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arXiv 1003.5154cond-mat.supr-con
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邻近超导体的热导

Thermal conductance of a proximity superconductor

J. T. Peltonen, P. Virtanen, M. Meschke, J. V. Koski, T. T. Heikkilä, J. P. Pekola

摘要:

研究了正常金属-超导体-正常金属混合结构中的热输运问题.我们发现,由于逆邻近效应,短超导导线的热导会大大增强,超过BCS值。测量结果与基于准经典超导理论的扩散极限模型一致。我们确定一个交叉温度低于准粒子热传导占主导地位的电子-声子弛豫。

英文摘要:

We study heat transport in hybrid normal metal - superconductor - normal metal (NSN) structures. We find the thermal conductance of a short superconducting wire to be strongly enhanced beyond the BCS value due to inverse proximity effect. The measurements agree with a model based on the quasiclassical theory of superconductivity in the diffusive limit. We determine a crossover temperature below which quasiparticle heat conduction dominates over the electron-phonon relaxation.

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