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Tuning optical properties of complex oxides: examples of 12CaO.7Al2O3 mayenite and LaCrO3 perovskite
Author(s): Peter V. Sushko
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Paper Abstract

Optical absorption bands in two complex oxides are characterised using ab initio simulations and an embedded cluster method. In sub-nanoporous 12CaO.7Al2O3 the width of the optical gap can be controlled by modifying the chemical identities and relative concentration of extra-framework species. In antiferromagnetic LaCrO3, Cr 3d states split into four narrow one-electron bands and give rise to several types of the optical transitions. Their excitation energies respond differently to lattice strain, thus, providing a possibility for tuning the excitation energies in supported LaCrO3 films by selecting appropriate substrates.

Paper Details

Date Published: 29 February 2012
PDF: 11 pages
Proc. SPIE 8263, Oxide-based Materials and Devices III, 826310 (29 February 2012); doi: 10.1117/12.912844
Show Author Affiliations
Peter V. Sushko, Univ. College London (United Kingdom)

Published in SPIE Proceedings Vol. 8263:
Oxide-based Materials and Devices III
Ferechteh H. Teherani; David C. Look; David J. Rogers, Editor(s)

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