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.

该项目的目的是从理论上求解两个问题：表征磁性多极性状态和无序状态（例如旋转液体）的有效方法是什么？哪些系统适合这些新颖状态的实现？为此，我专注于磁铁和冷原子系统的现实模型。特别是，沮丧的Spin-1/2 J1-J2链的结果在此项目中是最重要的。我们已经准确地确定了具有载体 - 手续和新的Haldane-Dimer相的J1-J2链的丰富地面相图。 WEHAVE还表明，THETMR实现率和峰位置的场依赖性和峰位置的场相位散射光谱可以有效地使用J1-J2链中外部磁场诱导的多极性液相。

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

1次元スピン1/2冷却原子ガスの強磁性相における相関関数

一维自旋 1/2 冷却原子气体铁磁相的相关函数

• 发表时间: 2010
• 作者: 池田昌之;佐久間広展;多田隆治;高吉慎太郎
• 通讯作者: 高吉慎太郎