论文标题
结构障碍对Kitaev磁铁AG $ _ {3} $ liir $ _ {2} $ o $ $ _ {6} $的影响
Effect of structural disorder on the Kitaev magnet Ag$_{3}$LiIr$_{2}$O$_{6}$
论文作者
论文摘要
搜索具有任何兴奋和远距离纠缠的理想基塔夫旋转液体候选者，激发了一个新的插入式基塔夫磁铁的新家族，例如h $ _ {3} $ _ {2} ag $ _ {3} $ liir $ _ {2} $ o $ _ {6} $。已经提出了这些材料中磁熵的易感峰和两步释放，这是作为靠近基塔伊夫自旋液体的证据。在这里，我们介绍了两个Ag $ _ {3} $ _ {3} $ liir $ _ {2} $ o $ $ $ $ _ {6} $的磁化率，热容量和MUON自旋松弛（$μ$ SR）的比较研究。在无序极限下，易感性或热容量中没有峰值，而弱去极化$μ$ $ SR信号可能表明旋转液态基态。但是，在干净的极限中，我们解决了易感性和热容量数据的峰值，并观察到$μ$ SR的明显振荡，以确认远距离抗铁磁序列。 $μ$ SR振荡符合贝塞尔功能，这是不可兑换订单的特征，如父级化合物$α$ -li $ _ {2} $ iro $ $ $ _ {3} $中的报道。我们的结果阐明了结构障碍在插入的基塔夫磁铁中的作用。
Searching for an ideal Kitaev spin liquid candidate with anyonic excitations and long-range entanglement has motivated the synthesis of a new family of intercalated Kitaev magnets such as H$_{3}$LiIr$_{2}$O$_{6}$, Cu$_{2}$IrO$_{3}$, and Ag$_{3}$LiIr$_{2}$O$_{6}$. The absence of a susceptibility peak and a two-step release of the magnetic entropy in these materials has been proposed as evidence of proximity to the Kitaev spin liquid. Here we present a comparative study of the magnetic susceptibility, heat capacity, and muon spin relaxation ($μ$SR) between two samples of Ag$_{3}$LiIr$_{2}$O$_{6}$ in the clean and disordered limits. In the disordered limit, the absence of a peak in either susceptibility or heat capacity and a weakly depolarizing $μ$SR signal may suggest a proximate spin liquid ground state. In the clean limit, however, we resolve a peak in both susceptibility and heat capacity data, and observe clear oscillations in $μ$SR that confirm long-range antiferromagnetic ordering. The $μ$SR oscillations fit to a Bessel function, characteristic of an incommensurate order, as reported in the parent compound $α$-Li$_{2}$IrO$_{3}$. Our results clarify the role of structural disorder in the intercalated Kitaev magnets.
