R. Marquez et C. Rincon, ON THE DIELECTRIC-CONSTANTS OF A(I)B(III)C(2)(VI) CHALCOPYRITE SEMICONDUCTOR COMPOUNDS, Physica status solidi. b, Basic research, 191(1), 1995, pp. 115-119
Values of the static, epsilon(0), and high-frequency, epsilon(infinity
), dielectric constants of I-III-VI2 chalcopyrite compounds are estima
ted by using an empirical model proposed by Nag for cubic semiconducto
rs, which relates these constants to the average atomic number of its
constituent atoms Z(av). It is found, as in the cubic semiconductors,
that the inverse of both these constants is linearly related to Z(av).
It is also suggested that epsilon(0) and epsilon(infinity) thus obtai
ned should be more reliable than those calculated from the energy gap
E(g), due to the wide range of values of this parameter reported in so
me I-III-VI2 chalcopyrite compounds.