Investigation of spin liquid state near the quantum critical point by high-pressure measurements of quantum kagome lattice antiferromagnets

通过量子戈薇晶格反铁磁体的高压测量研究量子临界点附近的自旋液态

• 批准号: 22540348
• 负责人: OKUBO Susumu
• 金额: $ 2.75万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22540348/
• 关键词: 磁性; フラストレーション; 量子相転移; 圧力下測定; スピン液体; カゴメ格子; スピンフラストレーション

To investigate spin-liquid state stability for Dzyaloshinski-Moriya (DM) interaction (antisymmetric exchange interaction), magnetic susceptibility measurements of quantum kagome antiferromagnets ZnCu_3(OH)_6Cl_2 (Herbertsmithite) and Cu_3V_2O_7(OH)_2・2H_2O (Volborthite) have been performed under high-pressure at low temperature. Quantum transition from spin-liquid state to Neel state in these systems cannot observed in high-pressure up to 7.9 kbar at low temperature down to 1.8 K. On the other hand, D terms of DM interaction in quantum-spin kagome like antiferromagnet Cu_2O(SO_4) (Dolerophanite), classical-spin kagome lattice antiferromagnet KCr_3(SO_4)_2(OH_6) (Cr-jarosite) and spin-liquid ground state honeycomb lattice antiferromagnet Bi_3Mn_4O_12(NO_3) have been estimated using high-frequency ESR measurements.

为了研究dzyaloshinski-moriya（DM）相互作用（反对称交换相互作用）的自旋 - 液态稳定性，量子kagome kagome抗fiferromagnets zncu_3（oh）_6cl_2（oh）_6cl_2（herbertsmithite）和cu_3v_2o_7（OH）_2o_2o（OH）_2O（OH）_2O（OH）_2H2 HES QUAGOME ANTCOMAGNETS的磁化易感性测量在低温下高压。 Quantum transition from spin-liquid state to Neel state in these systems cannot be observed in high-pressure up to 7.9 kbar at low temperature down to 1.8 K. On the other hand, D terms of DM interaction in quantum-spin kagome like antiferromagnet Cu_2O(SO_4) (Dolerophanite), classical-spin kagome lattice antiferromagnet KCr_3(SO_4)_2(OH_6) (Cr-jarosite) and spin-liquid ground state honeycomb lattice antiferromagnet Bi_3Mn_4O_12(NO_3) have been estimated using high-frequency ESR Measurements.

项目成果

Dzyloshinsky-Moriya Interaction Estimated by AFMR of Kagome Like Substance Cu_2O(SO_4)

Kagome 类物质 Cu_2O(SO_4) 的 AFMR 估计的 Dzyloshinsky-Moriya 相互作用

• DOI: 10.1088/1742-6596/400/3/032097
• 发表时间: 2012
• 期刊: J. Phys.: Conf. Serie.
• 作者: N. Takahashi;S. Okubo;H. Ohta;T. Sakurai;M. Fujisawa;H. Kikuchi
• 通讯作者: H. Kikuchi

カゴメ格子磁性体 BaCu_3V_2O_8(OH)_2のサブミリ波 ESR III

Kagome晶格磁性材料BaCu_3V_2O_8(OH)_2的亚毫米级ESR III

• 发表时间: 2010
• 作者: K. Oka;T. Ito;H. Eisaki;M. Hase;T. Hamasaki;H. Kuroe and T. Sekine;張衛民,大久保晋,太田仁,友尾水樹,櫻井敬博,岡本佳比古,広井善二,吉田紘行
• 通讯作者: 張衛民,大久保晋,太田仁,友尾水樹,櫻井敬博,岡本佳比古,広井善二,吉田紘行

Origin of Field Induced Magnetic Ordering in Frustrated Honeycomb Lattice Antiferromagnet

受抑蜂窝晶格反铁磁体中场感磁有序的起源

• 发表时间: 2012
• 作者: S. Okubo;T. Ueda;W. Zhang;T. Sakurai;M. Fujisawa;H. Ohta;N. Ohnishi;M. Azuma;Y. Shimakawa;N. Kumada
• 通讯作者: N. Kumada

Anomalous Spin Dynamics Observed by High-Frequency ESR in Honeycomb Lattice Antiferromagnet InCu_<2/3>V_<1/3>O_3

高频ESR观察蜂窝晶格反铁磁体InCu_<2/3>V_<1/3>O_3中的反常自旋动力学

• DOI: 10.1143/jpsj.80.023705
• 发表时间: 2011
• 期刊: Journal of the Physical Society of Japan
• 影响因子: 1.7
• 作者: S.Okubo;H.Wada;H.Ohta;T.Tomita;M.Fujisawa;T.Sakurai;E.Ohmichi;H.Kikuchi
• 通讯作者: H.Kikuchi

Multi-Frequency ESR measurements of Frustrated Honeycomb Lattice Antiferromagnets

受抑蜂窝晶格反铁磁体的多频 ESR 测量

• 发表时间: 2011
• 作者: S. Okubo;Y. Yu;W. Zhang;T. Sakurai;M. Fujisawa;H. Ohta;H. Kikuchi;N. Ohnishi;M. Azuma;Y. Shimakawa;and N. Kumada;櫻井敬博;S. Okubo
• 通讯作者: S. Okubo