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Theory of Flux-Flow Resistivity near $H_{c2}$ for s-wave Type-II Superconductors

Takafumi Kita
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Abstract

This paper presents a microscopic calculation of the flux-flow resistivity $ρ_{f}$ for s-wave type-II superconductors with arbitrary impurity concentrations near the upper critical field $H_{c2}$. It is found that, as the mean free path $l$ becomes longer, $ρ_{f}$ increases gradually from the dirty-limit result of Thompson [Phys. Rev. B{\bf 1}, 327 (1970)] and Takayama and Ebisawa [Prog. Theor. Phys. {\bf 44}, 1450 (1970)]. The limiting behaviors suggest that $ρ_{f}(H)$ at low temperatures may change from convex downward to upward as $l$ increases, thus deviating substantially from the linear dependence $ρ_{f}\propto H/H_{c2}$ predicted by the Bardeen-Stephen theory [Phys. Rev. {\bf 140}, A1197 (1965)].

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Takafumi Kita. 2003-07-03. Theory of Flux-Flow Resistivity near $H_{c2}$ for s-wave Type-II Superconductors. https://doi.org/10.1143/jpsj.73.21

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