Excitonic linewidth and coherence lifetime in monolayer transition metal dichalcogenides
Paper in proceeding, 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-Universitat zu Berlin
G. Berghäuser
Humboldt-Universitat zu Berlin
A. Raja
Stanford University
Columbia University in the City of New York
P. Nagler
Universita(t Regensburg
C. Schuller
Universita(t Regensburg
T. F. Heinz
Columbia University in the City of New York
Stanford Linear Accelerator Center
Stanford University
T. Korn
Universita(t Regensburg
A. Chernikov
Universita(t Regensburg
Columbia University in the City of New York
Chalmers University of Technology
Ermin Malic
Chalmers, Physics, Condensed Matter Theory
A. Knorr
Humboldt-Universitat zu Berlin
Proceedings of SPIE - The International Society for Optical Engineering
0277786X (ISSN) 1996756X (eISSN)
Vol. 10102 Article no UNSP 101021F - 101021F9781510606456 (ISBN)
Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)
European Commission (FP7) (EC/FP7/604391), 2013-10-01 -- 2016-03-31.
Subject Categories (SSIF 2011)
Condensed Matter Physics
DOI
10.1117/12.2252486
ISBN
9781510606456