Twist angle control of excited states in transition metal dichalcogenide bilayers
Invited
Abstract
A new type of superlattice, known as the moiré superlattice, form when two monolayers of van der Waals materials are vertically stacked. A periodic energy modulation, as well as distinct optical selection rules, gives rise to rich optical properties. In this talk, I will discuss how the twist angle controls the exciton resonances, lifetimes, diffusion in transition metal dichalcogenide heterobilayers. It is possible to control the twist angle with a higher degree of accuracy in homobilayers, we show that lattice reconstruction occurs over a rather large range, as manifested in Raman spectra.
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Presenters
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Xiaoqin (Elaine) Li
University of Texas at Austin, Physics, University of Texas at Austin, Department of Physics, University of Texas at Austin, U.T. Austin, Department of Physics, The University of Texas at Austin, Department of Physics, Center of Complex Quantum Systems, University of Texas at Austin
Authors
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Xiaoqin (Elaine) Li
University of Texas at Austin, Physics, University of Texas at Austin, Department of Physics, University of Texas at Austin, U.T. Austin, Department of Physics, The University of Texas at Austin, Department of Physics, Center of Complex Quantum Systems, University of Texas at Austin