Electronic refrigeration at the quantum limit
| Autor: | Matthias Meschke, Mikko Möttönen, Meri Helle, Jukka P. Pekola, Andrey Timofeev |
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| Přispěvatelé: | Department of Applied Physics, Aalto-yliopisto, Aalto University, Perustieteiden korkeakoulu, School of Science, Teknillisen fysiikan laitos |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
electromagnetic heat transport
FOS: Physical sciences General Physics and Astronomy superconductors Superconductivity (cond-mat.supr-con) Thermal conductivity superconducting leads Condensed Matter::Superconductivity Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Magnetic refrigeration metallic islands Quantum Physics Superconductivity quantum limit Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Quantum limit Condensed Matter - Superconductivity Refrigeration Physics::Classical Physics microcircuits Heat flux Quasiparticle electronic refrigeration heat transport |
| Popis: | We demonstrate quantum limited electronic refrigeration of a metallic island in a low temperature micro-circuit. We show that matching the impedance of the circuit enables refrigeration at a distance, of about 50 um 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. 5 pages, 3 figures |
| Databáze: | OpenAIRE |
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