Wide bandgap tunability in complex transition metal oxides by site-specific substitution
Top Cited Papers
- 1 January 2012
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Communications
- Vol. 3 (1), 689
- https://doi.org/10.1038/ncomms1690
Abstract
Fabricating complex transition metal oxides with a tunable bandgap without compromising their intriguing physical properties is a longstanding challenge. Here we examine the layered ferroelectric bismuth titanate and demonstrate that, by site-specific substitution with the Mott insulator lanthanum cobaltite, its bandgap can be narrowed by as much as 1 eV, while remaining strongly ferroelectric. We find that when a specific site in the host material is preferentially substituted, a split-off state responsible for the bandgap reduction is created just below the conduction band of bismuth titanate. This provides a route for controlling the bandgap in complex oxides for use in emerging oxide optoelectronic and energy applications.This publication has 33 references indexed in Scilit:
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