By combining the Emin-Holstein scaling theory of polaron formation with the scaling theory of localization in disordered systems, the authors show that the nonuniform extended eigenstates above the mobility edge (responsible for the continuous drop of the mobility to zero) collapse to localized polarons as the electron-phonon interaction is turned on.

• Received 15 July 1983

DOI:https://doi.org/10.1103/PhysRevLett.51.1202