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Title: Proposal for a magnetic field induced graphene dot
Authors: Maksym, P.A.
Roy, Mervyn
Craciun, M.F.
Russo, S.
Yamamoto, M.
Tarucha, S.
Aoki, H.
First Published: 20-Sep-2010
Publisher: Institute of Physics (IOP)
Citation: Journal of Physics: Conference Series, 2010, 245 (1)
Abstract: Quantum dots induced by a strong magnetic field applied to a single layer of graphene in the perpendicular direction are investigated. The dot is defined by a model potential which consists of a well of depth ΔV relative to a flat asymptotic part and quantum states formed from the zeroth Landau level are considered. The energy of the dot states cannot be lower than −ΔV relative to the asymptotic potential. Consequently, when ΔV is chosen to be about half of the gap between the zeroth and first Landau levels, the dot states are isolated energetically in the gap between Landau level 0 and Landau level -1. This is confirmed with numerical calculations of the magnetic field dependent energy spectrum and the quantum states. Remarkably, an antidot formed by reversing the sign of ΔV also confines electrons but in the energy region between Landau level 0 and Landau level +1. This unusual behaviour gives an unambiguous signal of the novel physics of graphene quantum dots.
DOI Link: 10.1088/1742-6596/245/1/012030
ISSN: 1742-6588
eISSN: 1742-6596
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2010 IOP Publishing Ltd. All rights reserved. Archived with permission of the publisher and author.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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