A p-Wave Superconductor under Externally Applied Weak Fields. II : Response Functions and Collective Modes : Condensed Matter and Statistical Physics

概要

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On the basis of the formalism developed in I (the preceding paper), we give a theory of response of an ideal p-wave superconductor to external weak perturbation. We locate in response functions the collective poles characteristic to respective phases, thereby pay a special attention to the gauge invariance and the Coulomb interaction. In transverse response, there may occur a pole to be called breathing and another orbital mode for a polar phase, the normal- and superflapping modes as well as the clapping mode for an ABM or planar phase, and the squashing mode for a BW phase, respectively. There may also appear in longitudinal response, besides the plasmon common to all the phases, the poles listed respectively in respective phases, but with an overall enhancement of their residues due to the long-rangeness of the Coulomb potential. Taking advantage of the termwise gauge invariance we also analyse the static kernel to study the magnetic penetration depths in the London limit.
理論物理学刊行会の論文
1987-03-25