1301.5996 (Osamu Narikiyo)

Revival of Single-Particle Transport Theory for the Normal State of
High-Tc Superconductors: II. Vertex Correction    [PDF]

Osamu Narikiyo

The vertex correction for the electric current is discussed on the basis of the Fermi-liquid theory. It does not alter the qualitative description of the electric transport by the relaxation-time approximation in the case of the normal state of high-Tc superconductors. The failure of the transport theory employing the fluctuation-exchange (FLEX) approximation is pointed out. It becomes manifest by considering the Ward identity for the fluctuation mode.

View original: http://arxiv.org/abs/1301.5996