VietNam 2013 

IXth Rencontres du Vietnam
Quy-Nhon, August 4-10, 2013

 QNplage

 Nanophysics: from fundamentals to applications

(the return)

 

Wednesday 7
Hybrid's

› 16:10 - 16:30 (20min)
Trapping hot quasi-particles in a high-power electronic cooler
Hung Nguyen  1, *@  , Matthias Meschke  1@  , Clemens Winkelmann  2@  , Herve Courtois  3@  , Jukka Pekola  1@  
1 : Low Temperature Laboratory  (OVLL)
Puumiehenkuja 2B, Otaniemi, Espoo -  Finland
2 : Institut Néel  (NEEL)  -  Website
CNRS : UPR2940, Université Joseph Fourier - Grenoble I, Institut National Polytechnique de Grenoble - INPG, Institut National Polytechnique de Grenoble (INPG)
25 avenue des Martyrs - BP 166 38042 GRENOBLE CEDEX 9 -  France
3 : Institut Néel  (NEEL)  -  Website
CNRS : UPR2940, Université Joseph Fourier - Grenoble I, Institut National Polytechnique de Grenoble - INPG, Institut National Polytechnique de Grenoble (INPG)
25 avenue des Martyrs - BP 166 38042 GRENOBLE CEDEX 9 -  France
* : Corresponding author

The performance of hybrid superconducting electronic coolers is usually limited by the accumulation of hot quasi-particles in the superconducting leads. This is all the more stringent in large-scale and high-power devices, as required by applications. Introducing a metallic drain connected to the superconducting electrodes via a fine-tuned tunnel barrier, we efficiently remove quasi-particles and obtain an electronic cooling from 300 mK down to 130 mK with a 400 pW cooling power. A simple thermal model accounts for the experimental observations.


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