RESIDUAL RESISTIVITY DUE TO VACANCIES IN ALKALI-METALS

We have used a pseudopotential technique to examine the contribution o f monovacancy, which is one of the point defects, to the resistivity o f alkali metals. Two different forms of the bare-ion local pseudopoten tial, to describe the electron-ion interaction in metals, have been em ployed in the present work. Various forms of the dielectric function h ave been used to incorporate the exchange and correlation effects amon g the conduction electrons. Varying effect of dielectric functions on the computed results is concluded while comparing our findings with ot her theoretical data.