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.

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页码：4504 / 4507

页数：4

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