Methods of characterizing magnetic multi-polar and spin-liquid phases

表征磁性多极和自旋液相的方法

• 批准号: 21740295
• 负责人: SATO Masahiro
• 金额: $ 2.66万
• 依托单位: Aoyama Gakuin University (2010-2011)The Institute of Physical and Chemical Research (2009)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740295/
• 关键词: 物性基礎論; 磁性; 磁気多極子秩序; ネマティック相; スピン密度波相; ラマン散乱; 厳密解; フラストレーション; カイラリティと多極子; 冷却原子系; 多体系のダイナミクス; 数値解析; 場の理論; 可積分系と厳密解; マルチフェロイクス; スピンカイラリティ; マグノン・スピノン励起; Form Factor法; ダイマー秩序; 冷却原子ガス; 自発的対称性の破れ; エンタングルメントエントロピー

The purpose of this project is to theoretically solvethe following two questions : What are the effective ways of characterizing magnetic multi-polarordered statesand disordered states such as spin liquids? And what kinds of systems are suitable for the realization of these novel states? To this end, I have focused on realistic models for magnets and cold atom systems. In particular, the result for frustrated spin-1/2 J1-J2 chains is most important inthis project. We have accurately determined the rich ground-state phase diagram of the J1-J2 chain with vector-chiral and new Haldane-dimer phases. Wehave also shown that thetemperature and field dependence of theNMR realizationrate and the field dependence of the peak positionof the neutron scattering spectrum can be effectively usedto characterizethe multi-polar liquid phases induced by external magnetic field in the J1-J2 chains.

本项目的目的是从理论上解决以下两个问题：什么是表征磁性多极有序态和无序态（如自旋液体）的有效方法？什么样的系统适合于实现这些新的状态？为此，我重点关注了磁体和冷原子系统的现实模型。特别是自旋为1/2的阻挫J1-J2链的结果在本项目中是最重要的。我们精确地确定了具有矢量手性和新的Haldane二聚体相的J1-J2链的丰富基态相图。我们还表明，NMR实现速率的温度和场依赖性以及中子散射谱峰位的场依赖性可以有效地用来表征外磁场诱导的J1-J2链中的多极液相。

项目成果

Ferromagnetism in spin-1/2 Bose and Fermi gases confined by elongated potential

受细长势限制的自旋 1/2 玻色和费米气体中的铁磁性

• 发表时间: 2010
• 作者: 佐久間広展;多田隆治;池田昌之;柏山祐一郎;大河内直彦;小川奈々子;渡部哲子;田近英一;山本信治;Shintaro Takayoshi
• 通讯作者: Shintaro Takayoshi

Determination of coefficients of bosonized dimer operators in spin-1/2 antiferromagnetic chains and their application

自旋1/2反铁磁链中玻色二聚体算子系数的测定及其应用

• 发表时间: 2010
• 作者: Shintaro Takayoshi;Masahiro Sato
• 通讯作者: Masahiro Sato

Spin-chirality separation and S3-symmetry breakings in the magnetization plateau of the quantum spin tube

量子自旋管磁化平台中的自旋手性分离和 S3 对称性破缺

• DOI: 10.1103/physrevb.85.054416
• 发表时间: 2012
• 期刊: Phys. Rev. B
• 作者: Kouichi Okunishi;Masahiro Sato;Toru Sakai;Kiyomi Okamoto;and Chigak. Itoi
• 通讯作者: and Chigak. Itoi

Effect of four-spin interactions on phase diagram of classical Heisenberg antiferromagnets on stacked triangular lattice under magnetic field

磁场下四自旋相互作用对堆叠三角晶格经典海森堡反铁磁体相图的影响

• 发表时间: 2011
• 作者: Shintaro Takayoshi;Masahiro Sato
• 通讯作者: Masahiro Sato

NMR relaxation rate in the field-induced octupolar liquid phase of spin-1/2 J1-J2 frustrated chains

自旋 1/2 J1-J2 受挫链场诱导八极液相中的 NMR 弛豫率

• DOI: 10.1088/1742-6596/320/1/012014
• 发表时间: 2011
• 期刊: Journal of Physics : Conference Series
• 作者: M.Sato;T.Hikihara;T.Momoi
• 通讯作者: T.Momoi