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Title: Oxygen Vacancy Linear Clustering in a Perovskite Oxide

Journal Article · · Journal of Physical Chemistry Letters
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  1. Sungkyunkwan Univ., Suwon (Republic of Korea). School of Advanced Materials Science and Engineering
  2. Seoul National Univ. (Korea, Republic of). Dept. of Materials Science and Engineering
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source

Oxygen vacancies have been implicitly assumed isolated ones, and understanding oxide materials possibly containing oxygen vacancies remains elusive within the scheme of the isolated vacancies, although the oxygen vacancies have been playing a decisive role in oxide materials. We report the presence of oxygen vacancy linear clusters and their orientation along a specific crystallographic direction in SrTiO3, a representative of a perovskite oxide. The presence of the linear clusters and associated electron localization was revealed by an electronic structure represented in the increase in the Ti2+ valence state or corresponding Ti 3d2 electronic configuration along with divacancy cluster model analysis and transport measurement. The orientation of the linear clusters along the [001] direction in perovskite SrTiO3 was verified by further X-ray diffuse scattering analysis. And because SrTiO3 is an archetypical perovskite oxide, the vacancy linear clustering with the specific aligned direction and electron localization can be extended to a wide variety of the perovskite oxides.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Research Foundation of Korea (NRF); USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1394835
Journal Information:
Journal of Physical Chemistry Letters, Vol. 8, Issue 15; ISSN 1948-7185
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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Oxygen deficiency induced strong electron localization in lanthanum doped transparent perovskite oxide BaSn O 3 journal October 2019
Optical Anisotropy of SrTiO 3 (110) for Different Surface Terminations journal December 2017
Surface-induced thickness limit of conducting La-doped SrTiO 3 thin films journal October 2019
Erasable and recreatable two-dimensional electron gas at the heterointerface of SrTiO 3 and a water-dissolvable overlayer journal August 2019
Self-reduction of the native TiO2 (110) surface during cooling after thermal annealing – in-operando investigations journal August 2019
Ba-addition induced enhanced surface reducibility of SrTiO 3 : implications on catalytic aspects journal January 2019
Metallicity in SrTiO 3 substrates induced by pulsed laser deposition journal January 2019
Elucidating the origin of magnetic ordering in ferroelectric BaTiO 3- d thin film via electronic structure modification journal March 2019
Mechanisms of Oxygen Vacancy Aggregation in SiO2 and HfO2 journal March 2019
A quantum-mechanical investigation of oxygen vacancies and copper doping in the orthorhombic CaSnO 3 perovskite journal January 2018
A bottom-up process of self-formation of highly conductive titanium oxide (TiO) nanowires on reduced SrTiO 3 journal January 2019
Photocatalysis with Reduced TiO 2 : From Black TiO 2 to Cocatalyst-Free Hydrogen Production journal November 2018
Facile and noninvasive passivation, doping and chemical tuning of macroscopic hybrid perovskite crystals journal March 2020