Spin Liquid in a Spin-Frustrated Organic Mott Insulator(Frustrated Systems, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)
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概要
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Magnetism of interacting localized spins on triangular lattice has been of keen interest. We found a quantum spin liquid state in an organic Mott insulator with nearly triangular lattice by means of nuclear-magnetic-resonance experiments. The absence of long-range magnetic ordering was evidenced at low temperatures down to 30mK in spite of an antiferromagnetic exchange interaction of 250K between the neighboring spins. Realization of the spin liquid is attributable to the proximity of the present system to the Mott transition, consistent with the theoretical study of the triangular-lattice Hubbard model. Field-induced inhomogeneous spin state is argued in terms of the effect of disorder on the spin liquid.
- 理論物理学刊行会の論文
- 2005-10-31
著者
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Saito Gunzi
Division Of Chemistry Graduate School Of Science Kyoto University
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Saito Gunzi
Division Of Chemistry Kyoto University
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SHIMIZU YASUHIRO
Department of Surgery, Aichi Cancer Center Hospital
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Miyagawa Kazuya
Department Of Toxicology Hoshi University School Of Pharmacy And Pharmaceutical Sciences
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KANODA Kazushi
Department of Applied Physics, University of tokyo
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Shimizu Yasuhiro
Department Of Gastroenterological Surgery Aichi Cancer Center Hospital
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Kanoda Kazushi
Department Of Applied Physics University Of Tokyo:crest Japan Science And Technology Corporation
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Kanoda Kazushi
Department Of Applied Physics The University Of Tokyo
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Maesato Mitsuhiko
Division Of Chemistry Kyoto University
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Miyagawa Kazuya
Department Of Applied Physics University Of Tokyo:crest Japan Science And Technology Corporation
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Miyagawa Kazuya
Department Of Applied Mathematics Faculty Of Engineering Science Osaka University
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Maesato Mitsuhiko
Division Of Chemistry Graduate School Of Science Kyoto University
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Shimizu Yasuhiro
Department Of Applied Physics University Of Tokyo:division Of Chemistry Kyoto University:(present Ad
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KANODA Kazushi
Department of Applied Physics, University of Tokyo:CREST, Japan Science and Technology Corporation
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SHIMIZU Yasuhiro
Department of Agricultural Chemistry, College of Agriculture, University of Osaka prefecture
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SAITO Gunzi
Division of Chemistry, Kyoto University
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SHIMIZU Yasuhiro
Department of Applied Physics, University of Tokyo:Division of Chemistry, Kyoto University:(Present address)RIKEN
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MAESATO Mitsuhiko
Division of Chemistry, Kyoto University
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MIYAGAWA Kazuya
Department of Applied Physics, University of Tokyo:CREST, Japan Science and Technology Corporation
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