I have gone through the paper by Davide Innocenti et al. [J Supercond Nov Magn, 24_1137 (2011)] where they provided the information about the shape resonance at Lifshitz transition in multiband superconductors. Is there any proper explanation for the superconducting TC enhancement or TC decrement with the presence of Feshbach resonance /shape resonance in superconducting materials? If yes, then is it always related with the multiband nature of superconductivity or can be apply for single band superconductors also.
Thanks Dr. Farid, for suggesting a good book !
I have some confusions that whether the feshbach resonance or shape resonance has some significance for superconductivity or not, if yes, then how it affect the superconductivity, is it favourable for superconductivity or deleterious?
Is this high partial wave feshbach resonance? （I'm just guessing）
Shape resonance is a metastable state in which an electron is trapped due to the shape of a potential barrier. And the barrier is usually the central barrier of high partial wave. As for Feshbach resonance, it manifests itself as a quasi-bound state in the potential of an excited state which is embedded into the dissociation or ionization continuum of the initial state.
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