“…The latter can affect the electron relaxation dynamics for picoseconds after the laser pulse has ended. Girotto, Caruso, and Novko also go beyond the picture of thermalized hot electrons in their study of ultrafast light-driven phonon dynamics in MoS 2 monolayers. By coupling time-dependent electron and phonon populations from ab initio time-dependent Boltzmann equation simulations with many-body phonon self-energy calculations, they study the ultrafast changes in frequencies and lifetimes of individual phonon modes.…”