Heavy fermions in LiV2O4: Kondo compensation versus geometric frustration

Heavy fermions in LiV2O4: Kondo compensation versus geometric frustration
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LiV2O4 中的重费米子:近藤补偿与几何挫败

DOI:
10.1088/0953-8984/13/37/307
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发表时间:
2000
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
通讯作者:
S. Horn
S. Horn
中科院分区:
--
文献类型:
--
作者:
H. Kaps;M. Brando;W. Trinkl;N. Büttgen;A. Loidl;Ernst;M. Klemm;S. Horn

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对金属尖晶石 LiV2O4 进行低至 30 mK 的 7Li 核磁共振和热容测量。在30 mK≤T≤280 K的温度范围和4.6、10、44和83 kOe的外加磁场下研究了线宽、奈特位移和自旋晶格弛豫率的温度依赖性。发现纵向核磁化强度遵循拉伸指数形式弛豫,拉伸指数在0.5<β<1范围内。对于温度 T<1 K 和 4.6 kOe 的最低外加磁场,我们观察到自旋晶格弛豫率呈指数减慢,表现出 1 K 量级的阻碍势垒。这种激发能将完全受挫磁体的高度简并基态的不同配置分开。
7Li nuclear magnetic resonance and heat capacity measurements were performed on the metallic spinel LiV2O4 down to 30 mK. The temperature dependencies of the linewidth, the Knight shift and the spin-lattice relaxation rate were investigated in the temperature range 30 mK≤T≤280 K and at applied magnetic fields of 4.6, 10, 44 and 83 kOe. The longitudinal nuclear magnetization was found to relax following a stretched-exponential form with a stretching exponent in the range 0.5<β<1. For temperatures T<1 K and at the lowest applied magnetic field of 4.6 kOe, we observe a spin-lattice relaxation rate which slows down exponentially, exhibiting a hindering barrier of the order of 1 K. This excitation energy separates different configurations of a highly degenerate ground state of a completely frustrated magnet.
抑郁症的孤立有效一致性(i Coh)
DOI: --
发表时间: 2022
期刊:
影响因子: --
作者:
南翔太;加藤正樹;池田俊一郎;吉村匡史;上田紗津貴;越川陽介;嶽北佳輝;木下利彦;西田圭一郎
通讯作者: 西田圭一郎