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

Stanford University

Columbia University in the City of New York

P. Nagler

Universität Regensburg

C. Schuller

Universität Regensburg

T. F. Heinz

Stanford University

Columbia University in the City of New York

T. Korn

Universität Regensburg

A. Chernikov

Columbia University in the City of New York

Universität Regensburg

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 - 101021F

Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)

Europeiska kommissionen (FP7), 2013-10-01 -- 2016-03-31.

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1117/12.2252486

Mer information

Senast uppdaterat

2018-06-25