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The mesoscopic chiral metal-insulator transition

  • Condensed Matter
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Abstract

Sharp localization transitions of chiral edge states in disordered quantum wires subject to a strong magnetic field are shown to be driven by crossovers from two-to one-dimensional localization of bulk states. As a result, the two-terminal conductance is found to exhibit discontinuous transitions at zero temperature between exactly integer plateau values and zero, reminiscent of first-order phase transitions. We discuss the corresponding phase diagram. The spin of the electrons is shown to result in a multitude of phases when the spin degeneracy is raised by the Zeeman energy. The width of conductance plateaus is found to depend sensitively on the spin flip rate 1/τs.

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Authors and Affiliations

  1. Institut fur Theoretische Physik, Universitat Hamburg, 20355, Hamburg, Germany

    S. Kettemann, B. Kramer & T. Ohtsuki

  2. Department of Physics, Sophia University, Chiyoda-Ku, 102-8554, Tokyo, Japan

    T. Ohtsuki

Authors
  1. S. Kettemann
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  2. B. Kramer
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  3. T. Ohtsuki
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Additional information

From Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 80, No. 4, 2004, pp. 316–320.

Original English Text Copyright © 2004 by Kettemann, Kramer, Ohtsuki.

This article was submitted by the author in English.

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Kettemann, S., Kramer, B. & Ohtsuki, T. The mesoscopic chiral metal-insulator transition. Jetp Lett. 80, 285–289 (2004). https://doi.org/10.1134/1.1813688

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  • DOI: https://doi.org/10.1134/1.1813688

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