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Current Applied Physics, Vol.4, No.5, 415-418, 2004
Optical transitions of liquid phase epitaxy grown (Ga,Mn)As in magnetic fields
Low temperature (4.0 K) photoluminescence measurements of liquid phase epitaxy grown (Ga,Mn)As epilayers show distinctive donor-acceptor pair transitions. Below 0.3% Mn molar fractions, only one broad transition and its phonon echo were observed. However, exceeding 0.3%, three peaks at 1.409, 1.408 and 1.400 eV labeled as H, M and L, respectively, of acceptor related transitions were observed along with their phonon echoes. In the presence of magnetic field, the transitions are highly polarized to sigma(+) polarization and H peak shows free-carrier-like transition behavior whereas M and L peaks exhibit conventional donor-acceptor bound exciton transitions. (C) 2003 Elsevier B.V. All rights reserved.