MODELING OF TAMM-LIKE STATES IN SUPERLATTICES FROM A SIMPLE TIGHT-BINDING METHOD

Superlattices provide an excellent experimental tool for the study of surfacelike behavior in periodic structures such as a semiconductor cr ystal. Superlattices permit the construction of an arbitrary model sur face for a particular study. A simple tight-binding model describing t he existence of Tamm-like states in superlattices is presented. Using this method it is possible to derive the energy levels and the envelop e wave functions of the surfacelike states in an analytical form.