Isotope shift exponent in two-band high-Tc superconductors with linear-energy-dependent electronic density of states

被引：12
|
作者：
Okoye, CMI [1 ]
机构：
[1] Univ Nigeria, Dept Phys & Astron, Nsukka, Nigeria
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1999年 / 313卷 / 3-4期
关键词：
isotope effect; high-T-c superconductivity; energy-dependent electronic density of states; negative-U centre interaction;
D O I：
10.1016/S0921-4534(98)00685-6
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The isotope shift exponent is derived from the two-band BCS gap equation with a Linear-energy-dependent electronic density of states and assuming that both the electron-phonon and free-carrier negative-U centre interacting mechanisms are simultaneously present. The result shows that some of the anomalous features of the isotope shift exponent observed in high-T-c superconductors could be interpreted within this present model. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：197 / 204
页数：8
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