Abstract
We study an exciton in a type-II quantum dot, where the electron is confined in the dot, but the hole is located in the barrier material. The exciton properties are studied as a function of a perpendicular magnetic field using a Hartree-Fock mesh calculation. Our model system consists of a planar quantum disk. Angular momentum (l) transitions are predicted with increasing magnetic field. We also study the transition from a type-I to a type-II quantum dot which is induced by changing the confinement potential of the hole. For sufficiently large magnetic fields a reentrant behavior is found from to and back to which results in a transition from type II to type I.
- Received 20 March 2001
DOI:https://doi.org/10.1103/PhysRevB.64.155324
©2001 American Physical Society