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- Title
Band gap and broken chirality in single-layer and bilayer graphene.
- Authors
Varlet, Anastasia; Liu, Ming ‐ Hao; Bischoff, Dominik; Simonet, Pauline; Taniguchi, Takashi; Watanabe, KENji; Richter, Klaus; Ihn, Thomas; Ensslin, Klaus
- Abstract
Chirality is one of the key features governing the electronic properties of single- and bilayer graphene: the basics of this concept and its consequences on transport are presented in this review. By breaking the inversion symmetry, a band gap can be opened in the band structures of both systems at the K-point. This leads to interesting consequences for the pseu-dospin and, therefore, for the chirality. These consequences can be accessed by investigating the evolution of the Berry phase in such systems. Experimental observations of Fabry-Pérot interference in a dual-gated bilayer graphene device are finally presented and are used to illustrate the role played by the band gap on the evolution of the pseudospin. The presented results can be attributed to the breaking of the chirality in the energy range close to the gap. (© 2015 WILEY-VCH Verlag GmbH &Co. KGaA, Weinheim)
- Subjects
GRAPHENE; SOLID state physics; CHIRALITY; BAND gaps; FABRY-Perot interferometers
- Publication
Physica Status Solidi - Rapid Research Letters, 2016, Vol 10, Issue 1, p46
- ISSN
1862-6254
- Publication type
Article
- DOI
10.1002/pssr.201510180