| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Two Distinct Charge Orders in Infinite-Layer PrNiO$_{2+\delta}$ Revealed by Resonant X-Ray Diffraction |
| Xiaolin Ren1,2, Ronny Sutarto3, Qiang Gao1, Qisi Wang4, Jiarui Li5, Yao Wang6, Tao Xiang1,2,7, Jiangping Hu1,2, J. Chang4, Riccardo Comin5, X. J. Zhou1,2,7,8*, and Zhihai Zhu1,2,8* |
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
3Canadian Light Source, Saskatoon, Saskatchewan S7N 2V3, Canada
4Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
5Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
6Department of Physics and Astronomy, Clemson University, Clemson, SC 29631, USA
7Beijing Academy of Quantum Information Sciences, Beijing 100193, China
8Songshan Lake Materials Laboratory, Dongguan 523808, China
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| Cite this article: |
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Xiaolin Ren, Ronny Sutarto, Qiang Gao et al 2024 Chin. Phys. Lett. 41 117404 |
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Abstract Research of infinite-layer nickelates has unveiled a broken translation symmetry, which has sparked significant interest in its root, its relationship to superconductivity, and its comparison to charge order in cuprates. In this study, resonant x-ray scattering measurements were performed on thin films of infinite-layer PrNiO$_{2+\delta}$. The results show significant differences in the superlattice reflection at the Ni $L_{3}$ absorption edge compared to that at the Pr $M_{5}$ resonance in their dependence on energy, temperature, and local symmetry. These differences point to two distinct charge orders, although they share the same in-plane wavevectors. It is suggested that these dissimilarities could be linked to the excess oxygen dopants, given that the resonant reflections were observed in an incompletely reduced PrNiO$_{2+\delta}$ film. Furthermore, azimuthal analysis indicates that the oxygen ligands likely play a crucial role in the charge modulation revealed at the Ni $L_{3}$ resonance.
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Received: 05 September 2024
Express Letter
Published: 14 October 2024
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| PACS: |
74.70.-b
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(Superconducting materials other than cuprates)
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74.25.-q
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(Properties of superconductors)
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74.25.Jb
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(Electronic structure (photoemission, etc.))
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74.20.-z
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(Theories and models of superconducting state)
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