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First-principles study of excitons in the optical spectra of silver chloride

Abstract : Silver chloride is a material that has been investigated and used for many decades. Of particular interest are its optical properties, but only few fundamental theoretical studies exist. We present first-principles results for the optical properties of AgCl, obtained using time-dependent density functional theory and many-body perturbation theory. We show that optical properties exhibit strong excitonic effects, which are correctly captured only by solving the Bethe-Salpeter equation starting from quasiparticle self-consistent GW results. Numerical simulations are made feasible by using a model screening for the electron-hole interaction in a way that avoids the calculation of the static dielectric constant. A thorough analysis permits us to discuss localization in bright and dark excitons of silver chloride.
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Preprints, Working Papers, ...
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https://hal.archives-ouvertes.fr/hal-03215065
Contributor : Agnès Magron <>
Submitted on : Friday, May 7, 2021 - 10:34:56 AM
Last modification on : Tuesday, July 13, 2021 - 4:54:05 PM

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2009.08699.pdf
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  • HAL Id : hal-03215065, version 2
  • ARXIV : 2009.08699

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Arnaud Lorin, Matteo Gatti, Lucia Reining, Francesco Sottile. First-principles study of excitons in the optical spectra of silver chloride. 2021. ⟨hal-03215065v2⟩

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