Proceedings of nanoGe Fall Meeting19 (NFM19)
DOI: https://doi.org/10.29363/nanoge.nfm.2019.095
Publication date: 18th July 2019
Two-dimensional (2D) semiconductors, such as transition metal dichalcogenides (TMDCs), are emerging platforms for exploring a broad range of electronic, optoelectronic, and quantum phenomena. These materials feature strong Coulombic interactions, making them ideal for studying highly correlated phenomena as a function of charge-carrier density. In this talk, I will discuss our recent effort in understanding dynamics at the 2D limit. Using a range of model systems, including TMDC hetero-bilayers, 2D superatomic semiconductors, and 2D magnetic materials, I will discuss how the strong Coulomb interaction is manifested in manybody dynamics, including spin-valley specific scattering, Mott transitions, and electron-phonon coupling. I will address the prospects of quantum fluid phases, such as exciton condensates and 2D superconductivity. Finally, I will discuss the exciting, but somewhat controversial topic of Moire excitons at TMDC heterojunctions, specifically, how fragile the Miore potentials are to sample conditions, such as strain and interfacial contamination. The difficulty in characterizing the detailed sample conditions means that one must exercise caution in attributing spectroscopic findings to Moire excitons.
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