期刊
SOLID STATE COMMUNICATIONS
卷 149, 期 27-28, 页码 1061-1067出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2009.02.055
关键词
Graphene; Edge states; Bulk-edge correspondence; Berry phases
There are two types of edge states in graphene with/without magnetic field. One is a quantum Hall edge state, which is topologically protected against small perturbation. The other is a chiral zero mode that is localized near the boundary with/without magnetic field. The latter is also topological but is guaranteed to be at zero energy by the chiral symmetry, which is also responsible for massless Dirac-like dispersion. Conceptual roles of the edge states are stressed and reviewed from the point of view of the bulk-edge correspondence and topological order. (C) 2009 Elsevier Ltd. All rights reserved.
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