物理学进展2024，Vol.44Issue(6)：293-308,16.DOI:10.13725/j.cnki.pip.2024.06.003
二维范德瓦耳斯反铁磁体系超快自旋动力学研究进展
Recent Progress in Ultrafast Spin Dynamics in Two-Dimensional van der Waals Antiferromagnets
摘要
Abstract
Antiferromagnets exhibit high-speed spin responses in the terahertz frequency range and robustness against external magnetic fields,making them promising for next-generation high-speed,high-density spintronic devices.Recently,two-dimensional van der Waals magnetic systems,which possess rich antiferromagnetic ground states,have gained sig-nificant attention and serve as ideal platforms for studying low-dimensional antiferromagnetic physics.Detecting and controlling ultrafast spin dynamics in two-dimensional antiferromag-netic systems will lay the foundation for high-speed spintronic device applications.Antiferro-magnets have no net macroscopic magnetization,making traditional optical methods,such as magneto-optical effects,challenging for detecting antiferromagnetic order in equilibrium states.However,in non-equilibrium states,the instantaneous magnetization generated by antiferro-magnetic spin dynamics allows the use of time-resolved magneto-optical Kerr effect to detect coherent spin precession in antiferromagnets.Additionally,techniques such as linear dichroism spectroscopy,terahertz emission spectroscopy,and second harmonic generation have been em-ployed in studying the dynamics of two-dimensional antiferromagnets.This paper introduces recent experimental progress on ultrafast spin dynamics in two-dimensional van der Waals antiferromagnetic systems,and briefly describes the coherent magnon excitations and corre-sponding mechanisms in two-dimensional antiferromagnets,including inverse magneto-optical effects/stimulated Raman scattering,orbital excitations,and exciton coupling.Furthermore,this paper discusses the critical slowing down of spin dynamics due to spin-lattice coupling effects and the amplification of coherent acoustic phonons.关键词
反铁磁体/范德瓦耳斯材料/自旋动力学/磁振子Key words
antiferromagnet/van der Waals material/spin dynamics/magnon分类
数理科学引用本文复制引用
李金阳,武方亮,张琦..二维范德瓦耳斯反铁磁体系超快自旋动力学研究进展[J].物理学进展,2024,44(6):293-308,16.基金项目
感谢国家重点研发计划项目(No.2020YFA0309200)的资助. （No.2020YFA0309200）
