Revival of Single-Particle Transport Theory for the Normal State of High-Tc Superconductors: II. Vertex Correction
classification
❄️ cond-mat.str-el
keywords
theorytransportapproximationcorrectionelectrichigh-tcnormalstate
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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.
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