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arXiv 0810.1911cond-mat.mes-hallcond-mat.mtrl-sci
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超导隧道微制冷器准粒子扩散加热

Quasiparticle diffusion based heating in superconductor tunneling micro-coolers

Bernard Pannetier, Herve' Courtois, Sukumar Rajauria

摘要:

在超导体-绝缘体-正常金属混合隧道结中,偏压在间隙下方,从正常金属中提取热电子导致电子冷却效应。注入超导体中的准粒子在隧道界面附近积累,从而提高了有效超导体温度。我们提出了一个简单的模型,多余的准粒子在一个额外的陷阱结超导带的扩散。这个扩散模型有一个完整的解析解,这取决于实验可访问的参数。我们发现结附近积累的准粒子降低了器件的效率。这项研究也是相关的更一般的情况下,利用超导隧道结,作为低温探测器。

英文摘要:

In a hybrid Superconductor - Insulator - Normal metal tunnel junction biased just below the gap, the extraction of hot electrons out of the normal metal results in electronic cooling effect. The quasiparticles injected in the superconductor accumulate near the tunnel interface, thus increasing the effective superconductor temperature. We propose a simple model for the diffusion of excess quasiparticles in a superconducting strip with an additional trap junction. This diffusion model has a complete analytic solution, which depends on experimentally accessible parameters. We find that the accumulated quasiparticles near the junction reduce the efficiency of the device. This study is also relevant to more general situations making use of superconducting tunnel junctions, as low temperature detectors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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