Phononic self-energy effects and superconductivity in CaC<mml:mrow/>6

2011/08/31 by A. Sanna, Antonio Sanna, Stefano Pittalis +8
Materials Science · Physics and Astronomy · #Boron and Carbon Nanomaterials Research #Graphene research and applications #Superconductivity in MgB2 and Alloys #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.85.184514

arxiv created 2012/04/19 · openalex publication_date 2012/05/14 · arxiv updated 2012/05/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

We study the graphite intercalated compound CaC₆ by means of Eliashberg theory. We perform an analysis of the electron-phonon coupling and define a minimal six-band anisotropic structure, which leads to a Fermi-surface dependence of the superconducting gap. A comparison of the superconducting gap structure obtained using the Eliashberg and the superconducting density functional theory is performed. We further report the anisotropic properties of the electronic spectral function, the polaronic quasiparticle branches, and their interplay with Bogoljubov excitations.

Citations

• Properties of boson-exchange superconductors
• Effect of an electron-phonon interaction on the one-electron spectral weight of ad-wave superconductor
• Intercalation compounds of graphite
• Calculation of the Superconducting State Parameters with Retarded Electron-Phonon Interaction
• Soft self-consistent pseudopotentials in a generalized eigenvalue formalism
• QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials