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arXiv 1006.4124cond-mat.supr-con
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涨落库珀对的量子涨落与动态成团

Quantum Fluctuations and Dynamic Clustering of Fluctuating Cooper Pairs

A. Glatz, A. A. Varlamov, V. M. Vinokur

摘要:

本文导出了二维超导体在上临界场H_{c2}(T)以上的整个涨落区中涨落电导率随温度和磁场变化的精确表达式。我们着眼于零温附近的量子相变,提出当磁场从上方接近H_{c2}(0)附近的谱线时,由相干旋转涨落库珀对组成的团簇形成了一种特殊的动力学状态,并估计了这种团簇的特征尺寸和寿命.我们发现层状超导体的横向磁导率在H_{c2}(0)以上与零温磁场有关。

英文摘要:

We derive exact expressions for the fluctuation conductivity in two dimensional superconductors as a function of temperature and magnetic field in the whole fluctuation region above the upper critical field H_{c2}(T). Focusing on the vicinity of the quantum phase transition near zero temperature, we propose that as the magnetic field approaches the line near H_{c2}(0) from above, a peculiar dynamic state consisting of clusters of coherently rotating fluctuation Cooper-pairs forms and estimate the characteristic size and lifetime of such clusters. We find the zero temperature magnetic field dependence of the the transverse magnetoconductivity above H_{c2}(0) in layered superconductors.

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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