Journal
ULTRAMICROSCOPY
Volume 184, Issue -, Pages 217-224Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultramic.2017.09.006
Keywords
Dislocations; SrTiO3; Annular bright field (ABF); Aberration corrected transmission electron microscopy; Atomically resolved EDS
Categories
Funding
- Japan Society for the Promotion of Science (JSPS) [25106003, 15H02290]
- Ministry of Education, Culture, Sports, Science and Technology in Japan (MEXT) [12024046]
- National Key R&D Program of China [2016YFA0300804, 2016YFA0300903]
- National Natural Science Foundation of China [51672007, 51502007]
- National Program for Thousand Young Talents of China
- Peking-Tsinghua-IOP Collaborative Innovation Center of Quantum Matter
- Grants-in-Aid for Scientific Research [17H06094] Funding Source: KAKEN
Ask authors/readers for more resources
By using the state-of-the-art microscopy and spectroscopy in aberration-corrected scanning transmission electron microscopes, we determine the atomic arrangements, occupancy, elemental distribution, and the electronic structures of dislocation cores in the 10 degrees tilted SrTiO3 bicrystal. We identify that there are two different types of oxygen deficient dislocation cores, i.e., the SrO plane terminated Sr0.82Ti0.85O3-x (Ti3.67+, 0.48 <= x <= 0.91) and TiO2 plane terminated Sr0.63Ti0.90O3-y (Ti3.60+, 0.57 <= y <= 1). They have the same Burgers vector of a [100] but different atomic arrangements and chemical properties. Besides the oxygen vacancies, Sr vacancies and rocksalt-like titanium oxide reconstruction are also identified in the dislocation core with TiO2 plane termination. Our atomic-scale study reveals the true atomic structures and chemistry of individual dislocation cores, providing useful insights into understanding the properties of dislocations and grain boundaries. (C) 2017 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available