铁磁超导态/绝缘层/自旋三重态p波超导体结的直流Josephson电流  

The dc Josephson current in superconductor-ferromagnet/insulator/spin-triplet p-wave superconductor junctions

作　　者：李晓薇[1] 

机构地区：[1]淮阴师范学院物理系,淮安223001

出　　处：《物理学报》2006年第12期6637-6642,共6页Acta Physica Sinica

基　　金：江苏省教育厅自然科学基金(批准号:06KJB140009)资助的课题.~~

摘　　要：由Bogoliubov-deGennes方程得到铁磁超导共存态(FS)的自洽方程,利用推广的Furusaki-Tsukada的电流公式计算了铁磁超导态/绝缘层/自旋三重态p波超导体(FS/I/p)结的直流Josephson电流随结的温度、相位差以及FS中磁交换能、结界面的势垒散射强度的变化关系.研究表明:FS中磁交换能、结界面的势垒散射均抑制FS/I/p结的直流Josephson电流.当自旋三重态超导体具有px波配对势时,自旋三重态超导体结的直流Josephson电流随结两侧相位差的振荡周期是π.From the Bogoliubov-de Gennes equations, we obtain the self-consistent equation for a ferromagnetic superconductor. Using the Furusaki-Tsukada formula, we calculate the dc Josephson current in superconductor-ferromagnet/insulator/spin-triplet p-wave superconductor （FS/I/p） junctions. It is found that the dc Josephson currents in FS/I/p are suppressed by the presence of exchange field and insulating barrier scattering. The period of oscillation curves of the Josephson current is π when there exist ps-wavesymmetries for the pairing symmetries of spin-triplet superconductor.

关 键 词：铁磁超导态 自旋三重态超导体 P波超导体 直流JOSEPHSON电流 

分 类 号：O482.5[理学—固体物理]