Academic Journal
Electronic Character of Charge Order in Square-Planar Low-Valence Nickelates
| العنوان: | Electronic Character of Charge Order in Square-Planar Low-Valence Nickelates |
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| المؤلفون: | Y. Shen, J. Sears, G. Fabbris, J. Li, J. Pelliciari, M. Mitrano, W. He, Junjie Zhang, J. F. Mitchell, V. Bisogni, M. R. Norman, S. Johnston, M. P. M. Dean |
| المصدر: | Physical Review X, Vol 13, Iss 1, p 011021 (2023) |
| بيانات النشر: | American Physical Society |
| سنة النشر: | 2023 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | Physics, QC1-999 |
| الوصف: | Charge order is a central feature of the physics of cuprate superconductors and is known to arise from a modulation of holes with primarily oxygen character. Low-valence nickelate superconductors also host charge order, but the electronic character of this symmetry breaking is unsettled. Here, using resonant inelastic x-ray scattering at the Ni L_{2} edge, we identify intertwined involvements of Ni 3d_{x^{2}-y^{2}}, 3d_{3z^{2}-r^{2}}, and O 2p_{σ} orbitals in the formation of diagonal charge order in an overdoped low-valence nickelate La_{4}Ni_{3}O_{8}. The Ni 3d_{x^{2}-y^{2}} orbitals, strongly hybridized with planar O 2p_{σ}, largely shape the spatial charge distribution and lead to Ni site-centered charge order. The 3d_{3z^{2}-r^{2}} orbitals play a small, but non-negligible role in the charge order as they hybridize with the rare-earth 5d orbitals. Our results reveal that the low-energy physics and ground-state character of these nickelates are more complex than those in cuprates. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 2160-3308 |
| Relation: | http://doi.org/10.1103/PhysRevX.13.011021; https://doaj.org/toc/2160-3308; https://doaj.org/article/1f46d6b8d92445beaa20cdcc2063db9d |
| DOI: | 10.1103/PhysRevX.13.011021 |
| الاتاحة: | https://doi.org/10.1103/PhysRevX.13.011021 https://doaj.org/article/1f46d6b8d92445beaa20cdcc2063db9d |
| رقم الانضمام: | edsbas.4CA2AFE5 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 21603308 |
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| DOI: | 10.1103/PhysRevX.13.011021 |