Interplay of crystal thickness and in-plane anisotropy and evolution of quasi-one dimensional electronic character in ReSe${}_2$

Abstract

We study the valence band structure of ReSe${}_2$ 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 280 meV for the bulk to 61 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.

References in corpus (7)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Making graphene visible
• Broadband Linear-Dichroic Photodetector in a Black Phosphorus Vertical p-n Junction
• Tunable Quasiparticle Band Gap in Few Layer GaSe/graphene Van der Waals Heterostructures
• Indirect to direct gap crossover in two-dimensional InSe revealed by ARPES
• Search and design of nonmagnetic centrosymmetric layered crystals with large local spin polarization
• Visualizing Orbital Content of Electronic Bands in Anisotropic 2D Semiconducting ReSe${}_2$

Cited by in corpus (2)

• Spectrally resolving the phase and amplitude of coherent phonons in the charge density wave state of 1$T$-TaSe${}_2$
• Using in-plane anisotropy to engineer Janus monolayers of rhenium dichalcogenides