Magnetic excitations in Nd𝑛+1 Ni𝑛 O3𝑛+1 Ruddlesden-Popper nickelates observed via resonant inelastic x-ray scattering
Journal Article
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· Physical Review. B
- Harvard Univ., Cambridge, MA (United States)
- Harvard Univ., Cambridge, MA (United States); Institute of Science and Technology Austria (ISTA), Klosterneuburg (Austria)
- Cornell Univ., Ithaca, NY (United States)
- Cornell University
- National Synchrotron Light Source II; Brookhaven National Laboratory
- Harwell Science and Innovation Campus, Didcot (United Kingdom). Diamond Light Source, Ltd.
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
Magnetic interactions are thought to play a key role in the properties of many unconventional superconductors, including cuprates, iron pnictides, and square-planar nickelates. Superconductivity was also recently observed in the bilayer and trilayer Ruddlesden-Popper nickelates, the electronic structure of which is expected to differ from that of cuprates and square-planar nickelates. Here we study how electronic structure and magnetic interactions evolve with the number of layers, 𝑛, in thin film Ruddlesden-Popper nickelates Nd𝑛+1Ni𝑛O3𝑛+1 with 𝑛 = 1,3, and 5 using resonant inelastic x-ray scattering (RIXS). The RIXS spectra are consistent with a high-spin |3𝑑8 $$\underline{𝐿}$$⟩ electronic configuration, resembling that of La2−𝑥Sr𝑥NiO4 and the parent perovskite, NdNiO3. The magnetic excitations soften to lower energy in the structurally self-doped, higher-𝑛 films. In conclusion, our observations confirm that structural tuning is an effective route for altering electronic properties, such as magnetic superexchange, in this prominent family of materials.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), Office of Workforce Development for Teachers & Scientists (WDTS)
- Grant/Contract Number:
- SC0012704; SC0014664; SC0021925
- OSTI ID:
- 2568104
- Alternate ID(s):
- OSTI ID: 2561500
- Report Number(s):
- BNL--228205-2025-JAAM
- Journal Information:
- Physical Review. B, Journal Name: Physical Review. B Journal Issue: 16 Vol. 111; ISSN 2469-9950; ISSN 2469-9969
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:1963980