Abstract
Local spin and orbital textures are investigated by 51V NMR measurements on a triangular-lattice compound BaV10O15 with orbital degrees of freedom and itinerant electrons. The Knight shift shows the spin-singlet V trimer formation in a itinerant phase above the semiconductor-insulator transition temperature TSI=140 K. Below TSI, the observation of the asymmetric electric hyperfine coupling tensor agrees with the orbital order giving direct d-d bonds of the trimer. The remaining paramagnetic spins on a V tetramer exhibit an antiferromagnetic long-range order accompanied by a ferro-type order. The coexistence of the trimer and tetramer with the two opposite magnetism is ascribed to the orbitally induced Peierls instability on a non-half-filling triangular lattice with nonuniform V-V separation.
| Original language | English |
|---|---|
| Article number | 064421 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 84 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2011 Aug 23 |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Spin-singlet trimer state induced by competing orbital order in triangular-lattice BaV10O15 . / Shimizu, Yasuhiro; Matsudaira, Keniichiro; Itoh, Masayuki; Kajita, Tomomasa; Katsufuji, Takuro.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 84, No. 6, 064421, 23.08.2011.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Spin-singlet trimer state induced by competing orbital order in triangular-lattice BaV10O15
AU - Shimizu, Yasuhiro
AU - Matsudaira, Keniichiro
AU - Itoh, Masayuki
AU - Kajita, Tomomasa
AU - Katsufuji, Takuro
PY - 2011/8/23
Y1 - 2011/8/23
N2 - Local spin and orbital textures are investigated by 51V NMR measurements on a triangular-lattice compound BaV10O15 with orbital degrees of freedom and itinerant electrons. The Knight shift shows the spin-singlet V trimer formation in a itinerant phase above the semiconductor-insulator transition temperature TSI=140 K. Below TSI, the observation of the asymmetric electric hyperfine coupling tensor agrees with the orbital order giving direct d-d bonds of the trimer. The remaining paramagnetic spins on a V tetramer exhibit an antiferromagnetic long-range order accompanied by a ferro-type order. The coexistence of the trimer and tetramer with the two opposite magnetism is ascribed to the orbitally induced Peierls instability on a non-half-filling triangular lattice with nonuniform V-V separation.
AB - Local spin and orbital textures are investigated by 51V NMR measurements on a triangular-lattice compound BaV10O15 with orbital degrees of freedom and itinerant electrons. The Knight shift shows the spin-singlet V trimer formation in a itinerant phase above the semiconductor-insulator transition temperature TSI=140 K. Below TSI, the observation of the asymmetric electric hyperfine coupling tensor agrees with the orbital order giving direct d-d bonds of the trimer. The remaining paramagnetic spins on a V tetramer exhibit an antiferromagnetic long-range order accompanied by a ferro-type order. The coexistence of the trimer and tetramer with the two opposite magnetism is ascribed to the orbitally induced Peierls instability on a non-half-filling triangular lattice with nonuniform V-V separation.
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U2 - 10.1103/PhysRevB.84.064421
DO - 10.1103/PhysRevB.84.064421
M3 - Article
AN - SCOPUS:80052364870
VL - 84
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 6
M1 - 064421
ER -