Trigonal warping and anisotropic band splitting in monolayer graphene due to Rashba spin-orbit coupling

Rakyta, Peter and Kormanyos, Andor and Cserti, József (2010) Trigonal warping and anisotropic band splitting in monolayer graphene due to Rashba spin-orbit coupling. Physical review B, 82 (11). ISSN 1098-0121

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Abstract

We study the electronic band structure of monolayer graphene when Rashba spin-orbit coupling is present. We show that if the Rashba spin-orbit coupling is stronger than the intrinsic spin-orbit coupling, the low-energy bands undergo trigonal-warping deformation and that for energies smaller than the Lifshitz energy, the Fermi circle breaks up into separate parts. The effect is very similar to what happens in bilayer graphene at low energies. We discuss the possible experimental implications, such as threefold increase in the minimal conductivity for low electron densities, anisotropic, wave-number-dependent spin splitting of the bands, and the spin-polarization structure.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Additional Information:
© 2010 The American Physical Society
ID Code:
50001
Deposited By:
Deposited On:
28 Sep 2011 15:16
Refereed?:
Yes
Published?:
Published
Last Modified:
28 Oct 2020 02:40