论文标题
拓扑抗fiferromagnet MN3SN中固有异常霍尔效应的超快动力学
Ultrafast Dynamics of Intrinsic Anomalous Hall Effect in the Topological Antiferromagnet Mn3Sn
论文作者
论文摘要
我们研究了具有低于100 fs时间分辨率的拓扑抗铁磁铁MN3SN中异常霍尔效应（AHE）的超快动力学。光脉冲激发在很大程度上将电子温度升高到700 K，而Terahertz探测脉冲显然在脱离电磁之前清楚地抑制了对AHE的超快抑制。通过微观计算，内在的浆果膜机制可以很好地再现结果，而外在贡献则明显排除在外。我们的工作为研究非平衡性AHE的研究开辟了新的途径，以通过光严重控制电子温度来识别微观起源。
We investigate ultrafast dynamics of the anomalous Hall effect (AHE) in the topological antiferromagnet Mn3Sn with sub-100 fs time resolution. Optical pulse excitations largely elevate the electron temperature up to 700 K, and terahertz probe pulses clearly resolves ultrafast suppression of the AHE before demagnetization. The result is well reproduced by microscopic calculation of the intrinsic Berry-curvature mechanism while the extrinsic contribution is clearly excluded. Our work opens a new avenue for the study of nonequilibrium AHE to identify the microscopic origin by drastic control of the electron temperature by light.
