二维反铁磁材料的磁光研究进展  

Progress of Research on Two-dimensional Antiferromagnets with Magneto-optic Properties

作　　者：刘祺瑞 唐宇翔 韦可 江天[2] Liu Qirui;Tang Yuxiang;Wei Ke;Jiang Tian(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,Hunan,China;Institute for Quantum Science and Technology,College of Science,National University of Defense Technology,Changsha 410073,Hunan,China)

机构地区：[1]国防科技大学前沿交叉学科学院,湖南长沙410073 [2]国防科技大学理学院量子信息研究所,湖南长沙410073

出　　处：《中国激光》2023年第1期87-107,共21页Chinese Journal of Lasers

基　　金：国家自然科学基金(62075240,62105364);湖南省杰出青年科学基金(2020JJ2036);湖南省科技创新计划(2021RC2068);国防科技大学科研计划(ZK22-16)。

摘　　要：磁性材料独有的磁响应特性增强了传统电荷型器件的磁控能力,而超薄甚至可单原子层剥离的二维磁性材料在低维尺度下增强了电子自旋与电荷、晶格的相互作用并带来了非凡的物性。在自旋电子学中,反铁磁材料不仅展现了高频、低耗、抗串扰的优势,其与超导、磁相变等现象联系的关联电子态还疏通了人们利用光电子学探索低维磁性及其机理的道路。近年来,得益于额外的磁自由度、二维光电效应、反铁磁与铁磁/非磁材料的功能化异质结,激光驱动的二维反铁磁材料成为研究热点。综合稳态和瞬态的显微光学手段,回顾总结了二维反铁磁材料中的各类磁光效应和元激发准粒子研究,包括激光与物质相互作用中的载流子、激子、声子、磁子及其耦合态效应。随着可见光到太赫兹成像和其他配套技术的发展,二维反铁磁材料的检测和调控难题正逐步得到解决,高极化度和低阻尼输运的微纳自旋应用有望被植入到光伏、光信息处理领域并发挥重要作用。Significance Semiconductor microelectronics,which are based on the charge properties of electrons,have brought about revolutionary advancements to modern information technology.However,necessary improvements in the computing and information-processing capabilities of devices cannot only be achieved by manipulating and optimizing the charge properties of electrons.The manipulation of electronic spins,one of the most basic characteristics of magnetic materials,has enabled magnetic devices to become considerably successful,resulting in a series of cutting-edge applications with the advantages of nonvolatility and low-calorie requirements.Antiferromagnets,magnetic materials with the internal magnetic moment offset to zero,exhibit fascinating physical properties and have high application potential.First,the spin precession frequency resonant at the terahertz band of antiferromagnets has a higher spin storage density than that of ferromagnets.Second,the stray field of antiferromagnets is almost zero,which provides a strong ability to resist external interference.Third,antiferromagnets are often accompanied by many complex electronic states that give rise to some novel effects.However,owing to the characteristics of weak or zero net magnetic moments,the detection and regulation of antiferromagnetic materials have been challenging for a long time.In recent years,ultrathin and monolayer-exfoliated two-dimensional materials have provided new opportunities for research on antiferromagnets.The low-dimensional scale has improved the interaction among the lattice,electronic spin,and charge,which not only gives rise to complex and rich magnetic states but also paves the way for exploring lowdimensional magnetism and its applications by using interdisciplinary research fields such as optoelectronics.Research based on optical means has many advantages such as enabling microscopic-level,high-speed,noncontact,high-sensitivity analyses with a high space-time and high-energy resolution.In addition,it is conducive to the observation o

关 键 词：材料 二维反铁磁体 自旋 磁光效应 元激发准粒子 

分 类 号：O437[机械工程—光学工程]