Phase Diagram for Two-Dimensional Spin Systems with Ladder, Plaquette and Mixed-Spin Structures : Condensed Matter: Electronic Properties, etc.
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概要
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By using the cluster expansion techniques, we study the excitation spectrum for the two-dimensional quantum spin systems with ladder, plaquette and mixed-spin structures. We thus determine the phase boundary between the spin-gap phase and the magnetically ordered phase rather precisely. The phase diagram obtained is consistent with the one previously obtained via the staggered susceptibility, and is further improved for several cases.
- 社団法人日本物理学会の論文
- 2000-06-15
著者
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Koga Akihisa
Department Of Applied Physics Osaka University
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Kawakami Norio
Department Of Applied Physics Osaka University
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