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Two beam Aharonov–Bohm interference in the integer quantum Hall regime

DOI to cite this document:
Litvin, Leonid ; Helzel, Andreas ; Tranitz, Hans-Peter ; Wegscheider, Werner ; Strunk, Christoph
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Date of publication of this fulltext: 01 Feb 2010 12:58


We study an electronic Mach–Zehnder interferometer employing the edge channels of a two-dimensional electron gas (2DEG) in the quantum Hall regime and quantum point contacts (QPC) as beam splitters. The linear conductance of the QPC as a function of gate voltage shows resonances superimposed on quantized conductance steps. It was found that the visibility depends strongly on magnetic field and is highest near a filling factor of 1.5 in the interferometer arm.

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