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三角海森堡反铁磁体中的磁激发
  • ISSN号：1674-1056
  • 期刊名称：《中国物理B：英文版》
  • 时间：0
  • 分类：O482.5[理学—固体物理;理学—物理]
  • 作者机构：[1]苏州大学物理科学与技术学院,江苏苏州215006
  • 相关基金：江苏省自然科学基金资助项目（BK2006047）,国家自然科学基金资助项目（10374069,50832002）
作者： 张冕[1], 蒋青[1]
关键词： 海森堡模型, 自旋波理论, 三角磁结构, 磁激发, Heisenberg antiferromagnet, spin-wave theory , triangular spin structure , magnetic excitation
中文摘要：

利用标准的自旋波理论，研究了二维三角海森堡反铁磁体的色散关系．分别采用了三子格模型和单子格模型来描述同一平面上几何阻挫的三角反铁磁结构，并对两者的结果进行了比较和分析．研究表明无论是基于三子格模型还是基于单子格模型，磁激发展示了一致的机制，色散关系也完全相同．单子格模型的研究为以后计算三维六角密排晶格的磁激发提供了简便的方法．

英文摘要：

On the basis of standard spin-wave theory, the magnetic dispersion relations for a two-dimensional Heisenberg antiferromaguet are investigated. Both three-sublattiee model and one-sublattiee model are utilized to describe the geometrical frustration of triangular antiferromagnetic structure. No matter based on the three-sublattice model or on the one-sublattice model, the magnetic excitation exhibits the unified mechanism and the dispersion relation shows exactly the same behaviors. Therefore, the one-sublattice model is a simplified and efficient approach, which can be used to further investigate the magnetic excitation of three-dimensional triangular antiferromaguet.

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期刊信息
  • 《中国物理B：英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国物理学会和中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京 中关村 中国科学院物理研究所内
  • 邮编：100080
  • 邮箱：
  • 电话：010-82649026 82649519
  • 国际标准刊号：ISSN：1674-1056
  • 国内统一刊号：ISSN：11-5639/O4
  • 邮发代号:
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  • 被引量:406