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 - 101021F

Graphene-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

More information

Latest update

6/25/2018