PHASE AND AMPLITUDE MODES IN A SUPERCONDUCTOR WITH INTERLAYER PAIR TUNNELING

被引：25
|
作者：
WU, WC
GRIFFIN, A
机构：
[1] Department of Physics, University of Toronto, Toronto
来源：
PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.74.158
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Chakravarty, Sudbø, Anderson, and Strong have introduced a simple model for high Tc oxides based on the effect of Cooper pair tunneling in a bilayer (with strength TJ) with s-wave pairing (g) in the layers. We discuss the order parameter fluctuations of this model. Besides the usual Anderson-Bogoliubov phase and Littlewood-Varma amplitude modes, we find new out-of-phase phase and amplitude modes. Their energy and damping depend critically on whether TJ>g or TJ<g. Such fluctuations in the relative phase and amplitude of two coupled condensates were first discussed in a different system by Leggett in 1966. © 1994 The American Physical Society.
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收藏
页码：158 / 161
页数：4
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