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Excitonic effects on infrared vibrational and Raman spectroscopy from first principles
Yang-Hao Chan, Zhenglu Li, Steven G. Louie
We develop a first-principles approach to compute infrared (IR) vibrational absorption and Raman scattering spectra with excitonic effects included. Our method is based on a pertur…
Diverse Manifestations of Electron-Phonon Coupling in a Kagome Superconductor
Jing-Yang You, Chih-En Hsu, Mauro Del Ben +1
Recent angle-resolved photoemission spectroscopy (ARPES) experiments on a kagome metal CsVSb revealed distinct multimodal dispersion kinks and nodeless superconducting gaps…
Phonon screening of excitons in atomically thin semiconductors
Woncheol Lee, Antonios M. Alvertis, Zhenglu Li +4
Atomically thin semiconductors, encompassing both 2D materials and quantum wells, exhibit a pronounced enhancement of excitonic effects due to geometric confinement. Consequently,…