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Title: Metallic line defect in wide-bandgap transparent perovskite BaSnO 3
A line defect with metallic characteristics has been found in optically transparent BaSnO 3 perovskite thin films. The distinct atomic structure of the defect core, composed of Sn and O atoms, was visualized by atomic-resolution scanning transmission electron microscopy (STEM). When doped with La, dopants that replace Ba atoms preferentially segregate to specific crystallographic sites adjacent to the line defect. The electronic structure of the line defect probed in STEM with electron energy-loss spectroscopy was supported by ab initio theory, which indicates the presence of Fermi level–crossing electronic bands that originate from defect core atoms. These metallic line defects also act as electron sinks attracting additional negative charges in these wide-bandgap BaSnO 3 films.  more » « less
Award ID(s):
2011401 1420013 1741801
PAR ID:
10217871
Author(s) / Creator(s):
; ; ; ; ; ;
Date Published:
Journal Name:
Science Advances
Volume:
7
Issue:
3
ISSN:
2375-2548
Page Range / eLocation ID:
eabd4449
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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