铁磁-超导隧道结中粗糙界面散射对直流Josephson电流的影响  

ROUGH INTERFACE SCATTERING EFFECT ON DC JOSEPHSON CURRENT IN FERROMAGNET-SUPERCONDUCTOR TUNNEL JUNCTIONS

作　　者：李晓薇[1] 

机构地区：[1]淮阴师范学院物理系,江苏淮安223001

出　　处：《低温物理学报》2003年第4期251-256,共6页Low Temperature Physical Letters

摘　　要：通过求解Bogoliubov deGennes(BdG)方程得到铁磁超导共存态 (FS)的自洽方程 ,在考虑结界面的粗糙情形下 ,由推广的Furusaki Tsukada(FT)的电流公式计算了铁磁超导态 /绝缘层/s波超导体 (FS/I/S)结的直流Josephson电流 ,讨论了FS/I/S结的直流Josephson临界电流随磁交换能、温度的变化情况 .研究表明Using Bogoliubov de Gennes equations, we obtain the self consistent equation in a ferromagnetic superconductor. Taking into account the rough interface scattering effects, within Bogoliubov de Gennes equations and Furusaki Tsukada formula we calculate the dc Josephson current in the ferromagnet superconductor tunnel junctions. It is found that dc Josephson currents in FS/I/S are suppressed by the ferromagnetic exchange interaction and rough interface scattering.

关 键 词：铁磁-超导隧道结 粗糙界面散射 铁磁超导共存态 自洽方程 直流JOSEPHSON电流 FS/I/S结 

分 类 号：O511[理学—低温物理] O482.523[理学—物理]