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Complementary Analysis of the Field Perturbation Theory of Superconductivity

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Abstract

We reexamine the Nambu–Gorkov perturbation theory of superconductivity. We suggest that any field perturbation theory of superconductivity should be based on the Bogoliubov–Valatin (BV) quasi-particles. We show that two such different fields (and two additional analogous fields) may be constructed on the basis of this suggestion. The Nambu field is only one of them. For the field that is different than Nambu’s, the coherence field, the interaction is given by means of two interaction vertices that are based on the Pauli matrices τ1 and τ3. Consequently, the Hartree integral for the off-diagonal pairing self-energy may be finite, and in some cases large. We interpret the results in terms of conventional superconductivity and also discuss briefly the possible implications to HTSC.

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Authors and Affiliations

  1. Department of Physics, Ben-Gurion University, Beer-Sheva, 84105, Israel

    Moshe Dayan

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  1. Moshe Dayan
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Correspondence to Moshe Dayan.

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Dayan, M. Complementary Analysis of the Field Perturbation Theory of Superconductivity. J Supercond 19, 477–484 (2006). https://doi.org/10.1007/s10948-006-0134-2

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  • DOI: https://doi.org/10.1007/s10948-006-0134-2

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