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Temperature Dependence of the Riedel Singularity

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Low Temperature Physics-LT 13

Abstract

The amplitude of the Josephson supercurrent in a superconducting tunnel junction is voltage (or frequency) dependent. Riedel1 has shown theoretically that within the simple BCS model the amplitude diverges logarithmically at a voltage V = 2Δ/e(Δ is the BCS gap parameter). In practice, however, this Riedel singularity in the supercurrent amplitude is rounded off by quasiparticle damping2,3 and gap anisotropy effects.4 It thus provides an experimental probe of these effects.

Research supported by the U.S. Army Research Office (Durham) and the Advanced Research Projects Agency.

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References

  1. E. Riedel, Z. Naturforsch. 19a, 1634 (1964).

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Author information

Authors and Affiliations

  1. Department of Physics and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania, USA

    S. A. Buckner & D. N. Langenberg

Authors
  1. S. A. Buckner
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  2. D. N. Langenberg
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Editor information

Editors and Affiliations

  1. Boulder, Colorado and National Science Foundation, University of Colorado, Washington, D.C., USA

    K. D. Timmerhaus

  2. University of Colorado, Boulder, Colorado, USA

    W. J. O’Sullivan

  3. Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico, USA

    E. F. Hammel

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© 1974 Springer Science+Business Media New York

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Buckner, S.A., Langenberg, D.N. (1974). Temperature Dependence of the Riedel Singularity. In: Timmerhaus, K.D., O’Sullivan, W.J., Hammel, E.F. (eds) Low Temperature Physics-LT 13. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-2688-5_56

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  • DOI: https://doi.org/10.1007/978-1-4684-2688-5_56

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4684-2690-8

  • Online ISBN: 978-1-4684-2688-5

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