TRANSITION-TEMPERATURE AND ISOTOPE EFFECT NEAR AN EXTENDED VAN HOVE SINGULARITY

被引：6
|
作者：
ZEYHER, R
机构：
[1] Max-Planck-Institut für Festkörperforschung, Stuttgart
来源：
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1995年 / 97卷 / 01期
关键词：
D O I：
10.1007/BF01317581
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Using Eliashberg theory and a model density for alpha(2)F the transition temperature T-c and the isotope effect a are calculated near an extended van Hove singularity. We show that, at least in the one-particle and the Migdal approximation, even the considered strong van Hove singularity cannot yield large enhancements of T-c and strong reductions of alpha of the kind observed in experiment around optimal doping.
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页码：3 / 5
页数：3
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