Solutions of Eliashberg equations for an electron-phonon coupling with a cutoff

B. Barbiellini*, M. Weger, M. Peter

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)2397-2398
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Volume235-240
Issue numberPART 4
DOIs
StatePublished - Dec 1994

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