TY - JOUR
T1 - Band gap and broken chirality in single-layer and bilayer graphene
AU - Varlet, Anastasia
AU - Liu, Ming Hao
AU - Bischoff, Dominik
AU - Simonet, Pauline
AU - Taniguchi, Takashi
AU - Watanabe, Kenji
AU - Richter, Klaus
AU - Ihn, Thomas
AU - Ensslin, Klaus
N1 - Publisher Copyright:
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - 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.
AB - 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.
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U2 - 10.1002/pssr.201510180
DO - 10.1002/pssr.201510180
M3 - Article
AN - SCOPUS:84955316082
SN - 1862-6254
VL - 10
SP - 46
EP - 57
JO - Physica Status Solidi - Rapid Research Letters
JF - Physica Status Solidi - Rapid Research Letters
IS - 1
ER -