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Conductivity in a disordered one-dimensional system of interacting fermions

O. S. Barišić and P. Prelovšek
Phys. Rev. B 82, 161106(R) – Published 29 October 2010

Abstract

Dynamical conductivity in a disordered one-dimensional model of interacting fermions is studied numerically at high temperatures and in the weak-interaction regime in order to find a signature of many-body localization and vanishing dc transport coefficients. On the contrary, we find in the regime of moderately strong local disorder that the dc conductivity σ0 scales linearly with the interaction strength while being exponentially dependent on the disorder. According to the behavior of the charge stiffness evaluated at the fixed number of particles, the absence of the many-body localization seems related to an increase in the effective localization length with the interaction.

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  • Received 1 September 2010

DOI:https://doi.org/10.1103/PhysRevB.82.161106

©2010 American Physical Society

Authors & Affiliations

O. S. Barišić1 and P. Prelovšek2,3

  • 1Institute of Physics, HR-10000 Zagreb, Croatia
  • 2J. Stefan Institute, SI-1000 Ljubljana, Slovenia
  • 3Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia

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Issue

Vol. 82, Iss. 16 — 15 October 2010

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