Phononic self-energy effects and superconductivity in CaC 6

A. Sanna*, S. Pittalis, J. K. Dewhurst, M. Monni, S. Sharma, G. Ummarino, S. Massidda, E. K.U. Gross

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

We study the graphite intercalated compound CaC 6 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.

Original languageAmerican English
Article number184514
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number18
DOIs
StatePublished - 14 May 2012
Externally publishedYes

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