电磁学中真的存在特勒根粒子吗？
Do the Tellegen particles really exist in electromagnetics?
摘要：
1948年，特勒根提出，将排列的电磁偶极子孪晶组装起来可以构造一种新型的电磁材料。然而，到目前为止，Tellegen媒体的创建问题是一个强烈讨论的主题。一个基本的对称性分析提出了质疑的想法，一个简单的组合两个（电和磁）偶极子实现本地材料与特勒根粒子作为结构元素。在本文中，我们表明，在他的搜索源与当地结的电和磁性能不能依赖于小电磁散射体的诱导参数。无近场电磁结构和点电荷的经典运动方程为实现具有局域结的电磁特性的源提供了物理基础。我们提出了一个假设，即局域磁电（ME）粒子应该是具有本征模振荡谱和非经典对称性破缺效应的物理对象。我们的研究令人信服地证明了这一假设。我们表明，准二维铁氧体磁盘磁偶极模式振荡的特点是独特的对称性与拓扑相位导致外观的ME属性。整个铁氧体圆盘可表征为具有本征电矩和磁矩的组合系统。这种粒子附近的场具有特殊的对称性。
英文摘要：
In 1948 Tellegen suggested that an assembly of the lined up electric-magnetic dipole twins can construct a new type of an electromagnetic material. Till now, however, the problem of creation of the Tellegen medium is a subject of strong discussions. An elementary symmetry analysis makes questionable an idea of a simple combination of two (electric and magnetic) dipoles to realize local materials with the Tellegen particles as structural elements. In this paper we show that in his search of sources with local junctions of the electrical and magnetic properties one cannot rely on the induced parameters of small electromagnetic scatterers. No near-field electromagnetic structures and classical motion equations for point charges give a physical basis to realize sources with the local junction of the electrical and magnetic properties. We advance a hypothesis that local magnetoelectric (ME) particles should be the physical objects with eigenmode oscillation spectra and non-classical symmetry breaking effects. Our studies convincingly prove this assumption. We show that a quasi-2D ferrite disk with magnetic-dipolar-mode oscillations is characterized by unique symmetry features with topological phases resulting in appearance of the ME properties. The entire ferrite disk can be characterized as a combined system with eigen electric and magnetic moments. The fields near such a particle are distinguished by special symmetry properties.
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