论文标题
$α$ -rucl $ _3 $的高场阶段中磁激发的性质
Nature of Magnetic Excitations in the High-Field Phase of $α$-RuCl$_3$
论文作者
论文摘要
我们介绍了$α$ -RUCL $ _3 $的面积内晶体的综合电子自旋共振（ESR）研究，这是一种带有蜂窝结构的准二维材料，重点是其高场自旋动力学。测量在沿[110]和[100]方向施加的磁场中进行。检测到几种ESR模式。将我们的发现与最近的非弹性中子和拉曼散落数据相结合，我们确定了大多数观察到的激发。最重要的是，我们表明，磁性有序区域边界以外的低温ESR响应由单粒和两粒子过程以镁为基础激发为主。讨论了临界场附近激发光谱的特殊性。
We present comprehensive electron spin resonance (ESR) studies of in-plane oriented single crystals of $α$-RuCl$_3$, a quasi-two-dimensional material with honeycomb structure, focusing on its high-field spin dynamics. The measurements were performed in magnetic fields up to 16 T, applied along the [110] and [100] directions. Several ESR modes were detected. Combining our findings with recent inelastic neutron- and Raman-scattering data, we identify most of the observed excitations. Most importantly, we show that the low-temperature ESR response beyond the boundary of the magnetically ordered region is dominated by single- and two-particle processes with magnons as elementary excitations. The peculiarities of the excitation spectrum in the vicinity of the critical field are discussed.
