Graphene Rings in Magnetic Fields: Aharonov-Bohm Effect and Valley Splitting

URN to cite this document:: urn:nbn:de:bvb:355-epub-79730
DOI to cite this document:: 10.5283/epub.7973

Wurm, Jürgen ; Wimmer, Michael ; Baranger, H. ; Richter, Klaus

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Date of publication of this fulltext: 05 Aug 2009 13:58

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Abstract

We study the conductance of mesoscopic graphene rings in the presence of a perpendicular magnetic field by means of numerical calculations based on a tight-binding model. First, we consider the magnetoconductance of such rings and observe the Aharonov-Bohm effect. We investigate different regimes of the magnetic flux up to the quantum Hall regime, where the Aharonov-Bohm oscillations are ...