Anomalous properties of the Kronig–Penney model with compositional and structural disorder

We study the localisation properties of the eigenstates in the Kronig–Penney model with weak compositional and structural disorder. The main result is an expression for the localisation length that is valid for any kind of self- and inter-correlations of the two types of disorder. We show that the interplay between compositional and structural disorder can result in anomalous localisation.