Impurity effects on the flux phase quantum-critical-point scenario

被引：5

作者：

Cappelluti, E ^{[1
]}

Zeyher, R ^{[1
]}

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

EUROPHYSICS LETTERS | 2000年 / 49卷 / 04期

关键词：

D O I：

10.1209/epl/i2000-00175-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Impurity substitution of Zn in La-214 and (Y, Ca)-123 high-T-c superconductors suppresses T-c but does not affect appreciably the onset of the pseudogap phase in the underdoped region nor optimal doping or the position of the inferred quantum critical point. Based on a 1/N expansion of the t-J model we explain these findings as well as the similar dependence on a magnetic field in terms of a quantum-critical-point scenario where a flux phase causes the pseudogap.

引用

页码：487 / 493

页数：7