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  1. 紀要論文
  2. 琉球大学理工学部紀要 理学編
  3. 27号
  1. 部局別インデックス
  2. 理学部

Constant Coupling Approximations to Anisotropic Heisenberg Model

http://hdl.handle.net/20.500.12000/23673
http://hdl.handle.net/20.500.12000/23673
c777ea0e-9021-4b13-bf72-67a6d08eec6d
名前 / ファイル ライセンス アクション
No27p019.pdf No27p019.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2012-03-05
タイトル
タイトル Constant Coupling Approximations to Anisotropic Heisenberg Model
言語 en
作成者 Matayoshi, Seitaro

× Matayoshi, Seitaro

en Matayoshi, Seitaro

Shinjo, Tsuneo

× Shinjo, Tsuneo

en Shinjo, Tsuneo

又吉, 清太郎

× 又吉, 清太郎

ja 又吉, 清太郎

新城, 恒夫

× 新城, 恒夫

ja 新城, 恒夫

アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
内容記述
内容記述タイプ Other
内容記述 The Curie points T_c (μ) as the function of anisotropic interaction parameter μ are calculated by both the constant coupling and the improved constant coupling approximations. T_c (μ) by these approximations decrease, as the parameter μ increases, with similar tendencies on the whole. Especially in two dimensional system, the Curie points become T_c = 0 and dT_c/dμ= infinity at μ= 1. The short range orders are investigated to understand the physical meaning of the sudden change in the neighbourhood of μ= 1. The effect of the second neighbour anisotropic exchange interaction on the curie point is studied by two approximations mentioned above. It is obtained that the occurrence of the order in this anisotropic system is enhanced if the second neighbour exchange interaction parameter is ferromagnetic, and is suppressed if antiferromagnetic, as in the isotropic system. The Curie points calculated by these two approximations are in contradiction to the rigorous theory in the isotropic low dimensional systems. Discussions are given how to overcome the faults In these approximate methods. It is carried out to extend the theorem due to Mermin and Wagner into the anisotropic Heisenberg model with finite range interactions.
内容記述タイプ Other
内容記述 紀要論文
出版者
言語 ja
出版者 琉球大学理工学部
言語
言語 jpn
資源タイプ
資源タイプ departmental bulletin paper
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ NA
出版タイプResource http://purl.org/coar/version/c_be7fb7dd8ff6fe43
識別子
識別子 http://hdl.handle.net/20.500.12000/23673
識別子タイプ HDL
収録物識別子
収録物識別子タイプ NCID
収録物識別子 AN0025080X
収録物名
言語 ja
収録物名 琉球大学理工学部紀要. 理学編
書誌情報
号 27, p. 19-38
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