Spin liquid state inκ-(BEDT-TTF)2Cu2(CN)3 studied by muon spin relaxation method
Spin liquid state inκ-(BEDT-TTF)2Cu2(CN)3 studied by muon spin relaxation method
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DOI：
10.1007/bf02679485
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发表时间：
2006
影响因子：
2
通讯作者：
S. Ohira;Y. Shimizu;K. Kanoda;G. Saito
中科院分区：
文献类型：
--
作者：
S. Ohira;Y. Shimizu;K. Kanoda;G. Saito
采用μ子自旋弛豫（μSR）方法研究了具有近似各向同性三角晶格结构的有机Mott绝缘体κ-（ET）2Cu 2（CN）3的磁性.在零场μSR测量中，在20 mK以下没有观察到磁有序，表明自旋液体基态的实现。在ZF下没有观察到对应于在磁场下的13 C NMR研究中报告的线宽加宽的内部场分布的增强。自旋动力学的一个轻微的变化被检测到低于4 K。这种变化是相当小的，并从关键的慢下来的效果归因于一个磁过渡不同。
Magnetic properties of an organic Mott insulator with an approximately isotropic triangular lattice structure, κ-(ET)2Cu2(CN)3, are investigated by the muon spin relaxation (μSR) method. No magnetic ordering is observed down to 20 mK in the zero-field (ZF) μSR measurement, suggesting the realization of the spin liquid ground state. An enhancement of the distribution of internal fields, corresponding to broadening of the linewidth reported in the13C NMR study under magnetic fields, is not observed under ZF. A slight change in the spin dynamics is detected below 4 K. This change is quite small and different from the critical slow-down effect attributable to a magnetic transition.