The Isotope Effect in d-Wave Superconductors
Condensed Matter
2009-10-28 v1
Abstract
Based on recently proposed anti-ferromagnetic spin fluctuation exchange models for -superconductors, we show that coupling to harmonic phonons {\it{cannot}} account for the observed isotope effect in the cuprate high- materials, whereas coupling to strongly anharmonic multiple-well lattice tunneling modes {\it{can}}. Our results thus point towards a strongly enhanced {\it{effective}} electron-phonon coupling and a possible break-down of Migdal-Eliashberg theory in the cuprates.
Cite
@article{arxiv.cond-mat/9511086,
title = {The Isotope Effect in d-Wave Superconductors},
author = {H. -B. Schüttler and C. -H. Pao},
journal= {arXiv preprint arXiv:cond-mat/9511086},
year = {2009}
}
Comments
12 pages + 2 figures, Postscript files, all uuencoded Phys. Rev. Lett. (1995, to be published)