Josephson current in S-FIF-S junctions: Nonmonotonic dependence on misorientation angle
Josephson current in S-FIF-S junctions: Nonmonotonic dependence on misorientation angle
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DOI：
10.1103/physrevb.66.140503
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发表时间：
2002-08
影响因子：
3.7
通讯作者：
Yu.S. Barash;I. Bobkova;T. Kopp
中科院分区：
文献类型：
--
作者：
Yu.S. Barash;I. Bobkova;T. Kopp
研究了超导体-铁磁体-绝缘体-铁磁体-超导体（S-FIF-S）结中Andreev界面态的光谱和自旋结构，重点讨论了三层界面中铁磁层的有限透明性和面内磁化方向间的取向差角φ.结果表明，在S-FIF-S量子点接触中，约瑟夫森电流可以表现出非单调依赖于取向差角。在平行磁化的特殊情况下，如果π态是结的平衡态，则会发生特征行为。
Spectra and spin structures of Andreev interface states in superconductor-ferromagnet-insulator-ferromagnet-superconductor (S-FIF-S) junctions are investigated with emphasis on finite transparency and misorientation angleφ between in-plane magnetizations of ferromagnetic layers in a three-layer interface. It is demonstrated that the Josephson current in S-FIF-S quantum point contacts can exhibit a nonmonotonic dependence on the misorientation angle. The characteristic behavior takes place if the π state is the equilibrium state of the junction in the particular case of parallel magnetizations.