不对称s波超导体/绝缘层/s波超导体结的直流Josephson电流  

The dc Josephson Current in the Unsymmetrical s-wave Superconductor/Insulator/s-wave Superconductor 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：《淮阴师范学院学报（自然科学版）》2004年第2期105-108,共4页Journal of Huaiyin Teachers College;Natural Science Edition

摘　　要：在不对称s波超导体/绝缘层/s波超导体Josephson结(s/I/s)中,考虑结界面粗糙散射情况下,运用Bogoliubov deGennes(BdG)方程和Furusaki Tsukada(FT)的电流公式计算准粒子的输运系数及s/I/s结的直流Josephson电流.研究表明,结界面的通常势垒和粗糙散射均抑制结中准粒子的Andreev反射,降低了流过s/I/s结的直流Josephson电流,直流Josephson电流I随温度T的变化关系与结两侧的对称性有关.Taking into account rough interface scattering effects, within Bogoliubov-de Gennes equations and Furusaki-Tsukada formula for the Josephson current, we calculate the dc Josephson current in the unsymmetrical s-wave superconductor/insulator/s-wave superconductor junctions. It is found that dc Josephson currents are suppressed by rough interface scattering and the Josephson effect depends on strongly the symmetry of s/I/s junction.

关 键 词：s/I/s结 直流JOSEPHSON电流 粗糙散射 

分 类 号：O513[理学—低温物理]