Polarization-sensitive absorption of THz radiation by interacting electrons in chirally stacked multilayer graphene

Details Polarization-sensitive absorption of THz radiation by interacting electrons in chirally stacked multilayer graphene Polarization-sensitive absorption of THz radiation by interacting electrons in chirally stacked multilayer graphene

2012-02-10

arxiv.org/abs/1202.2302v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 6 figs

Scientific paper

We show that opacity of a clean multilayer graphene flake depends on the helicity of the circular polarized electromagnetic radiation. The effect can be understood in terms of the pseudospin selection rules for the interband optical transitions in the presence of exchange electron-electron interactions which alter the pseudospin texture in momentum space. The interactions described within a semi-analytical Hartree--Fock approach lead to the formation of the topologically different broken--symmetry states characterized by Chern numbers and zero-field anomalous Hall conductivities.

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