Geometry-dependent conductance oscillations in graphene quantum dots

Liang Huang, Rui Yang, Ying-Cheng Lai

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5 Citations (Scopus)

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. Copyright (C) EPLA, 2011

Original languageEnglish
Article number58003
Number of pages4
JournalEurophysics Letters
Volume94
Issue number5
DOIs
Publication statusPublished - Jun 2011

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