  We use the Surface Green Function Matching (SGFM) method and a tight-binding
hamiltonian to calculate the (100)-surface electronic band structure and local
density of states of the series of Cu-based A^{I}B^{III}C2^{VI} chalcopyrites .
We find four surface states in the optical gap energy region of s-p character
and three surface states in the conduction band region of p-character. We show
the trends of different characteristics within the series by means of figures
and tables so that the quantitave behavior can be evaluated as well. We did not
find Frontier Induced Semi-Infinite states of non-dispersive character in the
studied range of energy within the valence band as we found in the case of the
(112) surface electronic band structure for CuInSe2.

Materials Science