Nonlinear delocalization of excited states in disordered crystals
Ovsyankin V.V., Fedorov A. A.
Optical pumping above a certain critical level causes the luminescence-excitation spectrum of crystals of a disordered tysonite to assume the form expected for systems which have undergone Anderson derealization [P. W. Anderson, Phys. Rev. 109, 1492 (1958); Proc. Nat. Acad. Sci. USA A69, 1097 (1972)].