Abstract

Utilizing rectangular graphene quantum dots with zigzag horizontal boundaries as a paradigm, we find that the conductance of the dots can exhibit significant oscillations with the position of the leads. The oscillation patterns are a result of quantum interference determined by the band structure of the underlying graphene nanoribbon. In particular, the power spectrum of the conductance variation concentrates on a selective set of bands of the ribbon. The computational results are substantiated by a heuristic theory that provides selection rules for the concentration on the specific dispersion bands.

Original languageEnglish (US)
Article number58003
JournalEPL
Volume94
Issue number5
DOIs
StatePublished - Jun 1 2011

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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