Quantum critical behavior in highly random systems Tl_<1-x> K_xCuCl_3 probed by zero and longitudinal-fie ld muon-spinrelaxation(μSR) measurements
Quantum critical behavior in highly random systems Tl_<1-x> K_xCuCl_3 probed by zero and longitudinal-fie ld muon-spinrelaxation(μSR) measurements
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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
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Takayuki Goto and Hidekazu Tanaka
中科院分区：
文献类型：
--
作者：
Takao Suzuki;Fumiko Yamada;Takayuki Kawamata;Isao Watanabe;Takayuki Goto and Hidekazu Tanaka
对引入无规性的量子自旋系统进行了零场和外场μ子自旋弛豫测量。根据测量结果，导出了μ子自旋弛豫率在磁场中的相对温度变化，它对应于广义动力学极化率的波矢积分。在3950 G时观察到了相对温度变化的峰结构，峰的温度随磁场的减小而降低。这种行为被解释为在量子临界点附近的自旋波的软模式。
Zero- and longitudinal-field muon-spin-relaxationmeasurements were carried out on the randomness-introduced quantum spin system. The relative temperature change in the muon-spin-relaxation ratein longitudinal-fields, which corresponds to the wave-vector integration of the generalized dynamical susceptibility, was deduced frommeasurements. Peak structure in the relative temperature change offoris observed atin 3950 G, and the temperature where the peak is observed decreases with decreasing the magnetic field. This behavior is interpreted as the soft mode of spin waves in the vicinity of the quantum critical point.