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Interplay of crystal thickness and in-plane anisotropy and evolution of quasi-one dimensional electronic character in ReSe<sub>2</sub>
Lewis Hart, Surani Gunasekera, Marcin Mucha-Kruczynski, James Webb, Jose Avila, Maria-Carmen Asensio, Daniel Wolverson
OAI: oai:purehost.bath.ac.uk:publications/60250703-56f8-45f9-872e-a72139ff43bf • DOI: https://doi.org/10.1103/PhysRevB.104.035421
Abstract
We study the valence band structure of ReSe2 crystals with varying thickness down to a single layer using nanoscale angle-resolved photoemission spectroscopy and density functional theory. The width of the top valence band in the direction perpendicular to the rhenium chains decreases with decreasing number of layers, from ~200 meV for the bulk to ~80 meV for monolayer. This demonstrates increase of in-plane anisotropy induced by changes in the interlayer coupling and suggests progressively more one-dimensional character of electronic states in few-layer rhenium dichalcogenides.