TR-ARPES investigation of excitonic properties in the group VII TMD ReSe<sub>2</sub>
ORAL
Abstract
The rhenium dichalcogenides ReS2 and ReSe2 are van der Waals semiconductors with bandgaps in the visible or near-infrared that exhibit strong optical and conductance anisotropy due to their low-symmetry triclinic crystal structure. Together with their notable stability under ambient conditions, this rare combination of properties make them ideal candidates for polarization-sensitive optoelectronic applications.
Strong Coulomb interactions in these materials result in the spectra of low-lying electronic excitations in these materials being dominated by excitonic resonances. Although these transitions have been well studied through optical absorption and photoluminescence spectroscopy, certain key properties such as the location and extent of delocalization of the exciton in momentum-space remain challenging to access without momentum-resolved spectroscopy.
Here, we report a direct time, momentum, and energy resolved measurement of excitonic properties in ReSe2 using time- and angle-resolved photoemission spectroscopy (TR-ARPES).
Strong Coulomb interactions in these materials result in the spectra of low-lying electronic excitations in these materials being dominated by excitonic resonances. Although these transitions have been well studied through optical absorption and photoluminescence spectroscopy, certain key properties such as the location and extent of delocalization of the exciton in momentum-space remain challenging to access without momentum-resolved spectroscopy.
Here, we report a direct time, momentum, and energy resolved measurement of excitonic properties in ReSe2 using time- and angle-resolved photoemission spectroscopy (TR-ARPES).
–
Presenters
-
Bradley G Guislain
University of British Columbia
Authors
-
Bradley G Guislain
University of British Columbia
-
Rysa Greenwood
University of British Columbia, The University of British Columbia
-
Matteo Michiardi
University of British Columbia
-
Sergey Zhdanovich
University of British Columbia
-
MengXing Na
University of British Columbia
-
Sydney K Dufresne
University of British Columbia
-
Arthur K Mills
University of British Columbia, The University of British Columbia
-
Jerry I Dadap
University of British Columbia, The University of British Columbia
-
Andrea Damascelli
University of British Columbia
-
Ziliang Ye
University of British Columbia
-
David Jones
University of British Columbia, The University of British Columbia