ISOTOPE EFFECT IN D-WAVE SUPERCONDUCTORS

被引：30
|
作者：
SCHUTTLER, HB
PAO, CH
机构：
[1] Center for Simulational Physics, Department of Physics and Astronomy, University of Georgia, Athens
来源：
PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 24期
关键词：
D O I：
10.1103/PhysRevLett.75.4504
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Based on recently proposed antiferromagnetic spin fluctuation exchange models for d(x2-y2) superconductors, we show that coupling to harmonic phonons cannot account for the observed isotope effect in the cuprate high-T-c materials, whereas coupling to strong anharmonic multiple-well lattice tunneling modes can. Our results thus point towards a strongly enhanced effective electron-phonon coupling and a possible breakdown of Migdal-Eliashberg theory in the cuprates.
引用
收藏
页码：4504 / 4507
页数：4
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