Multiband superconductivity in Pb, H under pressure and CaBeSi from {\it 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 {\it ab-initio} basis.

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Cited by in corpus (3)

• Superconductivity in the elements, alloys and simple compounds
• Superconducting pairing mediated by spin-fluctuations from first principles
• Understanding the onset of negative electronic compressibility in one- and two-band 2D electron gases: Application to LaAlO${}_3$/SrTiO${}_3$