%0 Journal Article
%A Méndez Martín, María Bianchi
%A Domínguez-Adame Acosta, Francisco
%T Exact-solutions of 2-band models of graded-gap superlattices
%D 1994
%@ 0370-1972
%U https://hdl.handle.net/20.500.14352/58967
%X 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.
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