Journal
PHYSICAL REVIEW B
Volume 79, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.241304
Keywords
Aharonov-Bohm effect; Coulomb blockade; Fabry-Perot interferometers; magnetoresistance; oscillations; quantum Hall effect
Funding
- Microsoft Corporation Project Q, IBM, NSF [DMR-0501796]
- Center for Nanoscale Systems at Harvard University
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Two 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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