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arXiv 1002.4203cond-mat.dis-nncond-mat.mes-hallcond-mat.supr-con
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有限厚度无序超导薄膜中的位相涨落

Phase fluctuations in finite thickness disordered superconducting thin films

Y. Dubi, R. R. Biswas, A. V. Balatsky

摘要:

本文从理论上研究了有限厚度层状超导薄膜中的位相涨落。该模型由一组层组成,通过仅相作用中的类似梯度的项相互耦合。结果表明,整个系统的有效相位刚度是成正比的厚度(即个别层的数量)。这一结果导致超导体-绝缘体转变和$T_c$的厚度,$T_c\sim d^{-1}$,无论是在符合实验结果的反向依赖。无序薄膜的相关性进行了讨论。

英文摘要:

Phase fluctuations in finite thickness layered superconducting films are studied theoretically. The model consists of a set of layers, coupled to each other via a gradient-like term in the phase-only action. It is shown that the effective phase stiffness of the whole system is proportional to its thickness (i.e. the number of individual layers). This result leads to a superconductor-insulator transition and an inverse dependence of $T_c$ on thickness,$T_c\sim d^{-1}$, both in accord with the experimental findings. The relevance to disordered thin films is discussed.

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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