The spin state of holes bound to Mn acceptors in GaMnAs is investigated by optical spectroscopy. Concentrations of Mn from 10^17 to 10^19 cm^-3 were studied as a function of magnetic field and temperature. The photoluminescence from recombination of electrons with holes bound in the Mn-acceptor complex (MAC) displays multiple spectral peaks. The circular polarization rho of these peaks increases with increasing magnetic field and saturates at rho ~= 1/3. This value of polarization is expected from modeling the addition of spin angular momentum and interband optical transition matrix elements.
@article{arxiv.cond-mat/0405692,
title = {Optical Spectroscopy of the Hole Spin in GaMnAs Acceptors},
author = {B. Lakshmi and G. Favrot and D. Heiman},
journal= {arXiv preprint arXiv:cond-mat/0405692},
year = {2007}
}
Comments
11 Pages, 6 Figures, Latex with spie.cls and spiebib.bst. Paper #5359-46 presented Wednesday, Jan 28, 2004, at the SPIE Photonics West Conference in San Jose, CA