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Conductivity Due to Classical Phase Fluctuations in a Model For High-T_c Superconductors

S. Barabash·D. Stroud·I. -J. Hwang
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Abstract

We consider the real part of the conductivity, σ_1(ω), arising from classical phase fluctuations in a model for high-T_c superconductors. We show that the frequency integral of that conductivity, \int_0^\infty σ_1 dω, is non-zero below the superconducting transition temperature $T_c$, provided there is some quenched disorder in the system. Furthermore, for a fixed amount of quenched disorder, this integral at low temperatures is proportional to the zero-temperature superfluid density, in agreement with experiment. We calculate σ_1(ω) explicitly for a model of overdamped phase fluctuations.

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S. Barabash, D. Stroud, I. -J. Hwang. 2000-02-22. Conductivity Due to Classical Phase Fluctuations in a Model For High-T_c Superconductors. https://doi.org/10.1103/physrevb.61.r14924

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