Electroconductance oscillations and quantum interference in ballistic nanostructures

Journal Article · Thu Apr 15 00:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.9948· OSTI ID:6630874

Joe, Y S; Ulloa, S E ^[1]

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1. Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701-2979 (United States)

We report theoretical studies of a quantum-interference phenomenon in ballistic nanometer-size constrictions analogous to the electrostatic Aharonov-Bohm effect. Modulating an applied-potential step [ital V][sub [ital T]] in one of the branches of a multiply connected system allows the observation of conductance oscillations, even in the absence of magnetic fields, as they are produced by quantum interference between voltage-shifted states in the different branches. Electric depopulation of subbands can also be seen at larger [ital V][sub [ital T]]. We show that these aperiodic oscillations are strong for realistic structural parameters, robust against increasing temperature, and compare well with the expected phase changes in a simple single-channel model.

• DOE Contract Number: FG02-87ER45334
• OSTI ID: 6630874
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 47:15; ISSN 0163-1829
• Country of Publication: United States
• Language: English

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360606* - Other Materials- Physical Properties- (1992-)