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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2009

Quasiparticle diffusion based heating in superconductor tunneling micro-coolers

Résumé

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.

Dates et versions

hal-00416217 , version 1 (13-09-2009)

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Bernard Pannetier, Hervé Courtois, Sukumar Rajauria. Quasiparticle diffusion based heating in superconductor tunneling micro-coolers. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2009, 80 (21), pp.214521. ⟨10.1103/PhysRevB.80.214521⟩. ⟨hal-00416217⟩

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