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北美退伍军人节(Veterans Day),12 日无更新
arXiv 0911.0846cond-mat.supr-con
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SIFS约瑟夫森结中的耗散电流

Dissipative current in SIFS Josephson junctions

A. S. Vasenko, S. Kawabata, A. A. Golubov, M. Yu. Kupriyanov, F. W. J. Hekking

摘要:

利用准经典理论研究了脏极限下的超导体/绝缘体/铁磁体/超导体(SIFS)隧道约瑟夫森结.我们考虑的情况下,一个强大的隧道势垒,使左S层和右FS双层去耦。我们定量计算态密度(DOS)的FS双层任意长度的铁磁层,使用自洽的数值方法。我们比较这些结果与一个已知的解析DOS近似,这是有效的铁磁层是足够长的。最后定量计算了SIFS结的电流-电压特性。

英文摘要:

We investigate superconductor/insulator/ferromagnet/superconductor (SIFS) tunnel Josephson junctions in the dirty limit, using the quasiclassical theory. We consider the case of a strong tunnel barrier such that the left S layer and the right FS bilayer are decoupled. We calculate quantitatively the density of states (DOS) in the FS bilayer for arbitrary length of the ferromagnetic layer, using a self-consistent numerical method. We compare these results with a known analytical DOS approximation, which is valid when the ferromagnetic layer is long enough. Finally we calculate quantitatively the current-voltage characteristics of a SIFS junction.

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