Pseudogap phenomena in high-Tc cuprates as a precursor of the strong coupling superconductivity

被引：0
作者：
Yanase, Y [1 ]
Yamada, K [1 ]
机构：
[1] Kyoto Univ, Grad Sch Sci, Kyoto 6068502, Japan
来源：
PHYSICA B | 2000年 / 284卷
关键词：
pseudogap; strongly correlated systems; superconducting fluctuations;
D O I：
10.1016/S0921-4526(99)02331-5
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We point out that the pseudogap phenomena observed in under-doped High-T-c cuprates are naturally understood as a precursor of the strong coupling superconductivity. A strong coupling superconductivity necessarily leads to strong fluctuations. In particular, the superconducting fluctuations, which are strongly diffusive within the conventional weak coupling theory, become propagative and have a character of the pre-formed pairs in the strong coupling case. Such strong fluctuations lead to the gap structure of both the spectral weight and the density of states. The superconducting critical temperature is strongly reduced by the fluctuations in the strong coupling case. (C) 2000 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码：665 / 666
页数：2
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