Superconductivity in impurity bands |
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Authors: | A I Agafonov E A Manykin |
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Institution: | (1) Kurchatov Institute Russian Research Center, 123182 Moscow, Russia |
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Abstract: | We present a theory of superconductivity in doped insulators. In the magnetic metal state of the compound we obtain the self-consistency
equations for the superconducting state in the spin-dependent impurity bands of both extended and localized states in the
initial insulator gap. A BCS-type triplet pairing field is considered. We show that the superconducting gap in which single-electron
extended states do not exist is overlapped by the distribution of the localized states. The formation of a latent superconducting
gap is discussed in connection with the unusual properties of high-T
c
compounds.
Pis’ma Zh. éksp. Teor. Fiz. 65, No. 5, 419–424 (10 March 1997)
Published in English in the original Russian journal. Edited by Steve Torstveit. |
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Keywords: | |
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