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

作　　者：金霞[1] 廖艳华[2] 

机构地区：[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

出　　处：《苏州大学学报（自然科学版）》2012年第4期58-62,共5页Journal of Soochow University(Natural Science Edition)

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.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 calculate 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 

分 类 号：O469[理学—凝聚态物理]