Decoherence and single electron charging in an electronic Mach-Zehnder interferometer

L. V. Litvin, H.-P. Tranitz, W. Wegscheider, and C. Strunk
Phys. Rev. B 75, 033315 – Published 25 January 2007

Abstract

We investigate the temperature and voltage dependence of the quantum interference in an electronic Mach-Zehnder interferometer using edge channels in the integer quantum-Hall regime. The amplitude of the interference fringes is significantly smaller than expected from theory; nevertheless the functional dependence of the visibility on temperature and bias voltage agrees very well with theoretical predictions. Superimposed on the Aharonov-Bohm (AB) oscillations, a conductance oscillation with a six times smaller period is observed. The latter depends only on gate voltage and not on the AB phase, and may be related to single electron charging.

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  • Received 7 November 2006

DOI:https://doi.org/10.1103/PhysRevB.75.033315

©2007 American Physical Society

Authors & Affiliations

L. V. Litvin*, H.-P. Tranitz, W. Wegscheider, and C. Strunk

  • Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany

  • *On leave form Institute of Semiconductor Physics, 630090, Novosibirsk, Russia.

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Issue

Vol. 75, Iss. 3 — 15 January 2007

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