论文标题
观察稀释的Kitaev Honeycomb材料中的随机单线状态
Observation of a random singlet state in a diluted Kitaev honeycomb material
论文作者
论文摘要
我们报告了一项$^{35} $ Cl核磁共振（NMR）研究稀释后的Kitaev材料$α$ -RU $ _ {1-x} $ ir $ $ $ _x $ cl $ cl $ _3 $（$ x = 0.1 $ x = 0.1 $和$ 0.2 $和$ 0.2 $）稀释后，$^{35} $ cl光谱表现出异常的大型磁性不均匀性，该磁性不均匀性的温度低于Kitaev Exchange Energy量表。同时，$^{35} $ cl旋转式放松率$ t_1^{ - 1} $作为稀释和磁场的函数，散发出$ x_c \ \ 0.22 $的关键兴奋剂，在野外诱导的旋转缝隙和零磁场的磁性下降均同时抑制了较低的过程，而无需抑制了较低的过程，同时进行了新颖的启动。这些NMR的发现表明，在$α$ -ru $ _ {1-x} $ ir $ _x $ cl $ _3 $中稳定随机单元相位，这是由于稀释和交换挫败感在量子限制中的相互作用而引起的。
We report a $^{35}$Cl nuclear magnetic resonance (NMR) study of the diluted Kitaev material $α$-Ru$_{1-x}$Ir$_x$Cl$_3$ ($x=0.1$ and $0.2$) where non-magnetic Ir$^{3+}$ dopants substitute Ru$^{3+}$ ions. Upon dilution, the $^{35}$Cl spectra exhibit unusual large magnetic inhomogeneity, which sets in at temperatures below the Kitaev exchange energy scale. At the same time, the $^{35}$Cl spin-lattice relaxation rate $T_1^{-1}$ as a function of dilution and magnetic field unravels a critical doping of $x_c\approx 0.22$, towards which both the field-induced spin gap and the zero-field magnetic ordering are simultaneously suppressed, while novel gapless low-energy spin excitations dominate the relaxation process. These NMR findings point to the stabilization of a random singlet phase in $α$-Ru$_{1-x}$Ir$_x$Cl$_3$, arising from the interplay of dilution and exchange frustration in the quantum limit.
