超导体/铁磁体绝缘层-超导体隧道结的直流Josephson效应

Josephson effect in superconductor/ ferromagnet-insulator-superconductor junctions

在超导体 铁磁体 绝缘层 超导体结 (S F I S)中 ,运用Bogoliubov deGennes(BdG)方程和Furusaki Tsukada(FT)电流公式 ,计算铁磁超导共存态的自洽方程和S F I S结中的直流Josephson电流 .研究表明 ,铁磁超导态的磁交换能h对准粒子的Andreev反射有抑制作用 ,使得S F I

We calculate the dc Josephson current in superconductor/Ferromagnet-insulator-superconductor junctions (S/F-I-S) and the self-consistent equation in ferromagnetic superconductor, within Bogoliubov-de Gennes equation and Furusaki-Tsukada formula. It is shown that the ferromagnetic exchange interaction suppresses the Andreev reflection, and consequently the Josephson current in S/F-I-S strongly depends on the ferromagnetic exchange interaction.