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Electron–Hole Plasma‐Induced Dephasing in Transition Metal Dichalcogenides
Author(s) -
Neuhaus Josefine,
Stroucken Tineke,
Koch Stephan W.
Publication year - 2021
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.202100391
Subject(s) - dephasing , degenerate energy levels , condensed matter physics , monolayer , excitation , electron , plasma , spectral line , density functional theory , transition metal , absorption (acoustics) , molecular physics , absorption spectroscopy , atomic physics , materials science , chemistry , physics , quantum mechanics , optics , nanotechnology , catalysis , biochemistry
Electron–hole plasma‐induced dephasing and its influence on the excitonic absorption and the degenerate four‐wave mixing spectra in monolayer transition metal dichalcogenides are investigated. A systematic microscopic theory is presented that combines density functional calculations for the linear material properties with a many‐body equation of motion approach for the optical response. Numerical results are obtained for the example of an hBN‐encapsulated layer ofMoS 2 . It is shown that the influence of the excitation‐induced dephasing depends only weakly on the exact shape of the carrier distribution for small densities, whereas distribution details become more important with increasing density.