Abstract
We calculate the binding energies of and donor states bound to X valleys in type-II GaAs-AlAs quantum well structures using an anisotropic variational method that enables us to take into account the effective-mass anisotropy and the quantum confinement. These binding energies present a strong dependence on the effective mass and the valley symmetry. Intradonor transitions energies are shown to be up to 1000 which is well above the energies usually observed for donors in type-I quantum structures.
- Received 13 April 1998
DOI:https://doi.org/10.1103/PhysRevB.58.7829
©1998 American Physical Society