Electronic Refrigeration at the Quantum Limit

被引：83

作者：

Timofeev, Andrey V. ^{[1
,2
]}

Helle, Meri ^{[1
]}

Meschke, Matthias ^{[1
]}

Mottonen, Mikko ^{[1
,3
,4
]}

Pekola, Jukka P. ^{[1
]}

机构：

[1] Helsinki Univ Technol, Low Temp Lab, Helsinki 02015, Finland

[2] Inst Solid State Phys, Lab Superconduct, Chernogolovka 142432, Russia

[3] Helsinki Univ Technol, Dept Appl Phys, Helsinki 02015, Finland

[4] Univ New S Wales, Australian Res Council, Ctr Excellence Quantum Comp Technol, Sydney, NSW 2052, Australia

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 20期

基金：

芬兰科学院;

关键词：

THERMAL CONDUCTANCE; AGITATION; METALS;

D O I：

10.1103/PhysRevLett.102.200801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate quantum-limited electronic refrigeration of a metallic island in a low-temperature microcircuit. We show that matching the impedance of the circuit enables refrigeration at a distance, of about 50 mu m in our case, through superconducting leads with a cooling power determined by the quantum of thermal conductance. In a reference sample with a mismatched circuit this effect is absent. Our results are consistent with the concept of electromagnetic heat transport. We observe and analyze the crossover between electromagnetic and quasiparticle heat flux in a superconductor.

引用

页数：4

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