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Phonon bottleneck in graphene-based Josephson junctions at millikelvin temperatures.

Publication ,  Journal Article
Borzenets, IV; Coskun, UC; Mebrahtu, HT; Bomze, YV; Smirnov, AI; Finkelstein, G
Published in: Physical review letters
July 2013

We examine the nature of the transitions between the normal and superconducting branches in superconductor-graphene-superconductor Josephson junctions. We attribute the hysteresis between the switching (superconducting to normal) and retrapping (normal to superconducting) transitions to electron overheating. In particular, we demonstrate that the retrapping current corresponds to the critical current at an elevated temperature, where the heating is caused by the retrapping current itself. The superconducting gap in the leads suppresses the hot electron outflow, allowing us to further study electron thermalization by phonons at low temperatures (T≲1 K). The relationship between the applied power and the electron temperature was found to be P∝T3, which we argue is consistent with cooling due to electron-phonon interactions.

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Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

July 2013

Volume

111

Issue

2

Start / End Page

027001

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

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Borzenets, I. V., Coskun, U. C., Mebrahtu, H. T., Bomze, Y. V., Smirnov, A. I., & Finkelstein, G. (2013). Phonon bottleneck in graphene-based Josephson junctions at millikelvin temperatures. Physical Review Letters, 111(2), 027001. https://doi.org/10.1103/physrevlett.111.027001
Borzenets, I. V., U. C. Coskun, H. T. Mebrahtu, Yu V. Bomze, A. I. Smirnov, and G. Finkelstein. “Phonon bottleneck in graphene-based Josephson junctions at millikelvin temperatures.Physical Review Letters 111, no. 2 (July 2013): 027001. https://doi.org/10.1103/physrevlett.111.027001.
Borzenets IV, Coskun UC, Mebrahtu HT, Bomze YV, Smirnov AI, Finkelstein G. Phonon bottleneck in graphene-based Josephson junctions at millikelvin temperatures. Physical review letters. 2013 Jul;111(2):027001.
Borzenets, I. V., et al. “Phonon bottleneck in graphene-based Josephson junctions at millikelvin temperatures.Physical Review Letters, vol. 111, no. 2, July 2013, p. 027001. Epmc, doi:10.1103/physrevlett.111.027001.
Borzenets IV, Coskun UC, Mebrahtu HT, Bomze YV, Smirnov AI, Finkelstein G. Phonon bottleneck in graphene-based Josephson junctions at millikelvin temperatures. Physical review letters. 2013 Jul;111(2):027001.

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

July 2013

Volume

111

Issue

2

Start / End Page

027001

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences