Stationary Self-Localized Magnons in Heisenberg Antiferromagnets
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概要
- 論文の詳細を見る
Magnon-magnon interactions in a d-dimensional version of the simple cubic antifer-romagnet with anisotropic nearest-neighbor exchange interaction and uniaxial aniso-tropy energy are studied to show the existence of a stationary self-localized magnonmode appearing below the magnon frequency band. This is an intrinsic nonlinearmode corresponding to a local large-angle, low-frequency precessional motion ofspins, quantum states of which are characterized by the indefiniteness of the numberof relevant magnons. The formulation of the problem is made by employing theDyson-Maleev transformation and a coherent-state ansatz. Approximate analyticalexpressions for the eigenfrequency and profile functions of the stationary self-local-ized mode are obtained in the strong-localization limit for arbitrary d.
- 社団法人日本物理学会の論文
- 1991-06-15
著者
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Takeno Shozo
Laboratory Of Physics Faculty Of Engineering And Design Kyoto Institute Of Technology
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Kawasaki Kazuko
Department Of Physics Faculty Of Science Nara Women's University
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Kawasaki Kazuko
Department of Physics,Faculty of Science,Nara Women's University
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