Reply to "Comment on newly found Charge Density Waves in infinite layer Nickelates''

Charles C. Tam; Jaewon Choi; Xiang Ding; Stefano Agrestini; Abhishek Nag; Mei Wu; Bing Huang; Huiqian Luo; Peng Gao; Mirian Garcia-Fernandez; Liang Qiao; Ke-Jin Zhou

arXiv · 2307.13569

Reply to "Comment on newly found Charge Density Waves in infinite layer Nickelates''

Charles C. Tam·Jaewon Choi·Xiang Ding·Stefano Agrestini·Abhishek Nag·Mei Wu·Bing Huang·Huiqian Luo·Peng Gao·Mirian Garcia-Fernandez·Liang Qiao·Ke-Jin Zhou

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Abstract

Charge density waves (CDW) have been reported in NdNiO$_2$ and LaNiO$_2$ thin films grown on SrTiO$_3$ substrates using Ni-$L_3$ resonant x-ray scattering in Refs. [1-3]. In their comment [arXiv:2306.15086] on these reports, Pelliciari et al. found no evidence for a CDW in a NdNiO$_2$ film by performing fixed-momentum energy-dependent measurements. Instead, they observed a nearby non-resonant scattering peak, attributed to the (101) substrate reflection, made accessible at Ni-$L_3$ due to third harmonic light contamination. Here we present fixed-momentum energy-dependent resonant inelastic x-ray scattering measurements across Ni-$L_3$ on NdNiO$_2$, used in the preceding study [1]. We see intrinsic Ni-$L_3$ energy profiles at all measured \textbf{Q} values, including a strong resonance effect at $\mathbf{Q}_\mathrm{CDW} = (-1/3, 0, 0.316)$ reciprocal lattice units. Attempts to measure the (101) substrate peak using third harmonic light at Ni-$L_3$ at I21, Diamond were unfruitful. Our results clearly demonstrate the electronic origin of the scattering peak published in Ref. [1] and lack of a detectable structural component in the peak.

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Charles C. Tam, Jaewon Choi, Xiang Ding, Stefano Agrestini, Abhishek Nag, Mei Wu, Bing Huang, Huiqian Luo, Peng Gao, Mirian Garcia-Fernandez, Liang Qiao, Ke-Jin Zhou. 2023-07-25. Reply to "Comment on newly found Charge Density Waves in infinite layer Nickelates''. https://arxiv.org/abs/2307.13569

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