Dielectric constants ofAIBIIIC2VIandAIIBIVC2Vchalcopyrite semiconductors

A striking correlation has been found to exist between the ionic charge and dielectric constants of A I B III C 2 VI and A II B IV C 2 V chalcopyrite semiconductors. The dielectric constants of these compounds exhibit a linear relationship when plotted on a log–log scale against the nearest neighbour distance d (Å), but fall on different straight lines according to the product of ionic charges of the compounds. A fairly good agreement has been found between the observed and calculated values of the dielectric constants for A I B III C 2 VI and A II B IV C 2 V semiconductors.