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フルテキストURL2008010238.pdf ( 230.0KB ) 公開日 2010-04-16
タイトルOder-disorder and displacive transitions in a quantum ising model
作成者Mashiyama, Hiroyuki
Mkam Tchouobiap, Serges Eric
Ashida, Masami
作成者ヨミマシヤマ, ヒロユキ
アシダ, マサミ
作成者別表記増山, 博行
作成者所属山口大学大学院理工学研究科(理学)
内容記述(抄録等)A ferrodistortive phase transition is analyzed for a quantum particles in a simple quartic potential. The interactions are taken into account by the mean-field approximation. A quantum thermodynamic treatment gives analytic expressions for the static susceptibility, the specific heat and the soft mode frequency. The Rhodes-Wohlfarth ratio is a measure whether the system is order-disorder or displacive, however, the border is fuzzy depending on the interaction strength. The quantum effect is discussed when the transition takes place at low temperature. Whether the atomic density is a single or multiple peak distributions seems to be a definite criterion for the character of the structural phase transition.
本文言語eng
著者キーワードorder-disorder
displacive
ferroelectric transition
anharmonic-oscillator model
quantum Ising model
susceptibility
specific heat
Debye-Waller factor
資料タイプtext
ファイル形式application/pdf
出版者The Physical Society of Japan
出版者ヨミニホン ブツリ ガッカイ
NII資料タイプ学術雑誌論文
査読の有無査読あり
ISSN0031-9015
NCIDAA00704814
掲載誌名Journal of the Physical Society of Japan
77
8
開始ページ084709-1
終了ページ084709-6
発行日2008
DOIinfo:doi/10.1143/JPSJ.77.084709
関連情報URL(IsPartOf)http://www.ipap.jp/jpsj/index.html
権利関係Copyright c (2008)The Physical Society of Japan
著者版/出版社版著者版
リポジトリID2008010238
地域区分山口大学
URIhttp://www.lib.yamaguchi-u.ac.jp/yunoca/handle/2008010238