2003年11月
Magnetic excitation of orthogonal dimer heisenberg spin system for SrCu2(BO3)(2)
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
- ,
- ,
- 巻
- 17
- 号
- 28
- 開始ページ
- 5047
- 終了ページ
- 5051
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1142/S0217979203020181
- 出版者・発行元
- WORLD SCIENTIFIC PUBL CO PTE LTD
SrCu2(BO3)(2) is a new two-dimensional spin gap system and the magnetic behaviour of this compound is explained well by the two-dimensional orthogonal dimer Heisenberg model. Recently several excitations have been observed by inelastic neutron scattering and other experiments. We study features of these excitations by Lanczos method and perturbation technique. A triplet excitation has an almost localised nature. This localised character is observed as an almost flat band in neutron scattering. On the other hand, bound states of two triplet excitations, which have dispersive character, are stable in contrast to ordinary magnetic systems. We calculate the dynamic structure factor by a Lanczos method in finite systems and compare our results with experiments.
- リンク情報
- ID情報
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- DOI : 10.1142/S0217979203020181
- ISSN : 0217-9792
- Web of Science ID : WOS:000187673400014