Trigonal distortion of topologically confined channels in bilayer graphene

In this work, we show that the trigonal warping of the electronic bands in bilayer graphene dramatically modifies the behavior of the topologically confined one-dimensional modes due to an inhomogeneous bias that changes sign across a channel. Up to four zero modes are present, depending on the orie...

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Veröffentlicht in:Applied physics letters 2011-06, Vol.98 (26), p.262107-262107-3
Hauptverfasser: Núñez, A. S., Suárez Morell, E., Vargas, P.
Format: Artikel
Sprache:eng
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Zusammenfassung:In this work, we show that the trigonal warping of the electronic bands in bilayer graphene dramatically modifies the behavior of the topologically confined one-dimensional modes due to an inhomogeneous bias that changes sign across a channel. Up to four zero modes are present, depending on the orientation of the channel, these zero modes are related to a fractionalization of the topological charge due to the trigonal warping.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3605568