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Calculation of the effect of random superfluid density on the temperature dependence of the penetration depth

机译:计算随机超流体密度对熔深深度的温度依赖性的影响

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摘要

Microscopic variations in composition or structure can lead to nanoscale inhomogeneity in superconducting properties such as the magnetic penetration depth, but measurements of these properties are usually made on longer length scales. We solve a generalized London equation with a non-uniform penetration depth λ(r), obtaining an approximate solution for the disorder-averaged Meissner screening. We tind that the effective penetration depth is different from the average penetration depth and is sensitive to the details of the disorder. These results indicate the need for caution when interpreting measurements of the penetration depth and its temperature dependence in systems which may be inhomogeneous.
机译:成分或结构的微观变化可导致超导特性(例如磁穿透深度)的纳米级不均匀性,但通常在较长的长度范围内对这些特性进行测量。我们用非均匀的穿透深度λ(r)求解了一个广义的伦敦方程,从而获得了平均无序Meissner筛选的近似解。我们希望有效的穿刺深度不同于平均穿刺深度,并且对疾病的细节很敏感。这些结果表明在解释可能不均匀的系统中的渗透深度及其温度依赖性的测量时需要谨慎。

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