Resolving the electronic ground state of La3Ni2O7-δ films
Abstract The recent discovery of a superconductivity signature in La3Ni2O7-δ under a pressure of 14 GPa, with a superconducting transition temperature of around 80 K, has attracted considerable attention. An important aspect of investigating electronic structures is discerning the extent to which th...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-02-01
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| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-025-01971-z |
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| _version_ | 1823861974871572480 |
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| author | Xiaolin Ren Ronny Sutarto Xianxin Wu Jianfeng Zhang Hai Huang Tao Xiang Jiangping Hu Riccardo Comin Xingjiang Zhou Zhihai Zhu |
| author_facet | Xiaolin Ren Ronny Sutarto Xianxin Wu Jianfeng Zhang Hai Huang Tao Xiang Jiangping Hu Riccardo Comin Xingjiang Zhou Zhihai Zhu |
| author_sort | Xiaolin Ren |
| collection | DOAJ |
| description | Abstract The recent discovery of a superconductivity signature in La3Ni2O7-δ under a pressure of 14 GPa, with a superconducting transition temperature of around 80 K, has attracted considerable attention. An important aspect of investigating electronic structures is discerning the extent to which the electronic ground state of La3Ni2O7-δ resembles the parent state of the cuprate superconductor, a charge transfer insulator with long-range antiferromagnetism. Through X-ray absorption spectroscopy, we reveal the influence of oxygen ligands on the electronic ground states of the Ni ions, displaying a charge transfer nature akin to cuprate but with distinct orbital configurations. Additionally, in La3Ni2O7-δ films, we detect a superlattice reflection (1/4, 1/4, L) at the Ni L absorption edge using resonant X-ray scattering measurements. Further examination of the resonance profile indicates that the reflection originates from the Ni d orbitals. By evaluating the reflection’s azimuthal angle dependence, we confirm the presence of collinear antiferromagnetic spin ordering and charge-like anisotropy ordered with the same periodicity. Our findings reveal a microscopic relationship between these two components in the temperature dependence of the scattering intensity of the reflection. This investigation enriches our understanding of high-temperature superconductivity in La3Ni2O7-δ under high pressure. |
| format | Article |
| id | doaj-art-7e54100a93904e45af79d6a0013dec8b |
| institution | Kabale University |
| issn | 2399-3650 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Physics |
| spelling | doaj-art-7e54100a93904e45af79d6a0013dec8b2025-02-09T12:40:36ZengNature PortfolioCommunications Physics2399-36502025-02-01811710.1038/s42005-025-01971-zResolving the electronic ground state of La3Ni2O7-δ filmsXiaolin Ren0Ronny Sutarto1Xianxin Wu2Jianfeng Zhang3Hai Huang4Tao Xiang5Jiangping Hu6Riccardo Comin7Xingjiang Zhou8Zhihai Zhu9Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesCanadian Light SourceCAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of SciencesBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesDepartment of Materials Science, Fudan UniversityBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesDepartment of Physics, Massachusetts Institute of TechnologyBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesAbstract The recent discovery of a superconductivity signature in La3Ni2O7-δ under a pressure of 14 GPa, with a superconducting transition temperature of around 80 K, has attracted considerable attention. An important aspect of investigating electronic structures is discerning the extent to which the electronic ground state of La3Ni2O7-δ resembles the parent state of the cuprate superconductor, a charge transfer insulator with long-range antiferromagnetism. Through X-ray absorption spectroscopy, we reveal the influence of oxygen ligands on the electronic ground states of the Ni ions, displaying a charge transfer nature akin to cuprate but with distinct orbital configurations. Additionally, in La3Ni2O7-δ films, we detect a superlattice reflection (1/4, 1/4, L) at the Ni L absorption edge using resonant X-ray scattering measurements. Further examination of the resonance profile indicates that the reflection originates from the Ni d orbitals. By evaluating the reflection’s azimuthal angle dependence, we confirm the presence of collinear antiferromagnetic spin ordering and charge-like anisotropy ordered with the same periodicity. Our findings reveal a microscopic relationship between these two components in the temperature dependence of the scattering intensity of the reflection. This investigation enriches our understanding of high-temperature superconductivity in La3Ni2O7-δ under high pressure.https://doi.org/10.1038/s42005-025-01971-z |
| spellingShingle | Xiaolin Ren Ronny Sutarto Xianxin Wu Jianfeng Zhang Hai Huang Tao Xiang Jiangping Hu Riccardo Comin Xingjiang Zhou Zhihai Zhu Resolving the electronic ground state of La3Ni2O7-δ films Communications Physics |
| title | Resolving the electronic ground state of La3Ni2O7-δ films |
| title_full | Resolving the electronic ground state of La3Ni2O7-δ films |
| title_fullStr | Resolving the electronic ground state of La3Ni2O7-δ films |
| title_full_unstemmed | Resolving the electronic ground state of La3Ni2O7-δ films |
| title_short | Resolving the electronic ground state of La3Ni2O7-δ films |
| title_sort | resolving the electronic ground state of la3ni2o7 δ films |
| url | https://doi.org/10.1038/s42005-025-01971-z |
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