Quantum criticality of one-dimensional quantum magnets at ultralow temperatures and high magnetic fields

超低温高磁场下一维量子磁体的量子临界性

• 批准号: 20540352
• 负责人: TSUJII Hiroyuki
• 金额: $ 2.83万
• 依托单位: Kanazawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20540352/
• 关键词: 磁性; 物性実験; 低温物性; 量子スピン系; 量子臨界現象

Phase transitions and critical phenomena near the quantum critical point of one-dimensional quantum magnets have been investigated by means of specific-heat, magnetocaloric-effect, and magnetic-torque measurements. We have determined phase diagrams of a ladder antiferromagnet and an Ising-like linear-chain antiferromagnet. In addition, we have observed release of heat from hydrogen nuclear spins driven by quantum fluctuations near the quantum critical point.

通过比热、磁热效应和磁矩测量，研究了一维量子磁体在量子临界点附近的相变和临界现象。我们测定了梯形反铁磁体和类Ising线链反铁磁体的相图。此外，我们还观察到了在量子临界点附近由量子涨落驱动的氢核自旋的热释放。

项目成果

Investigation of the heavy fermion state and superconductivity in Pr1 − xLaxOs4Sb12 by the upper critical field slope at Tc

通过 Tc 时的上临界场斜率研究 Pr1 − xLaxOs4Sb12 中的重费米子态和超导性

• DOI: 10.1088/0953-8984/22/34/345701
• 发表时间: 2010
• 期刊: Journal of Physics: Condensed Matter
• 作者: B. Andraka;C. Rotundu;P. Kumar;H. Tsujii
• 通讯作者: H. Tsujii

Anisotropic magnetic phase diagram of the S=1/2 frustrated-chain antiferromagnet Cu_3(CO_3)_2(OH)_2

S=1/2挫链反铁磁体Cu_3(CO_3)_2(OH)_2的各向异性磁相图

• 发表时间: 2008
• 作者: 小林甫;谷口淳子;鈴木勝;三浦浩治;荒川一郎;今澤貴史;M.Suzuki;Y.Yoshida
• 通讯作者: Y.Yoshida

Magnetic phase diagram of the S = 1/2 antiferromagnetic ladder (CH3)2CHNH3CuCl3

• DOI: 10.1088/1742-6596/150/4/042217
• 发表时间: 2009-03
• 作者: H. Tsujii;Y. H. Kim;Y. Yoshida;Y. Takano;T. Murphy;K. Kanada;T. Saito;A. Oosawa;T. Goto

The dilute limit of heavy fermions: evidence of the coherent nature of CeAl3

重费米子的稀释极限：CeAl3 相干性质的证据

• DOI: 10.1088/0953-8984/21/49/495601
• 发表时间: 2009
• 期刊: Journal of Physics: Condensed Matter
• 作者: B. Andraka;C. Rotundu;Y. Takano;H. Tsujii
• 通讯作者: H. Tsujii

Magnetic susceptibility of PrMg_3 at ultra low temperatures

PrMg_3超低温磁化率

• 发表时间: 2009
• 期刊: Journal of Physics : Conference Series 150
• 作者: J.Yoshida;S.Abe;A.Tada;H.Tsujii;K.Matsumoto;H.Suzuki;H.S.Suzuki
• 通讯作者: H.S.Suzuki