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- W4387253002 abstract "Coupling of excitations, arising from electronic correlation or electron-phonon interaction, leads to intriguing effects on the spectra of materials. Current approximations to calculate photoluminescence spectra most often describe this coupling insufficiently. Starting from basic equations of many-body perturbation theory, we derive a cumulant formulation for photoluminescence spectra that contains excitonic effects and the coupling between excitons and other degrees of freedom such as plasmons and phonons. The cumulant approach allows us to include dynamical effects arising from the electronic correlation and electron-phonon coupling in a simple and intuitive way. It can be implemented as a postprocessing of state-of-the-art out-of-equilibrium Bethe-Salpeter calculations of excitonic states." @default.
- W4387253002 created "2023-10-03" @default.
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- W4387253002 date "2023-10-02" @default.
- W4387253002 modified "2023-10-03" @default.
- W4387253002 title "Dynamical effects on photoluminescence spectra from first principles: A many-body Green's function approach" @default.
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- W4387253002 doi "https://doi.org/10.1103/physrevb.108.165101" @default.
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