Formation of a self-consistent double quantum well in a wide p-type quantum well

摘要

The process of formation of self-consistent double quantum wells (DQWs) in a wide p-type quantum well in the presence of uniaxial strain is investigated. A feature of p-type systems is the structure of the valence band, which consists of two branches of energy dispersion- light and heavy holes. It is shown that this feature leads to significant splitting of the subbands of symmetric and antisymmetric states, as a result of which it is difficult to form states of the DQW with a vanishingly small tunneling gap; a uniaxial strain, by lifting the degeneracy of the band, suppresses this property, so that the two ground subbands of the size quantization of the DQW remain degenerate to high energies.