Enhancement of Superconductivity in Disordered Films by Parallel Magnetic Field

2005/04/18 by M. Yu. Kharitonov, M. V. Feigel'man · 1 citation
Physics and Astronomy · #cond-mat.supr-con #cond-mat.mes-hall

paper · pdf · doi:10.1134/1.2142869

published as JETP Lett. 82, 421 (2005) [Pis'ma Zh. Eksp. Teor. Fiz. 82, 473 (2005)] · 4 pages, 2 figures

arxiv created 2005/04/18 · arxiv updated 2009/12/01

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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