Probing La-based nickelates with Ni 1 s core-level photoelectron spectroscopy
cond-mat.str-el, cond-mat.mtrl-sci
Submitted: 2026-06-16
Updated: 2026-06-16
Journal ref: Phys. Rev. B 114, 185129 (2026)
DOI: 10.1103/fkvs-lfjm
License: http://creativecommons.org/licenses/by/4.0/
The gist: We present a comparative Ni core level photoemission study of La 3 Ni 2 O 7, Nd 3 Ni 2 O 7, and LaNiO 3 using both the Ni 2p and the Ni 1s.
Terminology
Abstract
We present a comparative Ni core level photoemission study of La 3 Ni 2 O 7, Nd 3 Ni 2 O 7, and LaNiO 3 using both the Ni 2p and the Ni 1s. We address the challenges in analyzing the widely investigated Ni 2p spectra arising from the substantial overlap in energy of the Ni 2p with the La 3d. We show that on the other hand the deep Ni 1s core level does provide a clean view on the intrinsic electronic excitations and we highlight its potential to resolve detailed differences in the electronic structure within the strongly correlated Ruddlesden-Popper series La n+1 Ni n O 3n+1.
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