INTRINSIC TEMPERATURE DEPENDENCES OF TRANSPORT-COEFFICIENTS WITHIN THE HOT-SPOT MODEL FOR NORMAL-STATE YBA2CU3O7

The temperature dependences of the galvanomagnetic and thermoelectric transport coefficients within a generic hot-spot model are reconsidere d. Despite the recent success in explaining ac Hall effect data in YBa 2Cu3O7, a general feature of this model is as departure from the appro ximately universal temperature dependences observed for normal state t ransport in the optimally doped cuprates. In this paper, we discuss su ch systematic deviations and illustrate some of their effects through a concrete numerical example using the calculated band structure for Y Ba2Cu3O7.