Optical Spectroscopy of the Hole Spin in GaMnAs Acceptors

2004/05/29 by B. Lakshmi, G. Favrot, D. Heiman
Physics and Astronomy · #cond-mat.mtrl-sci

paper · pdf

published as Proceedings of SPIE, Vol. #5359 (2004) · 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

arxiv created 2004/05/29 · arxiv updated 2009/12/01

Abstract

The spin state of holes bound to Mn acceptors in GaMnAs is investigated by optical spectroscopy. Concentrations of Mn from 10¹7 to 10¹9 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.

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