Interplay of crystal thickness and in-plane anisotropy and evolution of quasi-one-dimensional electronic character in ReSe2

Article

关键词: ATOMICALLY THIN;    FEW-LAYER;    RHENIUM;    TRANSITION;    POLARIZATION;    SPECTROSCOPY;    OPTOELECTRONICS;    MONOLAYER;    EXCITONS;    SPECTRA;   

DOI  :  10.1103/PhysRevB.104.035421

来源: SCIE

【 摘 要 】

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 similar to 200 meV for the bulk to similar 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.

【 授权许可】

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