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25 April 2024

» arxiv » 1510.6288

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Fast relaxation of photo-excited carriers in 2D transition metal dichalcogenides
Mark Danovich ; Igor Aleiner ; Neil D. Drummond ; Vladimir Fal'ko ;
Date:	21 Oct 2015
Abstract:	We predict a fast relaxation of photo-excited carriers in monolayer transition metal dichalcogenides (TMDCs), which is mediated by the emission of longitudinal optical (LO) phonons. By evaluating Born effective charges for ${ m MoS_2, MoSe_2,WS_2}$, and ${ m WSe_2}$, we find that, due to the polar coupling of electrons with LO phonons, the relaxation times for hot electrons and holes are of the order of a few ps.
Source:	arXiv, 1510.6288
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