699 citations · 2.3k across the 34 of their papers we have counts for
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Upper limit on nonlinear optical processes: shift current and second harmonic generation in extended systems
Liang Z. Tan, Andrew M. Rappe
The response functions of a material characterize its behavior under external stimuli, such as electromagnetic radiation. Such responses may grow linearly with the amplitude of the…
Effective Mass in Bilayer Graphene at Low Carrier Densities: the Role of Potential Disorder and Electron-Electron Interaction
J. Li, L. Z. Tan, K. Zou +6
In a two-dimensional electron gas, the electron-electron interaction generally becomes stronger at lower carrier densities and renormalizes the Fermi liquid parameters such as the…
Enhancement of bulk photovoltaic effect in topological insulators
Liang Z. Tan, Andrew M. Rappe
We investigate the shift current bulk photovoltaic response of materials close to a band inversion topological phase transition. We find that the bulk photocurrent reverses directi…
Theory of the Raman spectrum of rotated double-layer graphene
Sinisa Coh, Liang Z. Tan, Steven G. Louie +1
We study theoretically the Raman spectrum of the rotated double-layer graphene, consisting of two graphene layers rotated with respect to each other by an arbitrary angle θ. We fin…
Resonant Excitation of Graphene K-Phonon and Intra-Landau-Level Excitons in Magneto-Optical Spectroscopy
M. Orlita, Liang Z. Tan, M. Potemski +5
Precise infrared magnetotransmission experiments have been performed in magnetic fields up to 32 T on a series of multilayer epitaxial graphene samples. We observe changes in the s…
Raman spectroscopy study of rotated double-layer graphene: Misorientation-angle dependence of electronic structure
Kwanpyo Kim, Sinisa Coh, Liang Z. Tan +7
We present a systematic Raman study of unconventionally-stacked double-layer graphene, and find that the spectrum strongly depends on the relative rotation angle between layers. Ro…