NMR and mu-SR study on the critical phenomena in the Bose-glass phase with Tc=0

Tc=0时玻色玻璃相临界现象的NMR和mu-SR研究

• 批准号: 21540344
• 负责人: GOTO Takayuki
• 金额: $ 3万
• 依托单位: Sophia University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 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-21540344/
• 关键词: ボースグラス; NMR; μSR; 量子スピン系; 量子スピン; スピンギャップ; 不純物誘起磁気転移

(CH_3)_2CHNH_3Cu(Cl_xBr_<1-x>)_3 abbreviated IPACu(Cl_xBr_<1-x>)_3 is a mixed system of spin-gap compounds IPACuCl_3 and IPACuBr_3. This mixed system is reported by macroscopic measurements to show a magnetic order when the value of x is between the quantum critical points(QCPs) 0.44 and 0.87. We have investigated microscopically the ground state of the samples x=0.40, 0.45 and 0.50 which are located near the QCP of xc=0.44, by Muon Spin Relaxation(μSR) and NMR measurements. For x=0.40, mSR measurements in zero and longitudinal fields have shown that the spin fluctuation shows a significant slowing down with decreasing temperature, although the magnetic order does not appear down to T=15 mK, indicating that the ground state is an exotic one rather than a gapped one. For x=0.45 and 0.50, mSR and NMR measurements do not show any magnetic order at low temperatures, indicating that the QCP is larger than the reported value of x_c=0.44.

(CH_3）_2CHNH_3Cu（Cl_xBr_<1-x>）_3简称IPACu（Cl_xBr_<1-x>）_3，是一个由IPACuCl_3和IPACuBr_3组成的混合体系。这种混合系统的宏观测量报告显示磁序时，x的值之间的量子临界点（QCP）0.44和0.87。我们用μ子自旋弛豫（μSR）和核磁共振（NMR）测量，对位于xc=0.44的QCP附近的x= 0.40，0.45和0.50的样品的基态进行了微观研究。对于x=0.40，在零场和纵向场的mSR测量表明，自旋涨落随温度的降低而显着减慢，尽管磁序在T=15 mK时没有出现，这表明基态是一个奇异的而不是带隙的。当x=0.45和0.50时，mSR和NMR测量在低温下没有显示任何磁序，表明QCP大于文献报道的x_c=0.44。

项目成果

Pressure-induced new magnetic phase in T1(Cu0.985Mg0.015)Cl3 probed by muon spin Rotation

通过 μ 子自旋旋转探测 T1(Cu0.985Mg0.015)Cl3 中压力诱导的新磁性相

• 发表时间: 2010
• 期刊: J.Phys.: Conf.Series
• 作者: Takao Suzuki;Isao Watanabe;Fumiko Yamada;Motoki Yamada;Yasuyuki Ishii;Takayuki Kawamata;Takayuki Goto;Hidekazu Tanaka
• 通讯作者: Hidekazu Tanaka

Quantum critical behavior in highly random systems Tl_<1-x> K_xCuCl_3 probed by zero and longitudinal-fie ld muon-spinrelaxation(μSR) measurements

通过零和纵场 μ 子自旋弛豫 (μSR) 测量探测高度随机系统 Tl_<1-x> K_xCuCl_3 中的量子临界行为

• DOI: 10.1103/physrevb.79.104409
• 发表时间: 2009
• 期刊: Phys. Rev
• 作者: Takao Suzuki;Fumiko Yamada;Takayuki Kawamata;Isao Watanabe;Takayuki Goto and Hidekazu Tanaka
• 通讯作者: Takayuki Goto and Hidekazu Tanaka

Bond-randomness effect on the quantum spin system Tl_<1-x> K_xCuCl_3 probed b y muon-spin-relaxation method

μ子自旋弛豫法探测量子自旋体系Tl_<1-x> K_xCuCl_3的键随机效应

• DOI: 10.1016/j.physb.2008.11.108
• 发表时间: 2009
• 期刊: Physica
• 作者: Takao Suzuki;Fumiko Yamada;Isao Watanabe;Takayuki Goto;Akira Oosawa and Hidekazu Tanaka
• 通讯作者: Akira Oosawa and Hidekazu Tanaka

NMR study on Ru-based quantum spin systems of [Ru (acac) 3] and [{Ru(acac) 2} 2(m-OEt) 2]

[Ru (acac) 3] 和 [{Ru(acac) 2} 2(m-OEt) 2] 钌基量子自旋体系的核磁共振研究

• 发表时间: 2011
• 作者: S. Nakajima;M. Masuko;A. Oosawa;T. Goto;T. Hashimoto;A. Endo;and T. Hayashita
• 通讯作者: and T. Hayashita

μSR study on the ground state of bond-disordered spin gap system(CH_3)_2CHNH_3Cu(Cl<1-x> Br_x)_3(x=0.95, 0.88)

键无序自旋间隙体系(CH_3)_2CHNH_3Cu(Cl<1-x>Br_x)_3(x=0.95, 0.88)基态的μSR研究

• DOI: 10.1088/1742-6596/200/2/022011
• 发表时间: 2010
• 期刊: J. Phys.: Conf
• 作者: T. Goto;T. Suzuki;S. Nakajima;K. Kanada;T. Saito;A. Oosawa;I. Watanabe;H. Luetkens;A. Amato
• 通讯作者: A. Amato