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Van Hove Singularities and Excitonic Effects in the Optical Conductivity of Twisted Bilayer Graphene
Robin W. Havener, Yufeng Liang, Lola Brown +2
We report a systematic study of the optical conductivity of twisted bilayer graphene (tBLG) across a large energy range (1.2 eV to 5.6 eV) for various twist angles, combined with f…
Quasiparticle band-edge energy and band offsets of monolayer of molybdenum and tungsten chalcogenide
Yufeng Liang, Shouting Huang, Ryan Soklaski +1
We report the quasiparticle energy of monolayer of molybdenum and tungsten dichalcogenides, MX2 (M=Mo, W; X=S, Se, Te). Beyond calculating bandgaps, we have achieved converged abso…
Exciton Energy Spectra in Two-Dimensional Graphene Derivatives
Shouting Huang, Yufeng Liang, Li Yang
The energy spectra and wavefunctions of bound excitons in important two-dimensional (2D) graphene derivatives, i.e., graphyne and graphane, are found to be strongly modified by qua…
Topological kink states at a tilt boundary in gated multi-layer graphene
Abolhassan Vaezi, Yufeng Liang, Darryl H. Ngai +2
The search for new realization of topologically protected edge states is an active area of research. We show that a tilt boundary in gated multi-layer graphene supports topological…