Pachos, J.K., Stone, M. and Temme, K. (2008) Graphene with geometrically induced vorticity. Physical Review Letters, 100 (15). p. 156806. ISSN 1079-7114
Abstract
At half filling, the electronic structure of graphene can be modeled by a pair of free two-dimensional Dirac fermions. We explicitly demonstrate that in the presence of a geometrically induced gauge field an everywhere-real Kekulé modulation of the hopping matrix elements can correspond to a nonreal Higgs field with nontrivial vorticity. This provides a natural setting for fractionally charged vortices with localized zero modes. For fullerenelike molecules we employ the index theorem to demonstrate the existence of six low-lying states that do not depend strongly on the Kekulé-induced mass gap.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2008 Amer Physical Soc. This is an author produced version of a paper published in Physical Review Letters .Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) |
Depositing User: | Sherpa Assistant |
Date Deposited: | 16 May 2008 15:43 |
Last Modified: | 16 Nov 2016 14:07 |
Published Version: | http://dx.doi.org/10.1103/PhysRevLett.100.156806 |
Status: | Published |
Publisher: | American Physical Society |
Identification Number: | 10.1103/PhysRevLett.100.156806 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:3797 |