论文标题
动力轴承绝缘子中的轴子表面波
Axionic surface wave in dynamical axion insulators
论文作者
论文摘要
三维拓扑绝缘子的电磁响应可以通过具有量化轴向场的有效轴突作用来描述。一旦时间反转和反转对称性都被打破，例如，在抗铁磁拓扑绝缘子中，轴支球场随着磁波动而变化。当耦合到电磁场时，动态轴向场会导致富裕的物理现象。在这里，基于修改后的麦克斯韦方程，我们揭示了一种外来类型的北极星激发的存在，称为表面轴心极化，它在动力轴绝缘子和介电之间的界面中传播。当掺杂动力学轴承绝缘子是金属的时，轴突 - 光子耦合和等离子体 - 光子耦合的共存将进一步产生混合的表面轴突等离子体极化。我们还提出了kretschmann-rether构型，以实验检测表面轴心极化。我们的结果提供了一种研究凝结物理学中轴心电动力学的替代方法。
The electromagnetic response of three-dimensional topological insulators can be described by an effective axion action with a quantized axion field. Once both time-reversal and inversion symmetries are broken, for example, in antiferromagnetic topological insulators, the axion field becomes dynamical along with magnetic fluctuations. The dynamical axion field, when coupled to electromagnetic fields, can lead to rich physical phenomena. Here, based on the modified Maxwell's equations, we reveal the existence of an exotic type of polariton excitation, termed a surface axion polariton, which propagates in the interface between a dynamical axion insulator and a dielectric. When doping the dynamical axion insulator to be metallic, the coexistence of axion-photon coupling and plasmon-photon coupling will further generate a mixed surface axion plasmon polariton. We also propose a Kretschmann-Raether configuration to experimentally detect the surface axion polariton. Our result provides an alternative way to study the axion electrodynamics in condensed matter physics.
