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arXiv 0811.1720cond-mat.supr-con
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轨道平行磁场效应驱动的薄膜超导绝缘体转变

Superconductor insulator transition in thin films driven by an orbital parallel magnetic field effect

Dganit Meidan, Yuval Oreg

摘要:

从理论上研究了平行磁场作用于无序超导薄膜的轨道效应。我们发现,该领域降低了相位刚度,并导致强烈的量子相位波动驱动系统进入绝缘行为。这个微观模型表明,临界场随薄层电阻的减小而减小,与最近的实验结果一致。这个模型的预测可以用来区分自旋和轨道效应。我们发现A. Johansson \textit{et al.}更符合轨道机制。

英文摘要:

We study theoretically orbital effects of a parallel magnetic field applied to a disordered superconducting film. We find that the field reduces the phase stiffness and leads to strong quantum phase fluctuations driving the system into an insulating behavior. This microscopic model shows that the critical field decreases with the sheet resistance, in agreement with recent experimental results. The predictions of this model can be used to discriminate spin and orbital effects. We find that experiments conducted by A. Johansson \textit{et al.} are more consistent with the orbital mechanism.

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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