TY - JOUR
T1 - Solutions of Eliashberg equations for an electron-phonon coupling with a cutoff
AU - Barbiellini, B.
AU - Weger, M.
AU - Peter, M.
PY - 1994/12
Y1 - 1994/12
N2 - We discuss the Eliashberg Equations for the case of an electron-phonon coupling with an energy cutoff. This cutoff is imposed either for the energy difference by means of a strip function, or for both energies, with a Cooper-like expression. The strip function cutoff requires explicit calculation of not only the frequency renormalization function Z but also the energy renormalization X. The physical origin of such cutoffs might lie in the very strong electron-electron interaction which seems typical for high Tc superconductivity. If such cutoffs are admitted, the hypothesis that Tc is caused at least in part by a strong electron-phonon interaction can be reconsidered.
AB - We discuss the Eliashberg Equations for the case of an electron-phonon coupling with an energy cutoff. This cutoff is imposed either for the energy difference by means of a strip function, or for both energies, with a Cooper-like expression. The strip function cutoff requires explicit calculation of not only the frequency renormalization function Z but also the energy renormalization X. The physical origin of such cutoffs might lie in the very strong electron-electron interaction which seems typical for high Tc superconductivity. If such cutoffs are admitted, the hypothesis that Tc is caused at least in part by a strong electron-phonon interaction can be reconsidered.
UR - http://www.scopus.com/inward/record.url?scp=43949159961&partnerID=8YFLogxK
U2 - 10.1016/0921-4534(94)92419-8
DO - 10.1016/0921-4534(94)92419-8
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AN - SCOPUS:43949159961
SN - 0921-4534
VL - 235-240
SP - 2397
EP - 2398
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - PART 4
ER -