Anisotropic Migdal-Eliashberg theory using Wannier functions
Anisotropic Migdal-Eliashberg theory using Wannier functions
We combine the fully anisotropic Migdal-Eliashberg theory with electron-phonon interpolation based on maximally localized Wannier functions, in order to perform reliable and highly accurate calculations of the anisotropic temperature-dependent superconducting gap and critical temperature of conventional superconductors. Compared with the widely used McMillan approximation, our methodology yields a more comprehensive …