Excitonic Mott transition in type-II quantum dots.

Bansal, Bhavtosh and Hayne, Manus and Geller, Martin and Bimberg, Dieter and Moshchalkov, Victor (2008) Excitonic Mott transition in type-II quantum dots. Physical review B, 77: 241304(R). ISSN 1098-0121

Abstract

Photoluminescence spectra measured on a type-II GaSb/GaAs quantum dot ensemble at high excitation power indicate a Mott transition from the low density state comprising of spatially indirect excitons to a high density electron-plasma state. Under the influence of a very high magnetic field, the electron-plasma that is formed at high excitation powers is transformed into magneto-excitons.