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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