Strong Superexchange in a d9−δ Nickelate Revealed by Resonant Inelastic X-Ray Scattering
| العنوان: | Strong Superexchange in a d9−δ Nickelate Revealed by Resonant Inelastic X-Ray Scattering |
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| المؤلفون: | Jiatai Feng, John F. Mitchell, Y. Shen, Ignace Jarrige, M. Garcia-Fernandez, Antia S. Botana, P. Villar Arribi, Ke-Jin Zhou, Jiaqi Lin, Mark Dean, A. C. Walters, Valentina Bisogni, G. Fabbris, Hu Miao, S. G. Chiuzbaian, Jonathan Pelliciari, Derek Meyers, Abhishek Nag, Junjie Zhang, Xiaopei Liu, M. R. Norman, John W. Freeland, D. G. Mazzone |
| المصدر: | Physical Review Letters. 126 |
| بيانات النشر: | American Physical Society (APS), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Physics, Superconductivity, Condensed matter physics, Magnon, General Physics and Astronomy, 01 natural sciences, Computer Science::Other, Magnetic exchange, Resonant inelastic X-ray scattering, Condensed Matter::Materials Science, Superexchange, Condensed Matter::Superconductivity, 0103 physical sciences, Condensed Matter::Strongly Correlated Electrons, Cuprate, 010306 general physics, Spectroscopy |
| الوصف: | The discovery of superconductivity in a d(9-delta) nickelate has inspired disparate theoretical perspectives regarding the essential physics of this class of materials. A key issue is the magnitude of the magnetic superexchange, which relates to whether cuprate-like high-temperature nickelate superconductivity could be realized. We address this question using Ni L-edge and O K-edge spectroscopy of the reduced d(9-1/3) trilayer nickelates R4Ni3O8 (where R = La, Pr) and associated theoretical modeling. A magnon energy scale of similar to 80 meV resulting from a nearest-neighbor magnetic exchange of J = 69(4) meV is observed, proving that d(9-delta) nickelates can host a large superexchange. This value, along with that of the Ni-O hybridization estimated from our O K-edge data, implies that trilayer nickelates represent an intermediate case between the infinite-layer nickelates and the cuprates. Layered nickelates thus provide a route to testing the relevance of superexchange to nickelate superconductivity. |
| تدمد: | 1079-7114 0031-9007 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::8d8360e060fdfb9ea6cf4bf26037de21Test https://doi.org/10.1103/physrevlett.126.087001Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi...........8d8360e060fdfb9ea6cf4bf26037de21 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10797114 00319007 |
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