1. Absence of 3a0charge density wave order in the infinite-layer nickelate NdNiO2
- Author
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Parzyck, C. T., Gupta, N. K., Wu, Y., Anil, V., Bhatt, L., Bouliane, M., Gong, R., Gregory, B. Z., Luo, A., Sutarto, R., He, F., Chuang, Y.-D., Zhou, T., Herranz, G., Kourkoutis, L. F., Singer, A., Schlom, D. G., Hawthorn, D. G., and Shen, K. M.
- Abstract
A hallmark of many unconventional superconductors is the presence of many-body interactions that give rise to broken-symmetry states intertwined with superconductivity. Recent resonant soft X-ray scattering experiments report commensurate 3a0charge density wave order in infinite-layer nickelates, which has important implications regarding the universal interplay between charge order and superconductivity in both cuprates and nickelates. Here we present X-ray scattering and spectroscopy measurements on a series of NdNiO2+xsamples, which reveal that the signatures of charge density wave order are absent in fully reduced, single-phase NdNiO2. The 3a0superlattice peak instead originates from a partially reduced impurity phase where excess apical oxygens form ordered rows with three-unit-cell periodicity. The absence of any observable charge density wave order in NdNiO2highlights a crucial difference between the phase diagrams of cuprate and nickelate superconductors.
- Published
- 2024
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