Dynamical Structure Factors of the S=1 / 2 Bond-Alternating Spin Chain with a Next-Nearest-Neighbor Interaction in Magnetic Fields : Condensed Matter: Electronic Properties, etc.
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概要
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The dynamical structure factor of the S = 1/2 bond-alternating spin chain with a next-nearest-neighbor interaction in magnetic field is investigated using the continued fraction method based on the Lanczos algorithm. When the plateau exists on the magnetization curve, the longitudinal dynamical structure factor shows a large intensity with a periodic dispersion relation, while the transverse one shows a large intensity with an almost dispersionless mode. The periodicity and the amplitude of the dispersion relation in the longitudinal dynamical structure factor are sensitive to the coupling constants. The dynamical structure factor of the S = 1/2 two-leg ladder in magnetic field is also calculated in the strong interchain-coupling regime. The dynamical structure factor shows gapless or gapful behavior depending on the wave vector along the rung.
- 社団法人日本物理学会の論文
- 2000-10-15
著者
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SUGA Sei-ichiro
Department of Applied Physics, Osaka University
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Usami Mamoru
Department Of Applied Physics Osaka University:(present)research And Development Department Tochigi
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Suga Seiichiro
Department of Applied Physics, Osaka University
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Suga Sei-ichiro
Department Of Applied Physics Osaka University
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Suga Seiichiro
Department Of Applied Physics Osaka University
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