INTERPLANE CHARGE DYNAMICS IN LA2-XSRXCUO4

We present c-axis polarized optical spectrum sigma(c)(omega) and out-o f-plane Hall coefficient (R(H)c) in the normal state of La2-xSrxCuO4 a s a function of doping. While sigma(c)(omega) is dominated by a Drude- like peak at omega = 0 and R(H)c has finite negative values in the ove rdoped region, the low-energy sigma(c)(omega) severely suppressed and nearly omega independent, and R(H)c is very small for underdoped compo unds. The results provide evidence for different charge dynamics norma l to the planes and clearly demonstrate how the charge dynamics change s with doping.