论文标题
沮丧的kagome晶格反铁磁铁中线性自旋理论的崩溃和旋子结合状态的存在
Breakdown of Linear Spin-wave Theory and Existence of Spinon Bound States in the Frustrated Kagome Lattice Antiferromagnet
论文作者
论文摘要
使用高分辨率，飞行时间非弹性中子散射研究了Spin-1/2 Kagome晶格晶格抗Fiferromagnet CS $ _2 $ _2 $ _3 $ _3 $ _3 $ _ {12} $。平坦模式是沮丧的kagome抗fiferromagnet的特征，以及以镁为主导的低能分散模式，可以通过线性自旋波理论很好地描述。但是，该理论无法描述9至14 MEV之间的三种弱分散模式。这些模式可以归因于两翼型结合的状态，这些状态腐烂到远离区域中心和高温下的自由旋转状态，从而导致连续散射。
Spin dynamics of the spin-1/2 kagome lattice antiferromagnet Cs$_2$Cu$_3$SnF$_{12}$ was studied using high-resolution, time-of-flight inelastic neutron scattering. The flat mode, a characteristic of the frustrated kagome antiferromagnet, and the low-energy dispersive mode, which is dominated by magnons, can be well described by the linear spin-wave theory. However, the theory fails to describe three weakly dispersive modes between 9 and 14 meV. These modes could be attributed to two-spinon bound states, which decay into free spinons away from the zone center and at a high temperature, giving rise to continuum scattering.
