Strongly correlated metallic state of LaNio3: 139La NMR study

Akihiro Sakai; Guo Qing Zheng; Yoshio Kitaoka

doi:10.1143/jpsjs.71s.166

Strongly correlated metallic state of LaNio₃: ¹³⁹La NMR study

Akihiro Sakai, Guo Qing Zheng, Yoshio Kitaoka

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

LaNiO₃ is a transition-metal oxide with Perovskite crystal structure where Ni is in the low spin state of t⁶₂e ¹_g. It is a metal and shows enhanced susceptibility χ with a strong temperature (T) dependence at low T. We have carried out a ¹³⁹ La NMR study in the poly crystal sample in the temperature range between 1.4 K and 300 K. We find that the uniform spin susceptibility is T-independent which suggests that the low-T upturn in χ is an extrinsic property of the metallic state. The results of the Knight shift and the nuclear spin relaxation rate indicate that the spin susceptibility is almost wave-vector (q) independent, implying that the electron correlation is dominantly due to a band narrowing, mass enhancement, effect near a metal-insulator transition, rather than to a ferromagnetic interaction peaked at q=O.

Original language	English
Pages (from-to)	166-168
Number of pages	3
Journal	journal of the physical society of japan
Volume	71
Issue number	SUPPL.
DOIs	https://doi.org/10.1143/jpsjs.71s.166
Publication status	Published - 2002
Externally published	Yes

Keywords

LaNI0
Mass enhancement
NMR
Strong correlation

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/jpsjs.71s.166

Cite this

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title = "Strongly correlated metallic state of LaNio3: 139La NMR study",

abstract = "LaNiO3 is a transition-metal oxide with Perovskite crystal structure where Ni is in the low spin state of t62e 1g. It is a metal and shows enhanced susceptibility χ with a strong temperature (T) dependence at low T. We have carried out a 139 La NMR study in the poly crystal sample in the temperature range between 1.4 K and 300 K. We find that the uniform spin susceptibility is T-independent which suggests that the low-T upturn in χ is an extrinsic property of the metallic state. The results of the Knight shift and the nuclear spin relaxation rate indicate that the spin susceptibility is almost wave-vector (q) independent, implying that the electron correlation is dominantly due to a band narrowing, mass enhancement, effect near a metal-insulator transition, rather than to a ferromagnetic interaction peaked at q=O.",

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author = "Akihiro Sakai and Zheng, {Guo Qing} and Yoshio Kitaoka",

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T1 - Strongly correlated metallic state of LaNio3

T2 - 139La NMR study

AU - Sakai, Akihiro

AU - Zheng, Guo Qing

AU - Kitaoka, Yoshio

PY - 2002

Y1 - 2002

N2 - LaNiO3 is a transition-metal oxide with Perovskite crystal structure where Ni is in the low spin state of t62e 1g. It is a metal and shows enhanced susceptibility χ with a strong temperature (T) dependence at low T. We have carried out a 139 La NMR study in the poly crystal sample in the temperature range between 1.4 K and 300 K. We find that the uniform spin susceptibility is T-independent which suggests that the low-T upturn in χ is an extrinsic property of the metallic state. The results of the Knight shift and the nuclear spin relaxation rate indicate that the spin susceptibility is almost wave-vector (q) independent, implying that the electron correlation is dominantly due to a band narrowing, mass enhancement, effect near a metal-insulator transition, rather than to a ferromagnetic interaction peaked at q=O.

AB - LaNiO3 is a transition-metal oxide with Perovskite crystal structure where Ni is in the low spin state of t62e 1g. It is a metal and shows enhanced susceptibility χ with a strong temperature (T) dependence at low T. We have carried out a 139 La NMR study in the poly crystal sample in the temperature range between 1.4 K and 300 K. We find that the uniform spin susceptibility is T-independent which suggests that the low-T upturn in χ is an extrinsic property of the metallic state. The results of the Knight shift and the nuclear spin relaxation rate indicate that the spin susceptibility is almost wave-vector (q) independent, implying that the electron correlation is dominantly due to a band narrowing, mass enhancement, effect near a metal-insulator transition, rather than to a ferromagnetic interaction peaked at q=O.

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