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Enhancement of Superconductivity in Disordered Films by Parallel Magnetic Field

M. Yu. Kharitonov·M. V. Feigel'man
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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 parallel magnetic field H. This effect is due to 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 {\it superconductivity induced by magnetic field} is predicted: superconducting transition temperature T_c(H) is found to be nonzero in the range of magnetic fields $0 < H^* <= H <= H_c$.

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M. Yu. Kharitonov, M. V. Feigel'man. 2005-04-18. Enhancement of Superconductivity in Disordered Films by Parallel Magnetic Field. https://doi.org/10.1134/1.2142869

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