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Electron Cooling and Control of Josephson Current at Sub-Kelvin Temperatures

  • A. M. Savin
  • J. T. Flyktman
  • F. Giazotto
  • J. P. Pekola
Article
  • 78 Downloads

The factors limiting cooling electrons by biased tunnel junctions have been considered. At low temperature range the deviation from equilibrium, superconductor overheating and states within the superconductor gap limit the achievable minimum temperature. Strong increase of electron–phonon coupling at higher temperature limits the temperature range of effective electron cooling to sub-Kelvin region. Control of Josephson coupling in superconductor-normal metal-superconductor weak link by electron cooling in normal electrode has been demonstrated experimentally.

KEYWORDS:

electron cooling refrigeration SINIS 

REFERENCES

  1. 1.
    M. Nahum, T. M. Eiles, and J. M. Martinis, Appl. Phys. Lett. 65, 3123 (1994).CrossRefGoogle Scholar
  2. 2.
    M. M. Leivo, J. P. Pekola, and D. V. Averin, Appl. Phys. Lett. 68, 1996 (1996).CrossRefGoogle Scholar
  3. 3.
    J. P. Pekola, D. V. Anghel, T. I. Suppula, J. K. Suoknuuti, A. J. Manninen, and M. Manninen, Appl. Phys. Lett. 76, 2782 (2000).CrossRefGoogle Scholar
  4. 4.
    A. J. Manninen, M. M. Leivo, and J. P. Pekola, Appl. Phys. Lett. 70, 1885 (1997).CrossRefGoogle Scholar
  5. 5.
    J. P. Pekola, T. T. Heikkilä, A. M. Savin, J. T. Flyktman, F. Giazotto, and F. W. J. Hekking, Phys. Rev. Lett. 92, 056804 (2004).CrossRefPubMedGoogle Scholar
  6. 6.
    A. M. Clark, A. Williams, S. T. Ruggiero, M. L. van den Berg, and J. N. Ullom, Appl. Phys. Lett. 84, 625 (2004).CrossRefGoogle Scholar
  7. 7.
    A. Bardas, and D. Averin, Phys. Rev. B 52, 12873 (1995).CrossRefGoogle Scholar
  8. 8.
    J. Jochum, C. Mears, S. Golwala, B. Sadoulet, J. P. Castle, M. F. Cunningham, O. B. Drury, M. Frank, S. E. Labov, F. P. Lipschultz, H. Netel, and B. J. Neuhauser, Appl. Phys. 83, 3217 (1998).CrossRefGoogle Scholar
  9. 9.
    M. A. Tarasov, L. S. Kuzmin, M. Yu. Fominskii, I. E. Agulo, and A. S. Kalabukhov, JETP Lett. 78, 714 (2003).CrossRefGoogle Scholar
  10. 10.
    F. Giazotto, F. Taddei, T. T. Heikkilä, R. Fazio, and F. Beltram, Appl. Phys. Lett. 83, 2877 (2003).CrossRefGoogle Scholar
  11. 11.
    A. F. Andreev, Zh. Eksp. Teor. Fiz. 46, 1823 (1964).Google Scholar
  12. 12.
    F. C. Wellstood, C. Urbina, and J. Clarke, Phys. Rev. B 49, 5942 (1994).CrossRefGoogle Scholar
  13. 13.
    F. Giazotto, T. T. Heikkilä, F. Taddei, Rosario Fazio, J. P. Pekola, and F. Beltram, Phys. Rev. Lett. 92, 137001 (2004)CrossRefPubMedGoogle Scholar
  14. 14.
    A. Savin, M. Prunnila, J. Ahopelto, P. Kivinen, P. Törmä and J. Pekola, Physica B 329–333, 1481 (2003)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • A. M. Savin
    • 1
  • J. T. Flyktman
    • 1
  • F. Giazotto
    • 2
  • J. P. Pekola
    • 1
  1. 1.Low Temperature LaboratoryHelsinki University of TechnologyEspooFinland
  2. 2.NEST-INFM & Scuola Normale SuperiorePisaItaly

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