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- W2984182010 abstract "A valley-selective circular dichroism and a pronounced spin-valley locking in monolayer transition metal dichalcogenides (TMDCs) enable the investigation of new many-body physics revealed in the ultrafast nonlinear optical response of these atomically thin materials. While this topic is experimentally well studied in pump-probe spectroscopy, only a fragmented theoretical understanding is available due to the complexity and multitude of occurring effects. Here, a microscopic approach is presented to describe the ultrafast pump-probe response of monolayer TMDCs in the coherent limit. We focus on close to band edge excitations dominated by strongly correlated, bound electron-hole pairs, namely excitonic excitations. The approach includes Hartree–Fock and correlation effects up to two excitonic excitations known from conventional semiconductors as well as TMDC typical Coulomb mechanisms such as intra- and intervalley excitation and charge transfer. The investigated coherent limit is able to explain different signatures observed in ultrafast pump-probe spectroscopy for temporal pump-probe overlap within one consistent formalism dominated by excitons, biexcitons, and exciton-exciton scattering states." @default.
- W2984182010 created "2019-11-22" @default.
- W2984182010 creator A5008274815 @default.
- W2984182010 creator A5025304532 @default.
- W2984182010 creator A5076852747 @default.
- W2984182010 date "2019-12-04" @default.
- W2984182010 modified "2023-10-16" @default.
- W2984182010 title "Theory of coherent pump–probe spectroscopy in monolayer transition metal dichalcogenides" @default.
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