Direct observation of Ni 3+ and Ni 2+ in correlated LaNiO 3−δ films
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The X-ray photoelectron spectroscopic deconvolution analysis is applied to quantitatively distinguish valence states of Ni and to obtain the δ value in LaNiO 3−δ films on Si substrates. The mechanism of the Ni 3+ /Ni 2+ ratio dependent transport is clarified by the combination of transport measurements and first-principle calculations. At lower Ni 3+ /Ni 2+ ratio of 0.39, the LaNiO 2.64 film exhibits semi-conductive behavior with carriers mainly being hopping polarons, while higher Ni 3+ /Ni 2+ ratio transfers the LaNiO 2.84 film to an electronic conductor. The observed reduction of the electron-phonon interaction, shortened mean free path, and increased electron-electron coupling are suggested to be correlated to high Ni 3+ /Ni 2+ ratio.
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With a decrease in the Ni3+/Ni2+ ratio, LNO demonstrates semiconducting behavior as a result of band gap appearance.
“With a decrease in the Ni3+/Ni2+ ratio, the LNO demonstrates semiconducting behavior as a result of band gap appearance, e.g., see [87].”
From Control of Columnar Grain Microstructure in CSD LaNiO3 Films (2023) · cites this paper as [87]
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Research works printed but not linked: 2
- Mott N. F., Metal-Insulator Transition, 2nd edition (Taylor & Francis, London) 1990, p. 59.
- Elliot S. R., The Physics and Chemistry of Solids (Wiley, Chinchester) 1998, p. 513.
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Control of Columnar Grain Microstructure in CSD LaNiO3 Films
Atanova, A. V., Seregin, D. S., Zhigalina, O. M., Khmelenin, D. N., Orlov, G. A., Turkina, D. I., Sigov, A. S., & Vorotilov, K. A. (2023) · Molecules · doi:10.3390/molecules28041938 · Cited by 5 · see citing works
- Authors
- Qiao, L., & Bi, X.
- Affiliations
- Beihang University (CN)
- ORCID
- Qiao, Liang
- Venue
- EPL (Europhysics Letters)
- Publisher
- IOP Publishing
- Published
- 2011-03-01
- Volume
- 93
- Issue
- 5
- Pages
- 57002
- ISSN
- 0295-5075 (ISSN-L)
- 1286-4854
- OpenAlex
- W1954406248
- Cited by
- 147
- References
- 0
- Citations by year
- 2026: 8 · 2025: 18 · 2024: 8 · 2023: 15 · 2022: 16 · 2021: 15 · 2020: 9 · 2019: 8 · 2018: 13 · 2017: 10 · 2016: 7 · 2015: 10 · 2014: 3 · 2013: 2 · 2012: 3
- FWCI
- 1.28
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Europhysics Letters (EPL) (publishedVersion)
- Research Explorer (The University of Manchester) (publishedVersion)
- Funders
- Beihang University
- Program for New Century Excellent Talents in University
- Topics
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Magnetic and transport properties of perovskites and related materials
- Physical Sciences › Materials Science › Materials Chemistry › Electronic and Structural Properties of Oxides
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Physics of Superconductivity and Magnetism
- Keywords
- nickel valence state, Ni3+/Ni2+ ratio, perovskite oxide thin films, semiconductor-metal transition, electron-phonon coupling, electron-electron coupling, mean free path, electronic transport, first-principles calculations
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