Excitonic linewidth and coherence lifetime in monolayer transition metal dichalcogenides
Paper in proceedings, 2017
Monolayers of transition metal dichalcogenides are direct gap semiconductors, which have attracted much attention in the recent past. Due to a strong Coulomb interaction, they possess strongly bound electron-hole pairs, with binding energies of hundreds of meV which is an order of magnitude larger than in conventional materials. Here, we investigate the microscopic origin of the homogeneous linewidth and coherence lifetime of excitonic resonances in monolayer molybdenum disulfide, taking exciton phonon scattering and radiative recombination into account. We find a superlinear increasing homogeneous linewidth from 2 meV at 5K to 14 meV at room temperature corresponding to a coherence lifetime of 160 fs and 25 fs.
Author
M. Selig
Humboldt University of Berlin
Gunnar Berghäuser
Humboldt University of Berlin
A. Raja
Stanford University
Columbia University in the City of New York
P. Nagler
University of Regensburg
C. Schuller
University of Regensburg
T. F. Heinz
Stanford University
Columbia University in the City of New York
T. Korn
University of Regensburg
A. Chernikov
Columbia University in the City of New York
University of Regensburg
Ermin Malic
Chalmers, Physics, Condensed Matter Theory
A. Knorr
Humboldt University of Berlin
Proceedings of SPIE - The International Society for Optical Engineering
0277786X (ISSN) 1996756X (eISSN)
Vol. 10102 Article no UNSP 101021F - 101021FGraphene-Based Revolutions in ICT And Beyond (Graphene Flagship)
European Commission (FP7), 2013-10-01 -- 2016-03-31.
Subject Categories
Condensed Matter Physics
DOI
10.1117/12.2252486