Local structure of In_(0.5)Ga_(0.5)As from joint high-resolution and differential pair distribution function analysis

Details Local structure of In_(0.5)Ga_(0.5)As from joint high-resolution and differential pair distribution function analysis Local structure of In_(0.5)Ga_(0.5)As from joint high-resolution and differential pair distribution function analysis

1999-11-18

arxiv.org/abs/cond-mat/9911293v1

Physics

Condensed Matter

Materials Science

9 pages, 7 figure

Scientific paper

10.1063/1.373718

High resolution total and indium differential atomic pair distribution functions (PDFs) for In_(0.5)Ga_(0.5)As alloys have been obtained by high energy and anomalous x-ray diffraction experiments, respectively. The first peak in the total PDF is resolved as a doublet due to the presence of two distinct bond lengths, In-As and Ga-As. The In differential PDF, which involves only atomic pairs containing In, yields chemical specific information and helps ease the structure data interpretation. Both PDFs have been fit with structure models and the way in that the underlying cubic zinc-blende lattice of In_(0.5)Ga_(0.5)As semiconductor alloy distorts locally to accommodate the distinct In-As and Ga-As bond lengths present has been quantified.

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