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北美退伍军人节(Veterans Day),12 日无更新
arXiv 0901.1895cond-mat.supr-con
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0-作为$s_{\pm}$波配对态信号的约瑟夫森结中的$π$相移

0-$π$ phase shifts in Josephson junctions as a signature for the $s_{\pm}$-wave pairing state

Jacob Linder, Iver B. Sperstad, Asle Sudbø

摘要:

本文研究了在扩散极限和弹道极限下超导铁磷化合物的约瑟夫森结。我们专注于建议的$s_\pm$波状态,并发现相对相移固有的$s_\pm$波状态可以提供0- $π$振荡的约瑟夫森电流。这个特征可以用来区分这种配对状态从传统的s波对称性。0- $π$振荡表现为每个频带的界面电阻的比率的函数,并且更重要的是,表现为温度的函数,这极大地有助于它们的检测。

英文摘要:

We investigate Josephson junctions with superconducting ferropnictides, both in the diffusive and ballistic limit. We focus on the proposed $s_\pm$-wave state, and find that the relative phase shift intrinsic to the $s_\pm$-wave state may provide 0-$π$ oscillations in the Josephson current. This feature can be used to discriminate this pairing state from the conventional s-wave symmetry. The 0-$π$ oscillations appear both as a function of the ratio of the interface resistances for each band and, more importantly, as a function of temperature, which greatly aids in their detection.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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