title: Multiband superconductivity in Pb, H under pressure and CaBeSi from ab initio calculations.
abstract: Superconductivity in Pb, H under extreme pressure and CaBeSi, in the framework of the density functional theory for superconductors, is discussed. A detailed analysis on how the electron-phonon and electron-electron interactions combine together to determine the superconducting gap and critical temperature of these systems is presented. Pb, H under pressure and CaBeSi are multigap superconductors. We will address the question under which conditions does a system exhibits this phenomenon. The presented results contribute to the understanding of multiband and anisotropic superconductivity, which has received a lot of attention since the discovery of MgB(2), and show how it is possible to describe the superconducting properties of real materials on a fully ab initio basis.
authors.affiliation: Institut für Theoretische Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany. European Theoretical Spectroscopy Facility-ETSF, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Bersier
authors.forename: A
authors.initials: A
authors.lastname: Floris
authors.forename: P
authors.initials: P
authors.lastname: Cudazzo
authors.forename: G
authors.initials: G
authors.lastname: Profeta
authors.forename: A
authors.initials: A
authors.lastname: Sanna
authors.forename: F
authors.initials: F
authors.lastname: Bernardini
authors.forename: M
authors.initials: M
authors.lastname: Monni
authors.forename: S
authors.initials: S
authors.lastname: Pittalis
authors.forename: S
authors.initials: S
authors.lastname: Sharma
authors.forename: H
authors.initials: H
authors.lastname: Glawe
authors.forename: A
authors.initials: A
authors.lastname: Continenza
authors.forename: S
authors.initials: S
authors.lastname: Massidda
authors.forename: E K U
authors.initials: EK
authors.lastname: Gross