Concept behind plasma and structural resistivities of liquid alkali metals

The electrical resistivity of liquid,alkali metals has been discussed on the basis of Ziman formulation with special emphasis to plasma and structural contributions. Two earlier relationship of Ascarelli et al., [Adv Phys, 16 (1967) 263, 717] [APH], (i) s(q) = [{(phi(q)/k(B)T]+1](-1) and (ii) phi(q) = (4 pi e(2)/Omega(2)q(2))(-1) U-2(q)epsilon(q) have been improved and utilized in evaluating the plasma resistivity of alkali metals. The validity of modified form [Indian J Pure & Appl Phys, 28 (1990) 397] of structure factor-pair potential relationship s(q) = [[{(phi(0) G(q)/k(B)T}+1](-1) has been tested herein evaluating plasma resistivity rho(L)(pl). There appears an important role of total electronic band structural energy G(q) to the transport problems. This analogy has produced already satisfactory results of liquid phonon frequencies of alkali metals and here also the obtained results of resistivity are improved than rho(APH) values. The study confirms the validity of following formulae too:s(o)phi(o) = k(B)T and s(o)\U(o)\(2) = (2/3ZE(F))k(B)T = 0.1 u(g)(2) where u(g) is of the order of nearly 0.5 \U(o)\.