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Title: Atomic-scale structure of Ga1-xInxP alloys measured with extended x-ray absorption fine structure spectroscopy.
Authors: Schnohr, CS
Araujo, LL
Kluth, P
Sprouster, DJ
Foran, GJ
Ridgway, MC
Keywords: Fine Structure
Gallium
Spectroscopy
Solar Cells
Alloys
Crystals
Issue Date: Sep-2008
Publisher: American Physical Society
Citation: Schnohr, C. S., Araujo, L. L., Kluth, P., Sprouster, D. J., Foran, G. J., & Ridgway, M. C. (2008). Atomic-scale structure of Ga1-xInxP alloys measured with extended x-ray absorption fine structure spectroscopy. Physical Review B, 78(11), 8.
Abstract: Extended x-ray absorption fine structure spectroscopy was used to measure the interatomic distance distributions of the first three nearest-neighbor (NN) shells around Ga and In atoms in Ga1-xInxP. The first NN shell has a composition-dependent bimodal distance distribution with a relaxation parameter of epsilon= 0.80 +/-0.04 similar to other III-V ternary alloys. The second NN shell distance distribution remains multimodal, corresponding to the three different cation-cation pairs but is closer to the virtual-crystal approximation (VCA). The third NN shell mean distance is well approximated by the VCA although the distribution is significantly broadened. Predictive model calculations are discussed in detail where good agreement with experimental results is found. Like in Ga1-xInxAs, lattice mismatch is accommodated in Ga1-xInxP by both bond-length and bond-angle relaxations although primarily via the latter. © 2008, American Physical Society
URI: http://dx.doi.org/10.1103/PhysRevB.78.115201
http://apo.ansto.gov.au/dspace/handle/10238/1710
ISSN: 1098-0121
Appears in Collections:Journal Articles

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