Abstract
The effects of both electric and magnetic fields on the transition energies between the 1s-like ground state and 2 excited states of hydrogenic donors in a GaAs-As quantum well are studied. The effective-mass approximation within a variational scheme is adopted with electric and magnetic fields considered in the growth direction of the heterostructure, and treated directly in the variational calculation. Results for the finite-barrier potential are obtained as functions of both applied fields and for different GaAs-As quantum-well thicknesses, and compared with available infrared magnetospectroscopy measurements on donor-doped quantum wells. Theoretical results indicate that a detailed study of the intradonor absorption spectra together with a proper consideration of the impurity-doping profile are necessary for a qualitative understanding of the experimental results.
- Received 2 August 1994
DOI:https://doi.org/10.1103/PhysRevB.51.2259
©1995 American Physical Society