Valence band offsets in multiple quantum wells

摘要

Calculations have been performed which show that cubic multiple quantum wells subject to variable their piezoelectric fields. We consider systems grown in arbitrary directions, with thickness larger than the critical value (overcritical systems). As applications to real systems, the piezoelectric fields in overcritical systems have been determined. Three possible cases of wells are presented, which change under thickness of the layers. Also, valence band offsets induced by piezoelectric fields are discussed. Finally, calculated data of valence band offsets for different real overcritical systems are given. All these results and conclusions are valid in linear region over which no phase transitions occur.