Excitonic linewidth and coherence lifetime in monolayer transition metal dichalcogenides
Paper i 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.
Författare
M. Selig
Humboldt-Universität zu Berlin
Gunnar Berghäuser
Humboldt-Universität zu Berlin
A. Raja
Columbia University
Stanford University
P. Nagler
Universität Regensburg
C. Schuller
Universität Regensburg
T. F. Heinz
Stanford University
Columbia University
T. Korn
Universität Regensburg
A. Chernikov
Universität Regensburg
Columbia University
Ermin Malic
Chalmers, Fysik, Kondenserade materiens teori
A. Knorr
Humboldt-Universität zu 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)
Europeiska kommissionen (EU) (EC/FP7/604391), 2013-10-01 -- 2016-03-31.
Ämneskategorier
Den kondenserade materiens fysik
DOI
10.1117/12.2252486