Features due to spin-orbit coupling in the optical conductivity of single-layer graphene

Details Features due to spin-orbit coupling in the optical conductivity of single-layer graphene Features due to spin-orbit coupling in the optical conductivity of single-layer graphene

2009-11-04

arxiv.org/abs/0911.0754v2

Phys. Rev. B 81, 035421 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 5 figures, RevTex4; v2: added/updated references, changed figures, extended Introduction section; to appear in PRB

Scientific paper

10.1103/PhysRevB.81.035421

We have calculated the optical conductivity of a disorder-free single graphene sheet in the presence of spin-orbit coupling, using the Kubo formalism. Both intrinsic and structural-inversion-asymmetry induced types of spin splitting are considered within a low-energy continuum theory. Analytical results are obtained that allow us to identify distinct features arising from spin-orbit couplings. We point out how optical-conductivity measurements could offer a way to determine the strengths of spin splitting due to various origins in graphene.

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