Kagome铁磁体Fe$_3$Sn$_2$中的自旋波包：传播与前驱波
Spin wavepackets in the Kagome ferromagnet Fe$_3$Sn$_2$: propagation and precursors
AI总结：
该研究通过时间分辨光学测量发现Kagome铁磁体Fe₃Sn₂中自旋波包的自旋信息到达时间显著短于群速度预期值，揭示其源于光与特殊静磁模谱的相互作用，为长距离超快自旋波传输提供了新方向。
摘要：
磁有序系统中的自旋波传播已成为一种有望在长距离上传输量子信息的途径。通常认为，自旋波包在距离$d$处的到达时间由其群速度$v_g$决定。本文报道了对Kagome铁磁体Fe$_3$Sn$_2$中波包传播的时间分辨光学测量，结果表明自旋信息的到达时间显著短于$d/v_g$。我们发现，这种自旋波“前驱波”源于光与Fe$_3$Sn$_2$中特殊的静磁模谱的相互作用。相关效应可能对在铁磁和反铁磁系统中实现长距离、超快自旋波传输具有深远影响。
英文摘要：
The propagation of spin waves in magnetically ordered systems has emerged as a potential means to shuttle quantum information over large distances. Conventionally, the arrival time of a spin wavepacket at a distance, $d$, is assumed to be determined by its group velocity, $v_g$. He we report time-resolved optical measurements of wavepacket propagation in the Kagome ferromagnet Fe$_3$Sn$_2$ that demonstrate the arrival of spin information at times significantly less than $d/v_g$. We show that this spin wave "precursor" originates from the interaction of light with the unusual spectrum of magnetostatic modes in Fe$_3$Sn$_2$. Related effects may have far-reaching consequences toward realizing long-range, ultrafast spin wave transport in both ferromagnetic and antiferromagnetic systems.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
