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Optical Conductivity of Twisted Bilayer Graphene
Calvin J. Tabert, Elisabeth J. Nicol
We calculate the finite-frequency conductivity of bilayer graphene with a relative twist between the layers. The low frequency response at zero doping shows a flat conductivity wit…
Optical Signatures of the Tunable Band Gap and Valley-Spin Coupling in Silicene
Lukas Stille, Calvin J. Tabert, Elisabeth J. Nicol
We investigate the optical response of the silicene and similar materials, such as germanene, in the presence of an electrically tunable band gap for variable doping. The interplay…
Dynamical conductivity of AA-stacked bilayer graphene
Calvin J. Tabert, Elisabeth J. Nicol
We calculate the dynamical conductivity of AA-stacked bilayer graphene as a function of frequency and in the presence of a finite chemical potential due to charging. Unlike the mon…