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Proceedings Paper

Excitonic linewidth and coherence lifetime in monolayer transition metal dichalcogenides
Author(s): Malte Selig; Gunnar Berghäuser; Archana Raja; Philipp Nagler; Christian Schüller; Tony F. Heinz; Tobias Korn; Alexey Chernikov; Ermin Malic; Andreas Knorr
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Paper Abstract

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.

Paper Details

Date Published: 23 February 2017
PDF: 9 pages
Proc. SPIE 10102, Ultrafast Phenomena and Nanophotonics XXI, 101021F (23 February 2017); doi: 10.1117/12.2252486
Show Author Affiliations
Malte Selig, Technische Univ. Berlin (Germany)
Gunnar Berghäuser, Technische Univ. Berlin (Germany)
Archana Raja, Columbia Univ. (United States)
Stanford Univ. (United States)
Philipp Nagler, Univ. Regensburg (Germany)
Christian Schüller, Univ. Regensburg (Germany)
Tony F. Heinz, Stanford Univ. (United States)
SLAC National Accelerator Lab. (United States)
Columbia Univ. (United States)
Tobias Korn, Univ. Regensburg (Germany)
Alexey Chernikov, Univ. Regensburg (Germany)
Columbia Univ. (United States)
Ermin Malic, Chalmers Univ. of Technology (Sweden)
Andreas Knorr, Technische Univ. Berlin (Germany)

Published in SPIE Proceedings Vol. 10102:
Ultrafast Phenomena and Nanophotonics XXI
Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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