RT Journal Article T1 Exact-solutions of 2-band models of graded-gap superlattices A1 Méndez Martín, Bianchi A1 Domínguez-Adame Acosta, Francisco AB We have theoretically investigated two-band models of graded-gap superlattices within the envelope-function approximation. Assuming that the gap varies linearly with spatial coordinate, we are able to find exact solutions of the corresponding Dirac-like equation describing the conduction- and valenceband envelope-functions. The dispersion relation inside allowed miniband of the superlattice may be expressed in terms of confluent hypergeometric functions in a closed form. PB Akademie Verlag GMBH SN 0370-1972 YR 1994 FD 1994-08 LK https://hdl.handle.net/20.500.14352/58967 UL https://hdl.handle.net/20.500.14352/58967 LA eng NO © Wiley-VCH Verlag. DS Docta Complutense RD 3 may 2024