Metallic line defect in wide-bandgap transparent perovskite BaSnO3
Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC)..
A line defect with metallic characteristics has been found in optically transparent BaSnO3 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 BaSnO3 films.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:7 |
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| Enthalten in: |
Science advances - 7(2021), 3 vom: 12. Jan. |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Yun, Hwanhui [VerfasserIn] |
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Date Revised 06.02.2021 published: Electronic-Print Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1126/sciadv.abd4449 |
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NLM32085017X |
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| 520 | |a A line defect with metallic characteristics has been found in optically transparent BaSnO3 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 BaSnO3 films | ||
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| 700 | 1 | |a Jeong, Jong Seok |e verfasserin |4 aut | |
| 700 | 1 | |a Birol, Turan |e verfasserin |4 aut | |
| 700 | 1 | |a Mkhoyan, K Andre |e verfasserin |4 aut | |
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