Abstract
The effect of dimensional quantization on the density of states in amorphous semiconductors is studied theoretically. The disorder is treated as a random potential with zero correlation length (‘‘white noise’’). The transition of the density of states from staircase to smooth behavior with increasing disorder is traced for high-energy electrons and it was found to occur at substantially smaller film thicknesses than in experimental data. The possibility of resolving this contradiction in other models of disorder is discussed.
- Received 23 October 1989
DOI:https://doi.org/10.1103/PhysRevB.41.7701
©1990 American Physical Society