手性与动磁学
2024.06.20
投稿：龚惠英部门：理学院浏览次数：
活动信息
报告题目 (Title)：Chirality and Kinetomagnetism（手性与动磁学）
报告人 (Speaker)：Prof. Sang-Wook Cheong (Rutgers, The State University of New Jersey, USA)
报告时间 (Time)：2024年6月21日（周五）8:30-13:00
报告地点 (Place)：校本部 D413
邀请人 (Inviter)：任伟 教授
主办部门：理学院物理系
报告摘要：
Chirality, which arises from the breaking of mirror symmetries combined with any spatial rotations, plays a ubiquitous role in a wide range of phenomena, from the DNA functionality, vine climbing to the piezoelectricity of quartz crystals. It's important to note that chirality does not necessarily involve a screw-like twisting, and magnetic chirality means chirality in spin ordered states or mesoscopic spin textures. Despite being mathematically well-defined, the term "chirality" has been extensively used, often in confusing ways, in recent years. In steady states, chirality (C) does not change with time-reversal operation, while chirality prime (C') denotes the breaking of time-reversal symmetry in addition to broken all mirror symmetries, combined with any spatial rotations. Various examples of magnetic chirality and chirality prime and their emergent phenomena, such as self-inductance, directional nonreciprocity in magnetic fields, currentinduced magnetization, chirality-selective spin-polarized current, Schwinger scattering, magneto-optical Kerr effect, linear magnetoelectricity, and chiral tunneling will be discussed. Many of these phenomena can be understood with one hypothesis on “kinetomagnetism in chiral systems” that I will present. Some of these exotic phenomena have been recently observed, while many others require experimental confirmation in the future.
