TY - JOUR
T1 - Phononic self-energy effects and superconductivity in CaC 6
AU - Sanna, A.
AU - Pittalis, S.
AU - Dewhurst, J. K.
AU - Monni, M.
AU - Sharma, S.
AU - Ummarino, G.
AU - Massidda, S.
AU - Gross, E. K.U.
PY - 2012/5/14
Y1 - 2012/5/14
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84861664984&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.85.184514
DO - 10.1103/PhysRevB.85.184514
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AN - SCOPUS:84861664984
SN - 1098-0121
VL - 85
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 18
M1 - 184514
ER -