Quantum fluctuations in continuous superconducting films View Full Text


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Article Info

DATE

1988-12

AUTHORS

Ulrich Eckern, Frank Pelzer

ABSTRACT

Motivated by recent experiments on ultrathin continuous superconducting films, we study the dependence ofTc and Δ (for zero temperatures) on the film thicknessd. Using field-theoretical methods, we express the Coulomb interaction in terms of a fluctuating potential, and the fluctuation correction to the free energy (in one-loop approximation) is determined. Based on the standard dirty-limit expressions for the response functions, we findTc and Δ by a numerical investigation of the gap equation. Generally, we find that the decrease ofTc and Δ vs.d−1 is quite similar, but depends sensitively on both the large-wave-vector cut-off and the strength of the interaction. In particular, however, for a strong interaction (Coulomb interaction), the order parameter is more strongly suppressed than the critical temperature, which is due to long-wavelength fluctuations of the phase and the potential. More... »

PAGES

433-457

References to SciGraph publications

  • 1984-09. Weak localization and coulomb interaction in disordered systems in ZEITSCHRIFT FÜR PHYSIK B CONDENSED MATTER
  • 1984. Quantum Dynamics of Superconductors and Tunneling between Superconductors in PERCOLATION, LOCALIZATION, AND SUPERCONDUCTIVITY
  • 1975-07. Linearized kinetic equations and relaxation processes of a superconductor near Tc in JOURNAL OF LOW TEMPERATURE PHYSICS
  • 1981. Kinetic Equations for Dirty Superconductors in NONEQUILIBRIUM SUPERCONDUCTIVITY, PHONONS, AND KAPITZA BOUNDARIES
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    http://scigraph.springernature.com/pub.10.1007/bf00683572

    DOI

    http://dx.doi.org/10.1007/bf00683572

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