Longitudinal Spin-Wave Mode Near Quantum Critical Point Due to Uniaxial Anisotropy(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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A longitudinal excitation mode is important in spin-wave theory for three-dimensional interacting integer spin systems with uniaxial anisotropy of easy plane type. There is a critical value of the anisotropy above which the long-range order disappears. Owing to suppression of the magnetic moment near the quantum critical point, spin fluctuations parallel to the ordered moment appear as the longitudinal mode with a substantially strong inelastic neutron scattering intensity. We propose that the longitudinal mode is observable in the pressure-induced ordered phase of a candidate magnet NiCl_2- 4SC(NH_2)_2.
- 社団法人日本物理学会の論文
- 2007-07-15
著者
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MATSUMOTO Masashige
Department of Physics, Shizuoka University
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KOGA Mikito
Department of Education, Shizuoka University
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Koga Mikito
Department Of Education Shizuoka University
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Matsumoto Masashige
Department Of Physics Faculty Of Science Shizuoka University
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