2005年4月
Criticality of the uniform magnetic order in a ferromagnetic-antiferromagnetic random alternating quantum spin chain
PHYSICAL REVIEW B
- 巻
- 71
- 号
- 14
- 開始ページ
- 144401.1-144401.10
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.71.144401
- 出版者・発行元
- AMERICAN PHYSICAL SOC
An S=1/2 ferromagnetic (F) and antiferromagnetic (AF) random alternating Heisenberg quantum spin chain model is investigated in connection to its realization compound (CH3)(2)CHNH3Cu(ClxBr1-x)(3). The exchange interaction bonds consist of alternating strong F-AF random bonds and weak uniform AF bonds. Using the quantum Monte Carlo method we have found that the excitation energy gap closes and the uniform AF order becomes critical in the intermediate-concentration region. This finding explains the experimental observation of the magnetic transition by considering weak interchain interactions. The present results suggest that uniform AF order survives even in the presence of randomly located ferromagnetic bonds. This may be an exotic quantum effect.
- リンク情報
-
- DOI
- https://doi.org/10.1103/PhysRevB.71.144401
- J-GLOBAL
- https://jglobal.jst.go.jp/detail?JGLOBAL_ID=200902262076056982
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000228758700039&DestApp=WOS_CPL
- URL
- http://jglobal.jst.go.jp/public/200902262076056982
- ID情報
-
- DOI : 10.1103/PhysRevB.71.144401
- ISSN : 1098-0121
- J-Global ID : 200902262076056982
- Web of Science ID : WOS:000228758700039