Narrow-band anisotropic electronic structure of ReS2

DOI: 10.1103/PhysRevB.96.085205

Authors: D. Biswas (University of St. Andrews) , Alex M. Ganose (University College London; Diamond Light Source) , R. Yano (Tokyo Institute of Technology) , J. M. Riley (University of St. Andrews; Diamond Light Source) , L. Bawden (University of St. Andrews) , O. J. Clark (University of St. Andrews) , J. Feng (University of St. Andrews) , L. Collins-mcintyre (University of St. Andrews) , M. T. Sajjad (University of St. Andrews) , W. Meevasana (Suranaree University of Technology) , T. K. Kim (Diamond Light Source) , M. Hoesch (Diamond Light Source) , J. E. Rault (Synchrotron Soleil) , T. Sasagawa (Tokyo Institute of Technology) , David O. Scanlon (University College London; Diamond Light Source) , P. D. C. King (University of St Andrews)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 96

State: Published (Approved)
Published: August 2017
Diamond Proposal Number(s): 9500 , 11383

Abstract: We have used angle-resolved photoemission spectroscopy to investigate the band structure of ReS2, a transition-metal dichalcogenide semiconductor with a distorted 1T crystal structure. We find a large number of narrow valence bands, which we attribute to the combined influence of structural distortion and spin-orbit coupling. We further show how this leads to a strong in-plane anisotropy of the electronic structure, with quasi-one-dimensional bands reflecting predominant hopping along zigzag Re chains. We find that this does not persist up to the top of the valence band, where a more three-dimensional character is recovered with the fundamental band gap located away from the Brillouin zone center along kz. These experiments are in good agreement with our density-functional theory calculations, shedding light on the bulk electronic structure of ReS2, and how it can be expected to evolve when thinned to a single layer.

Journal Keywords: Band gap; Electronic structure; Fermi surface; Semiconductors; Transition-metal dichalcogenide; All-electron density functional calculations; Angle-resolved photoemission spectroscopy; Ultraviolet photoelectron spectroscopy

Subject Areas: Materials, Physics


Instruments: I05-ARPES

Other Facilities: SOLEIL