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Weak links in proximity-superconducting two-dimensional electron systems

机译:邻近超导二维电子系统中的弱连接

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摘要

We find a giant inverse proximity effect that arises in small, low-dimensional superconductor-normal-superconductor (S/N/S) junctions, where a proximity coherence length is larger than the coherence length of a source superconductor, due to a huge backaction exerted by normal conductors on the proximity superconducting regions. Inverse proximity develops even in case where dimensions of the normal parts are smaller than the proximity coherence length and significantly suppresses superconducting characteristics of the entire system, including critical current, well below those for the usual S/N/S structures.
机译:我们发现在小的,低维超导体-法向超导体(S / N / S)结中会出现巨大的逆邻近效应,由于巨大的反作用,其邻近相干长度大于源超导体的相干长度由正常导体施加在邻近的超导区域上。甚至在正常部分的尺寸小于接近相干长度的情况下,也会出现反向接近,并且大大抑制了整个系统的超导特性,包括临界电流,远低于常规S / N / S结构的超导特性。

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