Orbital Frustration and Resonating Valence Bond State in the Spin-1/2 Triangular Lattice LiNiO2

Yoshio Kitaoka; Tatsuo Kobayashi; Akihiro Kōda; Hayato Wakabayashi; Yoshihiro Niino; Hirokazu Yamakage; Shinichiro Taguchi; Kiichi Amaya; Tatsuo Kobayashi; Akihiro Kōda; Kazunari Yamaur; Mikio Takano; Atushi Hirano; Ryoji Kanno; Yoshio Kitaoka; Tatsuo Kobayashi; Kiichi Amaya; Mikio Takano

doi:10.1143/JPSJ.67.3703

Orbital Frustration and Resonating Valence Bond State in the Spin-1/2 Triangular Lattice LiNiO₂

Yoshio Kitaoka, Tatsuo Kobayashi, Akihiro Kōda, Hayato Wakabayashi, Yoshihiro Niino, Hirokazu Yamakage, Shinichiro Taguchi, Kiichi Amaya, Tatsuo Kobayashi, Akihiro Kōda, Kazunari Yamaur, Mikio Takano, Atushi Hirano, Ryoji Kanno, Yoshio Kitaoka, Tatsuo Kobayashi, Kiichi Amaya, Mikio Takano

Research output: Contribution to journal › Article

88 Citations (Scopus)

Abstract

From the ⁷Li nuclear magnetic resonance (NMR) and specific heat measurements of LiNiO₂, consisting of a spin-1/2 triangular lattice, it is demonstrated that the previously suggested spin-giass-like freezing below T_sg = 8K. which is caused by defects of Li ions: is not the true ground state, but rather a quantum disordered state is realized without a spin gap. This state is characterized by power-law behavior of the temperature dependence of the specific heat below 0.5 K. A spin-liquid state with short-range ferromagnetic correlations is suggested from new insight into the frustration of orbital ordering for doubly degenerate e_g shells in the triangular lattice.

Original language	English
Pages (from-to)	3703-3706
Number of pages	4
Journal	journal of the physical society of japan
Volume	67
Issue number	11
DOIs	https://doi.org/10.1143/JPSJ.67.3703
Publication status	Published - Jan 1 1998
Externally published	Yes

Keywords

NMR
orbital degree of freedom
quantum spin system
resonating valence bond
specific heatm
triangular lattice

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.67.3703

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Kitaoka, Y., Kobayashi, T., Kōda, A., Wakabayashi, H., Niino, Y., Yamakage, H., Taguchi, S., Amaya, K., Kobayashi, T., Kōda, A., Yamaur, K., Takano, M., Hirano, A., Kanno, R., Kitaoka, Y., Kobayashi, T., Amaya, K., & Takano, M. (1998). Orbital Frustration and Resonating Valence Bond State in the Spin-1/2 Triangular Lattice LiNiO₂. journal of the physical society of japan, 67(11), 3703-3706. https://doi.org/10.1143/JPSJ.67.3703

Orbital Frustration and Resonating Valence Bond State in the Spin-1/2 Triangular Lattice LiNiO₂. / Kitaoka, Yoshio; Kobayashi, Tatsuo; Kōda, Akihiro; Wakabayashi, Hayato; Niino, Yoshihiro; Yamakage, Hirokazu; Taguchi, Shinichiro; Amaya, Kiichi; Kobayashi, Tatsuo; Kōda, Akihiro; Yamaur, Kazunari; Takano, Mikio; Hirano, Atushi; Kanno, Ryoji; Kitaoka, Yoshio; Kobayashi, Tatsuo; Amaya, Kiichi; Takano, Mikio.

In: journal of the physical society of japan, Vol. 67, No. 11, 01.01.1998, p. 3703-3706.

Research output: Contribution to journal › Article

Kitaoka, Y, Kobayashi, T, Kōda, A, Wakabayashi, H, Niino, Y, Yamakage, H, Taguchi, S, Amaya, K, Kobayashi, T, Kōda, A, Yamaur, K, Takano, M, Hirano, A, Kanno, R, Kitaoka, Y, Kobayashi, T, Amaya, K & Takano, M 1998, 'Orbital Frustration and Resonating Valence Bond State in the Spin-1/2 Triangular Lattice LiNiO₂', journal of the physical society of japan, vol. 67, no. 11, pp. 3703-3706. https://doi.org/10.1143/JPSJ.67.3703

Kitaoka, Yoshio ; Kobayashi, Tatsuo ; Kōda, Akihiro ; Wakabayashi, Hayato ; Niino, Yoshihiro ; Yamakage, Hirokazu ; Taguchi, Shinichiro ; Amaya, Kiichi ; Kobayashi, Tatsuo ; Kōda, Akihiro ; Yamaur, Kazunari ; Takano, Mikio ; Hirano, Atushi ; Kanno, Ryoji ; Kitaoka, Yoshio ; Kobayashi, Tatsuo ; Amaya, Kiichi ; Takano, Mikio. / Orbital Frustration and Resonating Valence Bond State in the Spin-1/2 Triangular Lattice LiNiO₂. In: journal of the physical society of japan. 1998 ; Vol. 67, No. 11. pp. 3703-3706.

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abstract = "From the 7Li nuclear magnetic resonance (NMR) and specific heat measurements of LiNiO2, consisting of a spin-1/2 triangular lattice, it is demonstrated that the previously suggested spin-giass-like freezing below Tsg = 8K. which is caused by defects of Li ions: is not the true ground state, but rather a quantum disordered state is realized without a spin gap. This state is characterized by power-law behavior of the temperature dependence of the specific heat below 0.5 K. A spin-liquid state with short-range ferromagnetic correlations is suggested from new insight into the frustration of orbital ordering for doubly degenerate eg shells in the triangular lattice.",

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AU - Wakabayashi, Hayato

AU - Niino, Yoshihiro

AU - Yamakage, Hirokazu

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AU - Kobayashi, Tatsuo

AU - Kōda, Akihiro

AU - Yamaur, Kazunari

AU - Takano, Mikio

AU - Hirano, Atushi

AU - Kanno, Ryoji

AU - Kitaoka, Yoshio

AU - Kobayashi, Tatsuo

AU - Amaya, Kiichi

AU - Takano, Mikio

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AB - From the 7Li nuclear magnetic resonance (NMR) and specific heat measurements of LiNiO2, consisting of a spin-1/2 triangular lattice, it is demonstrated that the previously suggested spin-giass-like freezing below Tsg = 8K. which is caused by defects of Li ions: is not the true ground state, but rather a quantum disordered state is realized without a spin gap. This state is characterized by power-law behavior of the temperature dependence of the specific heat below 0.5 K. A spin-liquid state with short-range ferromagnetic correlations is suggested from new insight into the frustration of orbital ordering for doubly degenerate eg shells in the triangular lattice.

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KW - quantum spin system

KW - resonating valence bond

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