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 90; Journal Issue: 16; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); National Counsel of Technological and Scientific Development (CNPq)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE