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Survival of short-range order in the Ising model on negatively curved surfaces

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タイトル: Survival of short-range order in the Ising model on negatively curved surfaces
著者: Sakaniwa, Yasunori 著作を一覧する
Shima, Hiroyuki 著作を一覧する
キーワード: ferromagnetism
Ising model
magnetic domains
magnetic transitions
short-range order
発行日: 2009年 8月
出版者: American Physical Society
誌名: Physical Review E
巻: 80
号: 2
開始ページ: 021103
出版社 DOI: 10.1103/PhysRevE.80.021103
抄録: We examine the ordering behavior of the ferromagnetic Ising lattice model defined on a surface with a constant negative curvature. Small-sized ferromagnetic domains are observed to exist at temperatures far greater than the critical temperature, at which the inner-core region of the lattice undergoes a mean-field phase transition. The survival of short-range order at such high temperatures can be attributed to strong boundary-spin contributions to the ordering mechanism as a result of which boundary effects remain active even within the thermodynamic limit. Our results are consistent with the previous finding of disorder-free Griffiths phase that is stable at temperatures lower than the mean-field critical temperature.
Rights: ©2009 The American Physical Society
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 島 弘幸


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