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.
| 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 | |
| Publication status | Published - 1998 |
| Externally published | Yes |
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Keywords
- NMR
- orbital degree of freedom
- quantum spin system
- resonating valence bond
- specific heatm
- triangular lattice
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
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, 1998, p. 3703-3706.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Orbital Frustration and Resonating Valence Bond State in the Spin-1/2 Triangular Lattice LiNiO2
AU - Kitaoka, Yoshio
AU - Kobayashi, Tatsuo
AU - Kōda, Akihiro
AU - Wakabayashi, Hayato
AU - Niino, Yoshihiro
AU - Yamakage, Hirokazu
AU - Taguchi, Shinichiro
AU - Amaya, Kiichi
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
PY - 1998
Y1 - 1998
N2 - 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.
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.
KW - NMR
KW - orbital degree of freedom
KW - quantum spin system
KW - resonating valence bond
KW - specific heatm
KW - triangular lattice
UR - http://www.scopus.com/inward/record.url?scp=33646652858&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33646652858&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.67.3703
DO - 10.1143/JPSJ.67.3703
M3 - Article
AN - SCOPUS:33646652858
VL - 67
SP - 3703
EP - 3706
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 11
ER -