Two-Magnon Bound States in the Triangular and Honeycomb Heisenberg Ferromagnets
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概要
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The bound state problems associated with two magnons in the two-dimensional triangular and honeycomb ferromagnet of spin 1/2 with nearest neighbor exchange integral J(>0) are studied. The Hamiltonians are rewritten in terms of Dyson-Ma1eev boson representation and the 3×3 secular equations to determine the bound state energies are obtained for both ferromagnets. At most two bound states exist for a triangular ferromagnet and, on the other hand, for a honeycomb ferromagnet three bound states were found to exist extremely near the free two-magnon band and at the corner of the first Brillouin zone for the total wave vector K of the pair. The effect of the number z of nearest neighboring bonds on the appearance of bound states is discussed.
- 理論物理学刊行会の論文
- 1975-12-25
著者
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WADA Koh
Department of Physics, Hokkaido University
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OGUCHI Tamio
National Research Institute for Metals
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Ishikawa Takuma
Department Of Materials Science Iwakimeisei University
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Wada Koh
Department Of Physics Faculty Of Science Hokkaido University
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Wada Koh
Department Of Physics Hokkaido University : Department Of Physics Tokyo Institute Of Technology
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OGUCHI Takehiko
Department of Physics, Tokyo Institute of Technology : Department of Sciences and Mathematics, The Technological University of Nagaoka
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ISHIKAWA Takuma
Department of Materials Science, Iwakimeisei University
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WADA Koh
Department of Physics, Hokkaido University : Department of Physics, Tokyo Institute of Technology /Department of Physics, Tokyo Institute of Technology
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