Limitations in Cooling Electrons using Normal-Metal-Superconductor Tunnel Junctions

Physical Review Letters

Volumn 92, Issue 5, 2004, Pages 568041-568044

  Pekola, J P ^a   Heikkila T T ^a   Savin, A M ^a   Flyktman, J T ^a   Giazotto, F ^b   Hekking, F W J ^c  

^a AALTO UNIVERSITY   (Finland)

^b SCUOLA NORMALE SUPERIORE   (Italy)

^c CNRS   (France)

Author keywords

[No Author keywords available]

Indexed keywords

APPROXIMATION THEORY; COOLING; ELECTRIC CONDUCTANCE; ELECTRON BEAM LITHOGRAPHY; ELECTRONS; FERMI LEVEL; HEAT FLUX; HEATING; LOW TEMPERATURE EFFECTS; SUPERCONDUCTING MATERIALS;

ENERGY DISTRIBUTION; INJECTION JUNCTIONS;

TUNNEL JUNCTIONS;

EID: 1642276420     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (13)

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8. We assume resistive enough tunnel barriers, such that Andreev reflection can be neglected. We expect significant modifications of the results presented here in the case of highly transparent interfaces.
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10. -4 based on the strength of subgap heating [Fig. 1(b)], on the extrapolation of data in Ref. [9], and on the ratio ( ≃ η) of the conductances at low and high bias, respectively, of the measured junctions at low temperature.
11. W. M. van Huffelen, T. M. Klapwijk, D. R. Heslinga, M. J. de Boer, and N. van der Post, Phys. Rev. B 47, 5170 (1993).
12. C=0.1 in S1, a value well below any temperature measured here.
13. coll depends on N island properties only (not on δ).