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arXiv 0709.4180cond-mat.supr-con
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通过电流诱导超导相梯度探测局部超流密度

Local superfluid densities probed via current-induced superconducting phase gradients

David S. Hopkins, David Pekker, Tzu-Chieh Wei, Paul M. Goldbart, Alexey Bezryadin

摘要:

我们开发了一种超导相位梯度计,由两个平行的DNA模板纳米线连接两个薄膜引线组成。我们已经斜坡的交叉电流垂直流动的纳米线,并观察到的振荡,由于交叉电流引起的相位差的铅到铅的电阻。利用该梯度计,我们测量了超流密度随温度和磁场的变化,并观察到由弹性涡旋位移引起的相位梯度的放大。我们检查我们的数据,在光的米勒-Barclay理论的脏超导体和坎贝尔的场渗透模型的微观版本。

英文摘要:

We have developed a superconducting phase gradiometer consisting of two parallel DNA-templated nanowires connecting two thin-film leads. We have ramped the cross current flowing perpendicular to the nanowires, and observed oscillations in the lead-to-lead resistance due to cross-current-induced phase differences. By using this gradiometer we have measured the temperature and magnetic field dependence of the superfluid density and observed an amplification of phase gradients caused by elastic vortex displacements. We examine our data in light of Miller-Bardeen theory of dirty superconductors and a microscale version of Campbell's model of field penetration.

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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