A broken translation symmetry has recently been revealed in infinite-layer nickelates, which has piqued considerable interest in its origin and relation to superconductivity, as well as in its comparison to charge order in cuprates. Here, by performing resonant x-ray scattering measurements in thin films of infinite-layer PrNiO2+{\delta}, we find that the superlattice reflection at the Ni L3 absorption edge differs considerably from that at the Pr M5 resonance in their dependence on energy, temperature, and local symmetry, indicating they are two distinct charge orders despite the same in-plane wavevectors. These dissimilarities might be related to the excess oxygen dopants, considering that the resonant reflections were observed in an incompletely reduced PrNiO2+{\delta} film. In addition, our azimuthal analysis suggests that the oxygen ligands should play a pivotal role in the charge modulation revealed at the Ni L3 resonance.
@article{arxiv.2303.02865,
title = {Two Distinct Charge Orders in Infinite-layer PrNiO2+{\delta} revealed by Resonant X-ray Diffraction},
author = {Xiaolin Ren and Ronny Sutarto and Qiang Gao and Qisi Wang and Jiarui Li and Yao Wang and Tao Xiang and Jiangping Hu and J. Chang and Riccardo Comin and X. J. Zhou and Zhihai Zhu},
journal= {arXiv preprint arXiv:2303.02865},
year = {2024}
}