The Coherence Field in the Field Perturbation Theory of Superconductivity

Abstract

We re-examine the Nambu-Gorkov perturbation theory of superconductivity on the basis of the Bogoliubov-Valatin quasi-particles. We show that two different fields (and two additional analogous fields) may be constructed, and that the Nambu field is only one of them. For the other field- the coherence field- the interaction is given by means of two interaction vertices that are based on the Pauli matrices tau1 and tau3. 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 possible implications to HTSC.

References in corpus (4)

• Doping dependence of the Fermi surface in Bi(Pb)2212
• Surprises in the doping dependence of the Fermi surface in Bi(Pb)-2212
• Correlation pseudogaps in HTSC
• Double Correlations in HTSC

Cited by in corpus (2)

• Sketching the Theory of Copper Oxide High Temperature Superconductivity
• The Field Perturbation Theory of the Double Correlated Phase in High Temperature Superconductors