Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-05-17
Phys. Rev. B 82, 113405 (2010)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
minor changes in the manuscript, a relevant experimental reference is added
Scientific paper
10.1103/PhysRevB.82.113405
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 of the minimal conductivity for low electron densities, the wavenumber dependence of the band splitting and the spin polarization structure. Our theoretical predictions are in agreement with recent experimental results.
Cserti József
Kormanyos Andor
Rakyta Peter
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