THERMALLY-STIMULATED CURRENTS CONTROLLED BY FLUCTUATING LOCALIZED STATES

Thermally stimulated currents (TSC) are examined in a material with ra ndomly fluctuating energies of the localized states. It is shown that, under these conditions, distributions of the localized state density recovered from TSC data, represent distributions of effective activati on energies (DEAE) rather than the true density-of-state (DOS) functio n. The difference between DEAE and DOS increases with decreasing heati ng rate used to obtain the TSC transients, as well as with decreasing starting temperature. (C) 1997 Elsevier Science B.V.