X. Speculations on the Energy Band Structure of Zinc-Blende-Type Crystals∗

We have developed a semi-empirical perturbation scheme for the purpose of relating the energy band structures of diamond-type and zinc-blende-type crystals. Our sole objective is to predict the approximate location of the valence and conduction band edges in the reduced zone for some of the better known zinc-blende-type crystals. In this paper we explain how the perturbation scheme operates. Since a more complete account will appear in The Physical Review (Herman 1955), we will restrict ourselves here only to the essentials. A brief discussion of the effect of the spin-orbit interaction upon the band structure of zinc-blende-type crystals is also included in the present paper. † Communicated by the Author. Notes † Communicated by the Author. ∗ Presented at the Symposium on Intermetallic Semi-Conductors, Baldock, England, on 27 April 1955, and also at the American Physical Society Meeting at Washington, D.C., on 28 April 1955. The present version is somewhat different from the original one.