Journal
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
Volume 10, Issue 1, Pages 46-57Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssr.201510180
Keywords
graphene; bilayers; chirality; Fabry-Perot interference; band gaps; pseudospins; Berry phase
Funding
- Marie Curie ITN S3NANO
- Marie Curie ITN QNET
- Swiss National Science Foundation via NCCR Quantum Science and Technology
- Graphene Flagship
- Deutsche Forschungsgemeinschaft [SFB 689]
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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 pseudospin 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-Perot 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. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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