Influence of impurities on the solute electric field gradient in noncubics-pmetals

Abstract
A study of electric field gradients at nontransitional dilute impurities in polyvalent metals is reported. The electric field gradients show a systematic dependence on the valence difference between impurity and host. A charge-screening mechanism of conduction electrons, relating the density of impurity p states to the resulting field gradients, can explain the observed correlation.