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Theory of coexistence of superconductivity and ferroelectricity

Y. Krivolapov·A. Mann·Joseph L. Birman
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Abstract

A new investigation of the coexistence and competition of ferroelectricity and superconductivity is reported. In particular we show that the starting Hamiltonian of a previous study by Birman and Weger (2001) can be exactly diagonalized. The result differs significantly from mean-field theory. A Hamiltonian with a different realization of the coupling between ferroelectricity and superconductivity is proposed. We report the results for mean-field theory applied to this Hamiltonian. We find that the order parameters are strongly affected by this coupling.

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Y. Krivolapov, A. Mann, Joseph L. Birman. 2006-01-18. Theory of coexistence of superconductivity and ferroelectricity. https://doi.org/10.1103/physrevb.75.092503

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