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arXiv 2202.08039cond-mat.supr-concond-mat.mes-hall
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单通道 Josephson 结中的负临界电流

Negative critical currents in single-channel Josephson junctions

A. V. Rozhkov, Tony Liu, A. V. Andreev, B. Z. Spivak

AI总结:

本文理论研究 Coulomb 阻塞区一维导体连接两超导引线的 Josephson 耦合,证明单通道结中负临界电流普遍存在,并随正常区电子数奇偶交替。

摘要:

我们认为,在由单通道导体形成的 Josephson 结中,负临界电流会普遍出现。具体而言,我们从理论上研究了在 Coulomb 阻塞区由一维导体连接的两个超导引线之间的 Josephson 耦合。我们表明,在洁净区,临界电流的符号随正常区域中的电子数交替变化。对于奇数占据,即使导体上的电子数很大,临界电流仍为负。

英文摘要:

We argue that negative critical currents arise generically in Josephson junctions formed by single channel conductors. Specifically, we theoretically study the Josephson coupling between two superconducting leads connected by a one-dimensional conductor in the Coulomb blockade regime. We show that in the clean regime the sign of the critical current alternates with the number of electrons in the normal region. For odd occupancy the critical current is negative even when the number of electrons on the conductor is large.

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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