2022/02/06 by Francesco Macheda, Paolo Barone, Macheda, Francesco +3 · 1 citation
Physics and Astronomy · Materials Science · #Surface and Thin Film Phenomena #Semiconductor materials and interfaces #Thermal properties of materials
paper · pdf · doi:10.48550/arxiv.2202.02835
We study the effect of doping on the electron-phonon interaction and on the phonon frequencies in doped semiconductors, taking into account the screening in presence of free carriers at finite temperature. We study the impact of screening on the Fröhlich-like vertex and on the long-range components of the dynamical matrix, going beyond the state-of-the-art description for undoped crystals, thanks to the development of a computational method based on maximally localized Wannier functions. We apply our approach to cubic silicon carbide, where in presence of doping the Fröhlich coupling and the longitudinal-transverse phonon splitting are strongly reduced, thereby influencing observable properties such as the electronic lifetime.