Conductance oscillations due to a controllable impurity in a quantum box

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DOIResolve DOI: http://doi.org/10.1063/1.358447
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TypeArticle
Journal titleJournal of Applied Physics
Volume76
Issue8
Pages46764681; # of pages: 6
SubjectBOUND STATE; ELECTRIC CONDUCTIVITY; IMPURITIES; INTERFERENCE; NANOSTRUCTURES; OSCILLATIONS; QUANTIZATION; SEMICONDUCTOR DEVICES; TUNNEL EFFECT
AbstractWe present calculations of conductance in a multiply connected nanostructure with a quantum box geometry. Well-defined conductance oscillations appear which are attributed to the quantum interference effect in the presence of a controllable impurity in the quantum box. As the strength of the impurity potential is modulated, conductance oscillations arise from the constructive and destructive interference for the two electronic paths around the centrally located impurity and a third tunneling path through the impurity. We discuss the dependence of these oscillations on the size of the impurity, in terms of circulating or bound states in the quantum box formed by multiple reflections of the phase-coherent electron. The conductance oscillations are predicted to be strong for realistic structural parameters and robust against increasing temperature.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences
Peer reviewedNo
NPARC number12338121
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Record identifier12f75044-9b38-4345-8f57-99aebd10b52b
Record created2009-09-10
Record modified2016-05-09
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