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Special Issue:
SPECIAL TOPIC — Stephen J. Pennycook: A research life in atomic-resolution STEM and EELS
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| SPECIAL TOPIC — Stephen J. Pennycook: A research life in atomic-resolution STEM and EELS |
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Visualizing extended defects at the atomic level in a Bi2Sr2CaCu2O8+δ superconducting wire |
| Kejun Hu(胡柯钧), Shuai Wang(王帅), Boyu Li(李泊玉), Ying Liu(刘影)†, Binghui Ge(葛炳辉), and Dongsheng Song(宋东升)‡ |
| Information Materials and Intelligent Sensing Laboratory of Anhui Province, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China |
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Abstract The microstructure significantly influences the superconducting properties. Herein, the defect structures and atomic arrangements in high-temperature Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta }$ (Bi-2212) superconducting wire are directly characterized via state-of-the-art scanning transmission electron microscopy. Interstitial oxygen atoms are observed in both the charge reservoir layers and grain boundaries in the doped superconductor. Inclusion phases with varied numbers of CuO$_{2}$ layers are found, and twist interfaces with different angles are identified. This study provides insights into the structures of Bi-2212 wire and lays the groundwork for guiding the design of microstructures and optimizing the production methods to enhance superconducting performance.
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Received: 03 June 2024
Revised: 06 August 2024
Accepted manuscript online: 08 August 2024
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PACS:
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61.05.-a
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(Techniques for structure determination)
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61.72.-y
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(Defects and impurities in crystals; microstructure)
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74.62.Dh
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(Effects of crystal defects, doping and substitution)
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84.71.Mn
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(Superconducting wires, fibers, and tapes)
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Corresponding Authors:
Ying Liu, Dongsheng Song
E-mail: liuying.hube@outlook.com;dsong@ahu.eud.cn
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Cite this article:
Kejun Hu(胡柯钧), Shuai Wang(王帅), Boyu Li(李泊玉), Ying Liu(刘影), Binghui Ge(葛炳辉), and Dongsheng Song(宋东升) Visualizing extended defects at the atomic level in a Bi2Sr2CaCu2O8+δ superconducting wire 2024 Chin. Phys. B 33 096101
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