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arXiv 1109.6281cond-mat.supr-con
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约瑟夫森结中的印迹相整流

Rectification by imprinted phase in a Josephson junction

G. R. Berdiyorov, M. V. Milošević, L. Covaci, F. M. Peeters

摘要:

在约瑟夫森结中,由于附近的阿布里科索夫涡旋(AV)被钉扎,可以引起约瑟夫森相移.对于沿结的压印相位的不对称分布(由AV的位置控制),这种简单的系统能够在宽的和可调谐的频率范围内整流$ac$电流。由此产生的整流电压是约瑟夫森antivortex的定向运动的结果,该antivortex在局部平衡时与AV形成对。所提出的通过印记相位实现棘轮电势比结本身的非对称几何形状更有效,它容易在实验上实现,并且即使在没有施加磁场的情况下也提供整流。

英文摘要:

A Josephson phase shift can be induced in a Josephson junction by a strategically nearby pinned Abrikosov vortex (AV). For an asymmetric distribution of imprinted phase along the junction (controlled by the position of the AV) such a simple system is capable of rectification of $ac$ current in a broad and tunable frequency range. The resulting rectified voltage is a consequence of the directed motion of a Josephson antivortex which forms a pair with the AV when at local equilibrium. The proposed realization of the ratchet potential by imprinted phase is more efficient than the asymmetric geometry of the junction itself, it is easily realizable experimentally, and provides rectification even in the absence of applied magnetic field.

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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