M. Steslicka et al., KRONIG-PENNEY-TYPE MODEL FOR SEMIINFINITE SUPERLATTICES .1. A COMMENTON SURFACE-STATE ENERGY EXPRESSION, Progress in Surface Science, 46(2-3), 1994, pp. 219-223
Energy spectrum of surface states in a semi-infinite superlattice repr
esented by a Kronig-Penney-type model, calculated via the direct match
ing procedure and transfer matrix approach, is examined critically. A
possibility of appearance of infinite barrier localized states, not co
rresponding to true surface states, is discussed in detail.