Abstract
We report the first experimental evidence for the indirect fundamental band gap developed when an in-plane magnetic field is applied to a modulation-doped quantum well. The observed photoluminescence peak for the lowest subband undergoes a large, approximately quadratic shift with field, a consequence of the behavior of the allowed transitions in the increasingly indirect-gap band-structure. A good theoretical fit is obtained by calculating the transition energies using a realistic self-consistent Hartree potential for the quantum-well profile.
Publication Details
This article was originally published as: Whittaker, DM, Fisher, TA, Simmonds, PE, et al, Magnetic-field-induced indirect gap in a modulation-doped quantum well, Physical Review Letters, 1991, 67(7), 887-890. Copyright 1991 American Physical Society. The original journal can be found here.