| 题名 | Origin of a Topotactic Reduction Effect for Superconductivity in Infinite-Layer Nickelates |
| 作者 | |
| 通讯作者 | Zeng, Shengwei; Tang, Chi Sin; Ariando, A.; Liu, Huajun |
| 发表日期 | 2024-08-09
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| DOI | |
| 发表期刊 | |
| ISSN | 0031-9007
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| EISSN | 1079-7114
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| 卷号 | 133 |
| 摘要 | Topotactic reduction utilizing metal hydrides as reagents has emerged as an effective approach to achieve exceptionally low oxidization states of metal ions and unconventional coordination networks. This method opens avenues to the development of entirely new functional materials, with one notable example being the infinite-layer nickelate superconductors. However, the reduction effect on the atomic reconstruction and electronic structures - crucial for superconductivity - remains largely unresolved. We designed two sets of control Nd0.8Sr0.2NiO2 thin films and used secondary ion mass spectroscopy to highlight the absence of reduction-induced hydrogen intercalation. X-ray absorption spectroscopy revealed a significant linear dichroism with dominant Ni 3dx2-y2 orbitals on superconducting samples, indicating a Ni single-band nature of infinite-layer nickelates. Consistent with the superconducting Tc, the Ni 3d orbitals asymmetry manifests a domelike dependence on the reduction duration. Our results unveil the critical role of reduction in modulating the Ni-3d orbital polarization and its impact on the superconducting properties. © 2024 American Physical Society. |
| 收录类别 | |
| 语种 | 英语
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| 学校署名 | 其他
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| 资助项目 | S.W.Z., Z.S.L., and H.J.L. acknowledge the RIE2025 MTC Individual Research Grants (M22K2c0084), National Research Foundation Competitive Research Program (NRF-CRP28-2022-0002), Career Development Fund (C210812020) and Central Research Fund from the Agency for Science, Technology and Research (A*STAR) for the funding support. The work at NUS and the authors are supported by the Ministry of Education (MOE), Singapore, under its Tier-2 Academic Research Fund (AcRF) (Grants No. MOE-T2EP50121-0018 and No. MOE T2EP50123-0013), the National Research Foundation (NRF) of Singapore under its NRF-ISF joint program (Grant No. NRF2020-NRF-ISF004-3518), and the SUSTech-NUS Joint Research Program. X.R.W. acknowledges support from Singapore Ministry of Education under its Academic Research Fund (AcRF) Tier 2 (Grant No. MOE-T2EP50120-0006) and Tier 1 (Grant No. RG82/23). X.M.Y. acknowledges financial support by National Natural Science Foundation of China (Grant No. 12374378). C.S.T acknowledges the support from the NUS Emerging Scientist Fellowship. The authors would like to acknowledge the Singapore Synchrotron Light Source for providing the facility necessary for conducting the research. The Laboratory is a National Research Infrastructure under the National Research Foundation, Singapore. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not reflect the views of National Research Foundation, Singapore.S.\u2009W.\u2009Z., Z.\u2009S.\u2009L., and H.\u2009J.\u2009L. acknowledge the RIE2025 MTC Individual Research Grants (M22K2c0084), National Research Foundation Competitive Research Program (NRF-CRP28-2022-0002), Career Development Fund (C210812020) and Central Research Fund from the Agency for Science, Technology and Research (A*STAR) for the funding support. The work at NUS and the authors are supported by the Ministry of Education (MOE), Singapore, under its Tier-2 Academic Research Fund (AcRF) (Grants No. MOE-T2EP50121-0018 and No. MOE T2EP50123-0013), the National Research Foundation (NRF) of Singapore under its NRF-ISF joint program (Grant No. NRF2020-NRF-ISF004-3518), and the SUSTech-NUS Joint Research Program. X.\u2009R.\u2009W. acknowledges support from Singapore Ministry of Education under its Academic Research Fund (AcRF) Tier 2 (Grant No. MOE-T2EP50120-0006) and Tier 1 (Grant No. RG82/23). X.\u2009M.\u2009Y. acknowledges financial support by National Natural Science Foundation of China (Grant No. 12374378). C.\u2009S.\u2009T acknowledges the support from the NUS Emerging Scientist Fellowship. The authors would like to acknowledge the Singapore Synchrotron Light Source for providing the facility necessary for conducting the research. The Laboratory is a National Research Infrastructure under the National Research Foundation, Singapore. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not reflect the views of National Research Foundation, Singapore.
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| 出版者 | |
| EI入藏号 | 20243316871991
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| EI主题词 | Dichroism
; Electronic structure
; Functional materials
; Hydrides
; Metal ions
; Nickel
; Nickel compounds
; Secondary ion mass spectrometry
; Strontium compounds
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| EI分类号 | Metallurgy:531.1
; Nickel:548.1
; Light/Optics:741.1
; Inorganic Compounds:804.2
; Atomic and Molecular Physics:931.3
; Materials Science:951
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| ESI学科分类 | PHYSICS
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| 来源库 | EV Compendex
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| 引用统计 |
被引频次[WOS]：7
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| 成果类型 | 期刊论文 |
| 条目标识符 | http://sustech.caswiz.com/handle/2SGJ60CL/807061 |
| 专题 | 工学院_材料科学与工程系 南方科技大学 |
| 作者单位 | 1.Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore; 138634, Singapore 2.Department of Physics, Faculty of Science, National University of Singapore, Singapore; 117551, Singapore 3.Singapore Synchrotron Light Source (SSLS), National University of Singapore, 5 Research Link, Singapore; 117603, Singapore 4.Shanghai Key Laboratory of High Temperature Superconductors, Physics Department, Shanghai University, Shanghai; 200444, China 5.Department of Materials Science and Engineering, Southern University of Science and Technology, Guangdong, Shenzhen; 518055, China 6.School of Physical and Mathematical Sciences, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore; 639798, Singapore 7.Department of Materials Science and Engineering, National University of Singapore, Singapore; 117575, Singapore |
| 推荐引用方式 GB/T 7714 |
Zeng, Shengwei,Tang, Chi Sin,Luo, Zhaoyang,et al. Origin of a Topotactic Reduction Effect for Superconductivity in Infinite-Layer Nickelates[J]. Physical Review Letters,2024,133.
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| APA |
Zeng, Shengwei.,Tang, Chi Sin.,Luo, Zhaoyang.,Chow, Lin Er.,Lim, Zhi Shiuh.,...&Liu, Huajun.(2024).Origin of a Topotactic Reduction Effect for Superconductivity in Infinite-Layer Nickelates.Physical Review Letters,133.
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| MLA |
Zeng, Shengwei,et al."Origin of a Topotactic Reduction Effect for Superconductivity in Infinite-Layer Nickelates".Physical Review Letters 133(2024).
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| 条目包含的文件 | 条目无相关文件。 | |||||
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