Rashba and intrinsic spin-orbit interactions in biased bilayer graphene

Details Rashba and intrinsic spin-orbit interactions in biased bilayer graphene Rashba and intrinsic spin-orbit interactions in biased bilayer graphene

2009-11-04

arxiv.org/abs/0911.0857v2

Phys. Rev. B 81, 125435 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 10 figures

Scientific paper

10.1103/PhysRevB.81.125435

We investigate the effect that the intrinsic spin-orbit and the inter- and intra-layer Rashba interactions have on the energy spectrum of either an unbiased or a biased graphene bilayer. We find that under certain conditions, a Dirac cone is formed out of a parabolic band and that it is possible to create a "Mexican hat"-like energy dispersion in an unbiased bilayer. In addition, in the presence of only an intralayer Rashba interaction, the K (K') point splits into four distinct ones, contrarily to the case in single-layer graphene, where the splitting also takes place, but the low-energy dispersion at these points remains identical.

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