Magnetic-field effects on the transport properties of one-sided rough wires

A. García-Martín, M. Governale, and P. Wölfle
Phys. Rev. B 66, 233307 – Published 16 December 2002
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Abstract

We present a detailed numerical analysis of the effect of a magnetic field on the transport properties of a “small-N” one-sided surface disordered wire. When time-reversal symmetry is broken due to a magnetic field B, we find a strong increase with B not only of the localization length ξ but also of the mean free path l caused by boundary states. Despite this, the universal relationship between l and ξ does hold. We also analyze the conductance distribution at the metal-insulator crossover, finding very good agreement with random matrix theory with two fluctuating channels within the circular orthogonal (unitary) ensemble in the absence (presence) of B.

  • Received 18 September 2002

DOI:https://doi.org/10.1103/PhysRevB.66.233307

©2002 American Physical Society

Authors & Affiliations

A. García-Martín1, M. Governale2, and P. Wölfle1

  • 1Institut für Theorie der Kondensierten Materie, Universität Karlsruhe, P.O. Box 6980, D-76128 Karlsruhe, Germany
  • 2Institut für Theoretische Festkörperphysik, Universität Karlsruhe, D-76128 Karlsruhe, Germany

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Vol. 66, Iss. 23 — 15 December 2002

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