Asymmetry in the Magnetoconductance of Metal Wires and Loops

A. D. Benoit, S. Washburn, C. P. Umbach, R. B. Laibowitz, and R. A. Webb
Phys. Rev. Lett. 57, 1765 – Published 6 October 1986
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Abstract

Universal conductance fluctuations in wires and Aharonov-Bohm oscillations in loops are not symmetric about H=0. The observation of asymmetry in the periodic oscillations is possible when the phase-coherence length of the wave function is comparable to the separation of the voltage probes. In both cases, four-probe measurements yield resistances which depend on lead configuration. The asymmetries appear like Hall voltages, and are consistent with Onsager's relations.

  • Received 2 June 1986

DOI:https://doi.org/10.1103/PhysRevLett.57.1765

©1986 American Physical Society

Authors & Affiliations

A. D. Benoit*, S. Washburn, C. P. Umbach, R. B. Laibowitz, and R. A. Webb

  • IBM T. J. Watson Research Center, Yorktown Heights, New York 10598

  • *Permanent address: Centre National de la Recherche Scientifique, Centre de Recherches sur les très Basses Températures, Grenoble, France.

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Vol. 57, Iss. 14 — 6 October 1986

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