势垒散射对双层d波超导结直流Josephson电流的影响
Barrier interface scattering effect on DC Josephson current in d-wave superconductor/d-wave superconductor junctions
金霞 1廖艳华2
作者信息
- 1. 苏州大学物理科学与技术学院,江苏苏州,215006
- 2. 湖北理工学院理学院,湖北黄石,435003
- 折叠
摘要
在d波超导体/绝缘层/d波超导体(dS/I/dS)中,考虑到结界面势垒散射,运用Bogoliubov-de Gennes(BdG)方程和推广的Furusaki-Tsukada(FT)电流公式,计算了超导结中准粒子的传输系数和直流Josephson电流.研究结果表明:dS/I/dS结中的Josephson电流随着温度的变化曲线强烈依赖于d波超导体的晶轴方位,并且结界面处的势垒散射始终对Andreev反射有抑制作用.
Abstract
The d. c. Josephson effect has been studied by taking into account the barrier interface scattering effect in a d-wave superconductor/insulator/d-wave superconductor junctions. We calcu-late the d. c. Josephson current based on the Bogoliubov de Gennes(BdG) equation and Furusaki-Tsukada( FT) formula. It is found that the d. c. Josephson current depends strongly on the crystalline axis orientation of d-wave superconductor in d-wave superconductor /insulator/d-wave superconductor junctions, the barrier strength at interface always suppress the Andreev reflection.
关键词
dS/I/dS结/d波超导体/Josephson电流Key words
d-wave superconductor/insulator/d-wave superconductor junctions/d-wave supercon-ductor/Josephson current引用本文复制引用
出版年
2012
NETL
NSTL
维普
万方数据