Ground state in a nonzero moment pairing system. II. Collective excitations

Abstract

Collective excitations in the Gor'kov-Galitskii scheme are investigated. It is proved that the solutions are stable. When k = 0, excitations with ω2 = 0, 4Δ2 are accompanied by gap excitations corresponding to states with a nonzero moment of two Cooper pairs. The use of photon spherical functions in the case of triplet pairing leads to a significant simplification of the calculation.

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Identifiers

DOI

10.1063/10.0029283

Citations and references