Loading...
research article
Non equilibrium anisotropic excitons in atomically thin ReS2
January 1, 2019
We present a systematic investigation of the electronic properties of bulk and few layer ReS2 van der Waals crystals using low temperature optical spectroscopy. Weak photoluminescence emission is observed from two non-degenerate band edge excitonic transitions separated by similar to 20 meV. The comparable emission intensity of both excitonic transitions is incompatible with a fully thermalized (Boltzmann) distribution of excitons, indicating the hot nature of the emission. While DFT calculations predict bilayer ReS2 to have a direct fundamental band gap, our optical data suggests that the fundamental gap is indirect in all cases.
Use this identifier to reference this record
Type
research article
Web of Science ID
WOS:000449203600003
Authors
Urban, J. M.
•
Baranowski, M.
•
•
Klopotowski, L.
•
•
Ma, Y.
•
Wlodarczyk, D.
•
Suchocki, A.
•
•
Heine, T.
Publication date
2019-01-01
Publisher
Published in
Volume
6
Issue
1
Article Number
015012
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
January 23, 2019