【学术预告】 Revisiting the coupled oscillator - applications in spin cavitronics

发布时间:2019-12-26 南师物理学院 浏览次数:


报告专家:肖江
教授 博导
报告时间: 202017 周二上午10:00 AM
报告地点: 行健楼437
邀请单位: 物理科学与技术学院

专家简介
肖江教授,2001年本科毕业于北京大学物理系;2001-2006年就读美国佐治亚理工学院并获得应用数学硕士学位和物理学博士。2006-2009年在荷兰代尔伏特理工大学从事博士后研究。2009年回国加入复旦大学物理系。2017年入选国家优秀青年科学基金。主要从事自旋电子学理论方面的研究,在自旋转移力矩、自旋塞贝克效应、自旋泵浦效应等方面都做出过有影响力的工作。近期研究主要关注自旋波调控,旨在实现利用自旋波实现低能耗的非挥发性计算原理。最近的成果已发表在Phys. Rev. Lett, Phys. Rev. X, Phys. Rev. B, Nature Communications等期刊上。

报告摘要
Coupled harmonic oscillators appear repeatedly in a wide range of physical problems and are common fare in undergraduate physics. Can there be anything new in such a simple and well-studied system? In this talk, I will show that the physics of the coupled oscillators strongly depend on nature of the coupling force, which does not have to be conservative [1]. The coupling via non-conservative forces, or dissipative coupling, leads to dynamic behavior that may be very different from common expectations. After discussing the physics of dissipative coupling in mechanical oscillators and electronic RLC oscillators, I will demonstrate how it manifests itself in the field of spin cavitronics, which studies the interaction between the magnetic order and electromagnetic waves in microwave cavities.

参考文献
:
[1]. Yu, W., Wang, J., Yuan, H. Y. & Xiao, J. Prediction of Attractive Level Crossing via a Dissipative Mode. Phys. Rev. Lett. 123, 227201 (2019).