SCALING OF THE TEMPERATURE-DEPENDENT HALL-EFFECT IN LA2-XSRXCUO4

A new aspect of the charge dynamics in layered metallic cuprates has b een discovered in the study of the in-plane Hall coefficient (R(H)) in La2-xSrxCuO4 over a wide temperature (4-500 K) and composition (0 < x < 0.35) range. The strongly temperature dependent R(H), a hallmark of cuprate superconductors, is found to be the low temperature part of a simple functional form f(T/T) which becomes constant for T > T*. Thi s form, followed for x greater-than-or-equal-to 0.15, has a characteri stic temperature T which is high at the optimal composition (x = 0.15 ) and decreases with increasing Sr concentration, similar to a tempera ture scale deduced from magnetic susceptibility.