磁性外尔半金属球中的角动量转移
Angular Momentum Transfer in Magnetic Weyl Semimetal Spheres
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中文总结 AI 辅助
本研究在轴子电动力学框架下，计算点电荷存在时磁性外尔半金属球的电磁角动量，推导其机械角动量转化的角速度与角位移表达式，发现该角动量转移效应在外尔半金属中强于拓扑绝缘体。
中文摘要 AI 辅助
本工作在拓扑材料的轴子电动力学框架下研究电磁角动量问题。我们计算了点电荷存在时磁性外尔半金属球形样品的电磁角动量，随后分析通过准静态移动点电荷，电磁场中存储的角动量如何转化为球体的机械角动量，最终推导了所得角速度与角位移的解析表达式，证明该效应在外尔半金属中比拓扑绝缘体中更强。
英文摘要
In this work, we investigate the problem of electromagnetic angular momentum within the framework of topological materials, described by axion electrodynamics. Specifically, we calculate the electromagnetic angular momentum for a spherical sample of magnetic Weyl semimetal in the presence of a point charge. We then analyze how, by moving the point charge quasi-statically, the angular momentum stored in the electromagnetic field can be converted into mechanical angular momentum of the sphere. Finally, we derive analytical expressions for the resulting angular velocity and angular displacement, demonstrating that the effect is enhanced in the Weyl semimetal compared with a topological insulator.
