TY - JOUR
T1 - Universal orbital and magnetic structures in infinite-layer nickelates
AU - Rossi, M.
AU - Lu, H.
AU - Lee, K.
AU - Goodge, B. H.
AU - Choi, J.
AU - Osada, M.
AU - Lee, Y.
AU - Li, D.
AU - Wang, B. Y.
AU - Jost, D.
AU - Agrestini, S.
AU - Garcia-Fernandez, M.
AU - Shen, Z. X.
AU - Zhou, Ke-Jin
AU - Been, E.
AU - Moritz, B.
AU - Kourkoutis, L. F.
AU - Devereaux, T. P.
AU - Hwang, H. Y.
AU - Lee, W. S.
PY - 2024/1
Y1 - 2024/1
N2 - We conducted a comparative study of the rare-earth infinite-layer nickelate films, RNiO2 (R = La, Pr, and Nd), using resonant inelastic x-ray scattering (RIXS). We found that the gross features of the orbital configurations are essentially the same, with minor variations in the detailed hybridization. For low-energy excitations, we unambiguously confirm the presence of damped magnetic excitations in all three compounds. By fitting to a linear spin-wave theory, comparable spin exchange coupling strengths and damping coefficients are extracted, indicating a universal magnetic structure in the infinite-layer nickelates. Interestingly, while signatures of a charge order are observed in LaNiO2 in the quasielastic region of the RIXS spectrum, it is absent in NdNiO2 and PrNiO2. This prompts further investigation into the universality and the origins of charge order within the infinite-layer nickelates. © 2024 American Physical Society.
AB - We conducted a comparative study of the rare-earth infinite-layer nickelate films, RNiO2 (R = La, Pr, and Nd), using resonant inelastic x-ray scattering (RIXS). We found that the gross features of the orbital configurations are essentially the same, with minor variations in the detailed hybridization. For low-energy excitations, we unambiguously confirm the presence of damped magnetic excitations in all three compounds. By fitting to a linear spin-wave theory, comparable spin exchange coupling strengths and damping coefficients are extracted, indicating a universal magnetic structure in the infinite-layer nickelates. Interestingly, while signatures of a charge order are observed in LaNiO2 in the quasielastic region of the RIXS spectrum, it is absent in NdNiO2 and PrNiO2. This prompts further investigation into the universality and the origins of charge order within the infinite-layer nickelates. © 2024 American Physical Society.
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U2 - 10.1103/PhysRevB.109.024512
DO - 10.1103/PhysRevB.109.024512
M3 - RGC 21 - Publication in refereed journal
SN - 2469-9950
VL - 109
JO - Physical Review B
JF - Physical Review B
IS - 2
M1 - 024512
ER -