Distinct Signatures for Coulomb Blockade and Aharonov-Bohm Interference in Electronic Fabry-Perot Interferometers
Levenson-Falk, Eli M.
Pfeiffer, Loren N.
West, Kenneth W.
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CitationZhang, Yiming, Douglas T. McClure, Eli M. Levenson-Falk, Charles Masamed Marcus, Loren N. Pfeiffer, and Kenneth W. West. 2009. Distinct signatures for Coulomb blockade and Aharonov-Bohm interference in electronic Fabry-Perot interferometers. Physical Review B 79(241304).
AbstractTwo distinct types of magnetoresistance oscillations are observed in two electronic Fabry-Perot interferometers of different sizes in the integer quantum Hall regime. Measuring these oscillations as a function of magnetic field and gate voltages, we describe three signatures that distinguish the two types. The oscillations observed in a \(2.0\mu m^2\) device are understood to arise from a Coulomb blockade mechanism and those observed in an \(18\mu m^2\) device from an Aharonov-Bohm mechanism. This work clarifies, provides ways to distinguish, and demonstrates control over these distinct mechanisms of oscillations seen in electronic Fabry-Perot interferometers.
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