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.

Phononic self-energy effects and superconductivity in CaC6 / Sanna, A.; Pittalis, S.; Dewhurst, J. K.; Monni, M.; Sharma, S.; Ummarino, Giovanni; Massida, S.; Gross, E. K. U.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 85:(2012), pp. 184514-1-184514-8. [10.1103/PhysRevB.85.184514]

Phononic self-energy effects and superconductivity in CaC6

UMMARINO, Giovanni;
2012

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2497194
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