The Critical Fluctuation of the Order Parameter in Type-II Superconductors

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概要

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• We study here the effect of the critical fluctuation (i. e. the thermodynamical fluctuation) of the order parameter in dirty type-II superconductors in a magnetic field H slightly above the upper critical field. We find that the fluctuation gives rise to a singular contribution to various transport coefficients, which diverge like (H-H_<c2>)^<-1/2>. It is shown at the same time that in the usual dirty superconductor (say, with the electronic mean free path l〜100Å), the above effects will probably be unaccessible experimentally, because of the smallness of the coefficient in front of the singular terms. However, in extremely dirty superconductors (say with l〜Å), we may expect significant modifications of the transport properties due to the fluctuation.

• 理論物理学刊行会の論文
• 1968-04-25

著者

• Maki Kazumi

  Research Institute For Mathematical Sciences Kyoto University : Department Of Physics Tohoku Univers

• Maki Kazumi

  Research Institute For Fundamental Physics Kyoto University

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