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

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

2006-07-28

arxiv.org/abs/cond-mat/0607758v3

Phys. Rev. B 75, 033315 (2007).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 6 figures, discussion of charging effect changed

Scientific paper

10.1103/PhysRevB.75.033315

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 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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