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Enhancement of superconductivity in disordered films by parallel magnetic field

  • M. Yu. Kharitonov
  • M. V. Feigelman
Condensed Matter

Abstract

We show that the superconducting transition temperature T c (H) of a very thin highly disordered film with strong spin-orbital scattering can be increased by a parallel magnetic field H. This effect is due to the polarization of magnetic impurity spins, which reduces the full exchange scattering rate of electrons; the largest effect is predicted for spin-1/2 impurities. Moreover, for some range of magnetic impurity concentrations, the phenomenon of superconductivity induced by magnetic field is predicted: the superconducting transition temperature T c (H) is found to be nonzero in the range of magnetic fields 0 < H* ≤ HH c .

PACS numbers

74.25.Ha 74.78.−w 74.78.Na 

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Copyright information

© Pleiades Publishing, Inc. 2005

Authors and Affiliations

  • M. Yu. Kharitonov
    • 1
    • 2
  • M. V. Feigelman
    • 1
  1. 1.Landau Institute for Theoretical PhysicsRussian Academy of SciencesMoscowRussia
  2. 2.Ruhr-Universität BochumBochumGermany

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