Pressure-induced Magnetic Quantum Phase Transition from Gapped Ground State in TlCuCl_3(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
- 論文の詳細を見る
Magnetization measurements under hydrostatic pressure were performed on an S = 1/2 coupled spin dimer system TlCuCl_3 with a gapped ground state under magnetic field H parallel to the [201] direction. With increasing applied pressure P, the gap decreases and closes completely at P_c = 0.42 ± 0.05 kbar. For P > P_c, TlCuCl_3 undergoes antiferromagnetic ordering. A spin-flop transition was observed at H_<sf> ≃ 0 7 T. The spin-flop field is approximately independent of pressure, although the sublattice magnetization increases with pressure. The gap and Neel temperature are presented as functions of pressure. The occurrence of the pressure-induced quantum phase transition is attributed to the relative enhancement of the interdimer exchange interactions compared with the intradimer exchange interaction.
- 社団法人日本物理学会の論文
- 2004-12-15
著者
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FUJISAWA Masashi
Department of Physics, Tokyo Institute of Technology
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TANAKA Hidekazu
Research Center for Low Temperature Physics, Tokyo Institute of Technology
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ONO Toshio
Department of Physics, Tokyo Institute of Technology
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UWATOKO Yoshiya
Institute for Solid State Physics, The University of Tokyo
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Hiraoka T
Faculty Of Integrated Arts And Science Hiroshima University
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Goto Kenji
Department Of Cardiology Matsue Red Cross Hospital
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Goto Kenji
Quantum Beam Science Directorate Japan Atomic Energy Agency
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Ono T
Department Of Physics Tokyo Institute Of Technology
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Ono Toshio
Department Of Oral Biochemistry Nagasaki University School Of Dentistry
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Uwatoko Y
Institute For Solid State Physics The University Of Tokyo
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Uwatoko Y
Faculty Of Integrated Arts And Sciences Hiroshima University:faculty Of General Education Kumamoto U
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Takei Humihiko
Institute For Iron Steel And Other Metals Tohoku University
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Hiraoka T
Faculty Of Science And Engineering Saga University
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Fujisawa M
Department Of Physics Tokyo Institute Of Technology
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Fujisawa Masashi
Department Of Physics Tolyo Institute Of Technology
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Fujisawa Masashi
Department Of Physics Tokyo Institute Of Technology
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Uwatoko Yoshiya
Institute For Solid State Physics (issp) The University Of Tokyo
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Goto Kenji
Department Of Anesthesiology And Resuscitology Okayama University Medical School
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Tanaka Hidekazu
Research Center For Low Temperature Physics Tokyo Institute Of Technology
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