Journal
JOURNAL OF APPLIED PHYSICS
Volume 109, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3525586
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Funding
- STCSM [08XD14047, 09JC1415600, 08ZR1421800]
- NSFC of China [10927404, 60723001]
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Temperature-dependent photoluminescence (PL) measurements are carried out on lattice-matched and compressively strained GaxIn1-xP/(Al0.66Ga0.(34))(y)In1-yP quantum wells (QWs) with CuPt-type long-range (LR) ordering. Experimental data show that compressive strain and substrate misorientation of the QWs affect the degree of LR ordering. The compressive strain competes with the misorientation of 6 off toward [111](A) (denoted as 6 degrees A) significantly. It not only affects the distribution of domains with different degree of LR ordering in the x-y plane but also introduces fluctuation of the degree of LR ordering along the z direction of the QWs, which in turn causes the splitting of PL peaks. A phenomenological model is proposed to account for the experimental phenomena based on the principle of minimum total free energy. The results suggest that 6 degrees A misorientation should not be preferable for compressively strained GaxIn1-xP QWs with LR ordering. (C) 2011 American Institute of Physics. [doi:10.1063/1.3525586]
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