Adsorption of II and VI groups atoms on the silicon carbide polytypes

Within the scope of the Haldane-Anderson model the estimates of charge transfer and adsorption energy for alkali metals and halogens atoms on the С- and Si-faces of 3$C$-, 6$H$- and 4$H$-SiC polytypes are obtained. Band and local states contributions to the formation of adatom's charge and ionic and metallic parts of the adsorption energy are clarified.