Carrier localization in perovskite nickelates from oxygen vacancies
Point defects, such as oxygen vacancies, control the physical properties of complex oxides, relevant in active areas of research from superconductivity to resistive memory to catalysis. In most oxide semiconductors, electrons that are associated with oxygen vacancies occupy the conduction band, lead...
| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
National Academy of Sciences
2020
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| Online Access: | https://hdl.handle.net/1721.1/127812 |
| _version_ | 1826190796435488768 |
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| author | Kotiuga, Michele Zhang, Zhen Li, Jiarui Rodolakis, Fanny Zhou, Hua Sutarto, Ronny He, Feizhou Wang, Qi Sun, Yifei Wang, Ying Aghamiri, Neda Alsadat Hancock, Steven Bennett Rokhinson, Leonid P Landau, David P Abate, Yohannes Freeland, John W Comin, Riccardo Ramanathan, Shriram Rabe, Karin M |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Kotiuga, Michele Zhang, Zhen Li, Jiarui Rodolakis, Fanny Zhou, Hua Sutarto, Ronny He, Feizhou Wang, Qi Sun, Yifei Wang, Ying Aghamiri, Neda Alsadat Hancock, Steven Bennett Rokhinson, Leonid P Landau, David P Abate, Yohannes Freeland, John W Comin, Riccardo Ramanathan, Shriram Rabe, Karin M |
| author_sort | Kotiuga, Michele |
| collection | MIT |
| description | Point defects, such as oxygen vacancies, control the physical properties of complex oxides, relevant in active areas of research from superconductivity to resistive memory to catalysis. In most oxide semiconductors, electrons that are associated with oxygen vacancies occupy the conduction band, leading to an increase in the electrical conductivity. Here we demonstrate, in contrast, that in the correlatedelectron perovskite rare-earth nickelates, RNiO3 (R is a rare-earth element such as Sm or Nd), electrons associated with oxygen vacancies strongly localize, leading to a dramatic decrease in the electrical conductivity by several orders of magnitude. This unusual behavior is found to stem from the combination of crystal field splitting and filling-controlled Mott-Hubbard electron-electron correlations in the Ni 3d orbitals. Furthermore, we show the distribution of oxygen vacancies in NdNiO3 can be controlled via an electric field, leading to analog resistance switching behavior. This study demonstrates the potential of nickelates as testbeds to better understand emergent physics in oxide heterostructures as well as candidate systems in the emerging fields of artificial intelligence. |
| first_indexed | 2024-09-23T08:45:49Z |
| format | Article |
| id | mit-1721.1/127812 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:45:49Z |
| publishDate | 2020 |
| publisher | National Academy of Sciences |
| record_format | dspace |
| spelling | mit-1721.1/1278122022-09-23T14:23:22Z Carrier localization in perovskite nickelates from oxygen vacancies Kotiuga, Michele Zhang, Zhen Li, Jiarui Rodolakis, Fanny Zhou, Hua Sutarto, Ronny He, Feizhou Wang, Qi Sun, Yifei Wang, Ying Aghamiri, Neda Alsadat Hancock, Steven Bennett Rokhinson, Leonid P Landau, David P Abate, Yohannes Freeland, John W Comin, Riccardo Ramanathan, Shriram Rabe, Karin M Massachusetts Institute of Technology. Department of Physics Point defects, such as oxygen vacancies, control the physical properties of complex oxides, relevant in active areas of research from superconductivity to resistive memory to catalysis. In most oxide semiconductors, electrons that are associated with oxygen vacancies occupy the conduction band, leading to an increase in the electrical conductivity. Here we demonstrate, in contrast, that in the correlatedelectron perovskite rare-earth nickelates, RNiO3 (R is a rare-earth element such as Sm or Nd), electrons associated with oxygen vacancies strongly localize, leading to a dramatic decrease in the electrical conductivity by several orders of magnitude. This unusual behavior is found to stem from the combination of crystal field splitting and filling-controlled Mott-Hubbard electron-electron correlations in the Ni 3d orbitals. Furthermore, we show the distribution of oxygen vacancies in NdNiO3 can be controlled via an electric field, leading to analog resistance switching behavior. This study demonstrates the potential of nickelates as testbeds to better understand emergent physics in oxide heterostructures as well as candidate systems in the emerging fields of artificial intelligence. National Science Foundation (Grant 1751739) 2020-10-05T21:42:26Z 2020-10-05T21:42:26Z 2019-10 2019-06 2020-09-22T18:21:25Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/127812 Kotiuga, Michele et al. "Carrier localization in perovskite nickelates from oxygen vacancies." Proceedings of the National Academy of Sciences 116, 44 (October 2019): 21992-21997 © 2019 National Academy of Sciences en https://dx.doi.org/10.1073/PNAS.1910490116 Proceedings of the National Academy of Sciences Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf National Academy of Sciences PNAS |
| spellingShingle | Kotiuga, Michele Zhang, Zhen Li, Jiarui Rodolakis, Fanny Zhou, Hua Sutarto, Ronny He, Feizhou Wang, Qi Sun, Yifei Wang, Ying Aghamiri, Neda Alsadat Hancock, Steven Bennett Rokhinson, Leonid P Landau, David P Abate, Yohannes Freeland, John W Comin, Riccardo Ramanathan, Shriram Rabe, Karin M Carrier localization in perovskite nickelates from oxygen vacancies |
| title | Carrier localization in perovskite nickelates from oxygen vacancies |
| title_full | Carrier localization in perovskite nickelates from oxygen vacancies |
| title_fullStr | Carrier localization in perovskite nickelates from oxygen vacancies |
| title_full_unstemmed | Carrier localization in perovskite nickelates from oxygen vacancies |
| title_short | Carrier localization in perovskite nickelates from oxygen vacancies |
| title_sort | carrier localization in perovskite nickelates from oxygen vacancies |
| url | https://hdl.handle.net/1721.1/127812 |
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