REDUCED SCREENING AT THE FERMI-SURFACE OF HIGH-T-C CUPRATES

We consider a low density electron gas (r(s) approximate to 10) imbedd ed in a highly dirpersive bachground, and show that the large dispersi on leads to a sharp and large velocity peak at k = k(F), which persist s in the presence of screening. This peak accounts for the anomalous t ransport properties of high-T-c cuprates in the normal state,the tempe rature dependence of the Hall effect and TEP, as well as the high valu e of T-c.