1. Optical absorption and disorder in delafossites
- Author
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Tess R. Senty, Jonathan W. Lekse, Hong Wang, Barry Haycock, Alan D. Bristow, Christopher Matranga, James P. Lewis, and Gihan Panapitiya
- Subjects
010302 applied physics ,Materials science ,Physics and Astronomy (miscellaneous) ,Condensed matter physics ,business.industry ,Band gap ,Oxide ,Infrared spectroscopy ,02 engineering and technology ,Crystal structure ,021001 nanoscience & nanotechnology ,01 natural sciences ,Global strain ,chemistry.chemical_compound ,Absorption edge ,chemistry ,Atomic electron transition ,0103 physical sciences ,Optoelectronics ,0210 nano-technology ,business ,Absorption (electromagnetic radiation) - Abstract
We present compelling experimental results of the optical characteristics of transparent oxide CuGaO2 and related CuGa1-xFexO2 (with 0.00≤x≤0.05) alloys, whereby the forbidden electronic transitions for CuGaO2 become permissible in the presence of B-site (Ga sites) alloying with Fe. Our computational structural results imply a correlation between the global strain on the system and a decreased optical absorption edge. However, herein, we show that the relatively ordered CuGa1-xFexO2 (for 0.00≤x≤0.04) structures exhibit much weaker vis-absorption compared to the relatively disordered CuGa0.95Fe0.05O2.
- Published
- 2017