MULTIVALUED DISTRIBUTIONS OF ELECTRONS AMONG VALLEYS IN MULTILAYER STRUCTURES AND P-N-JUNCTIONS

The formation of a domain (layered) structure in a transverse electric field in the course of the multivalued Sasaki effect in thin-layer sa mples on conducting substrates is examined theoretically. In such samp les, the electron density may vary substantially within a domain by vi rtue of a variation in the potential difference between the active lay er and the substrate. Such density variations lead to a threshold or l ower limit-a lower limit on the electron density for a given active-la yer-substrate capacitance-for the existence of transverse fields. Ther e is no such lower limit in bulk samples. This limit gives rise to a d omain structure of a new type. In this new structure, double layers wi th oppositely directed transverse fields are separated from each other by field-free regions with a low and fixed electron density.