Theory for underdoped high-Tc superconductors:: effects of phase fluctuations

被引:7
|
作者
Schäfer, F [1 ]
Timm, C [1 ]
Manske, D [1 ]
Bennemann, KH [1 ]
机构
[1] Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany
关键词
D O I
10.1023/A:1022572322775
中图分类号
O59 [应用物理学];
学科分类号
摘要
In underdoped cuprates, T-c is thought to be determined by Cooper pair phase fluctuations because of the small superfluid density n(s). Experimentally, T-c is found to scale with n(s). The fluctuation-exchange approximation (FLEX) in its standard form fails to predict this behavior of T-c since it does not include phase fluctuations. We therefore extend the FLEX to include them selfconsistently. We present results for T-c[n(s),x], where x is the doping.
引用
收藏
页码:223 / 227
页数:5
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