Muon Spin Relaxation Evidence for the U(1) Quantum Spin-Liquid Ground State in the Triangular Antiferromagnet YbMgGaO4
Muon Spin Relaxation Evidence for the U(1) Quantum Spin-Liquid Ground State in the Triangular Antiferromagnet YbMgGaO4
复制标题
三角形反铁磁体 YbMgGaO4 中 U(1) 量子自旋液体基态的 μ 子自旋弛豫证据
DOI：
10.1103/physrevlett.117.097201
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发表时间：
2016-08-23
影响因子：
8.6
通讯作者：
Zhang, Qingming
中科院分区：
文献类型：
--
作者：
Li, Yuesheng;Adroja, Devashibhai;Zhang, Qingming
μ子自旋弛豫（mu SR）的结构完美的三角形反铁磁体YbMgGaO4单晶的实验表明，没有静态的长程磁序和自旋冻结到0.048 K在零场。低于0.4 K，mu（+）自旋弛豫率，这是正比于Yb 3+自旋的动态相关函数，表现出温度无关的平台。所有这些μ SR结果明确支持三角形反铁磁体YbMgGaO4中无带隙U（1）量子自旋液体基态的形成。
Muon spin relaxation (mu SR) experiments on single crystals of the structurally perfect triangular antiferromagnet YbMgGaO4 indicate the absence of both static long-range magnetic order and spin freezing down to 0.048 K in a zero field. Below 0.4 K, the mu(+) spin relaxation rates, which are proportional to the dynamic correlation function of the Yb3+ spins, exhibit temperature-independent plateaus. All these mu SR results unequivocally support the formation of a gapless U(1) quantum spin liquid ground state in the triangular antiferromagnet YbMgGaO4.