Electric field in gapless superconductors
The behavior of the electric field in gapless superconductors with a small pair-dissociation parameter is studied. The gapless superconductor state is assumed to be due to the presence of a low concentration of paramagnetic impurities or due to a magnetic field parallel to the surface of a thin film. In contrast to a high-concentration of paramagnetic impurities, it is necessary to evaluate the nonequilibrium distribution function for all energies. As a result, the penetration depth of an electric field differs from the coherence length and depends on the inelastic relaxation time. The inelastic effects are required to scatter particles to the low-energy region where the relaxation rate of the nonequilibrium distribution function is high. The effect of paramagnetic impurities and a magnetic field on the electric field in a superconductor is also discussed. It is shown that a low concentration of impurities and a weak magnetic field alter significantly the penetration depth of the electric field. With some qualifications, the present results remain valid even for superconductors with a gap.
- Research Organization:
- M. I. Kalinin Leningrad Polytechnic Institute
- OSTI ID:
- 6840868
- Journal Information:
- Sov. Phys. - Solid State (Engl. Transl.); (United States), Journal Name: Sov. Phys. - Solid State (Engl. Transl.); (United States) Vol. 19:11; ISSN SPSSA
- Country of Publication:
- United States
- Language:
- English
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