Novel self-assembled quantum dots in the GaSb/AlAs heterosystem
T. S. Shamirzaev, D. S. Abramkin, A. K. Gutakovskii, M. A. Putyato
Rzhanov Institute of Semiconductor Physics, Siberian Branch of RAS, 630090 Novosibirsk, Russia
Abstract
Novel self-assembled quantum dots (QDs) in the GaSb/AlAs
heterosystem were obtained and studied by means of transmission
electron microscopy, steady-state and transient photoluminescence. A
strong intermixing of both III and V group materials results in the
fabrication of quaternary alloy QDs in the AlAs matrix. The QDs have
atypical energy structure: band alignment of type I with the lowest
electronic state at the indirect X minimum of the conduction band.