塞曼效应对d波超导隧道结中约瑟夫森电流的影响  

Influence of Zeeman Effect on Josephson Current Through d Wave Superconductor Tunnel Junctions

作　　者：廖艳华 柯睿灵 乐启华 王辛 Liao Yanhua;Ke Ruiling;Yue Qihua;Wang Xin(School of Mathematics and Physics,Hubei Polytechnic University,Huangshi Hubei 435003)

机构地区：[1]湖北理工学院数理学院,湖北黄石435003

出　　处：《湖北理工学院学报》2018年第6期27-31,共5页Journal of Hubei Polytechnic University

基　　金：湖北理工学院创新人才项目(项目编号:16xjz01c);湖北省教育厅科学研究项目(项目编号:B2017261)

摘　　要：利用Dirac-Bogoliubov-De-Gennes方程,从理论角度研究了不同磁场性质对d波超导体隧道结直流约瑟夫森电流的影响。研究表明:温度与势垒散射对电流始终有抑制作用,超导体的晶轴相位角对结中的电流输运有较大影响。一定条件下,磁场能增强约瑟夫森电流,且能使电流方向发生改变,呈现0-态的开关效应。With Dirac-Bogoliubov-De-Gennes equation,the effect of different magnetic fields on Josephson current for d wave superconductor tunnel junction have been studied theoretically. The results show that temperature and barrier scattering always suppress the current. In addition,the crystal orientation of d wave superconductor also exerts a great influence on the current transport. Under certain conditions,magnetic field can strengthen Josephson current and alter the current direction,inducing 0-state switch effects.

关 键 词：高温超导体 约瑟夫森电流 隧道结 

分 类 号：O511.2[理学—低温物理]