Quasiparticles and phonon satellites in spectral functions of semiconductors and insulators: Cumulants applied to full first principles theory and Fröhlich polaron

Jean Paul Nery, Philip B. Allen, Gabriel Antonius +3

The electron-phonon interaction causes thermal and zero-point motion shifts of electron quasiparticle (QP) energies ${\epsilon }_k(T)$. Other consequences of interactions, visible in angle-r…