Revival of Single-Particle Transport Theory for the Normal State of   High-Tc Superconductors: I. Relaxation-Time Approximation
  How the fluctuation-exchange (FLEX) approximation and the Fermi-liquid theory fail to explain the anomalous behavior of the Hall coefficient in the normal state of high-Tc superconductors is clarified. 
O. Narikiyo
cond-mat.str-el cond-mat.supr-con