Author： Villegas Kristian
Publisher： Springer Publishing Company
ISSN： 1557-1939
Source： Journal of Superconductivity and Novel Magnetism, Vol.25, Iss.6, 2012-08, pp. : 1873-1877
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Abstract
Using an effective Hamiltonian derived from spin polaron theory, the Josephson tunneling current between two high temperature superconductors is calculated. The method makes use of the Matsubara Green's function and a canonical transformation analogous to the Schrieffer-Wolff transformation. The Josephson tunneling current is then obtained in terms of the energy gap function and the tunneling matrix, and it was found to have some similarities with the BCS result.
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