Phononic self-energy effects and superconductivity in CaC6

摘要: We study the graphite intercalated compound CaC${}_{6}$ by means of Eliashberg theory. perform an analysis electron-phonon coupling and define a minimal six-band anisotropic structure, which leads to Fermi-surface dependence superconducting gap. A comparison gap structure obtained using density functional theory is performed. further report properties electronic spectral function, polaronic quasiparticle branches, their interplay with Bogoljubov excitations.