Mustafa Sarisaman, Sevval Tasdemir, Saber Rostamzadeh
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引用次数: 0
摘要
在这项研究中,我们利用拓扑韦尔半金属(TWSM)中的横向磁(TM)模式配置来研究频谱奇异性的拓扑特性。TM 模式配置限制了克尔/法拉第旋转的影响,因此不允许出现额外的自由度。我们发现,表面电流的产生是由于 TWSM 板表面的拓扑项,而该板表面没有费米弧定位。我们还研究了作为拓扑材料中轴子起源的 Θ 项,尤其是 b 项对拓扑特性的贡献。通过研究,我们首次清楚地揭示了 b 项的拓扑特性,并以明显的方式证明了韦尔退化情况。我们的系统在传播平面上产生环形电流,保持回旋运动的形状。b$项的存在使感应电流受到拓扑保护。我们的研究结果验证了含有两个相反手性 Weyl 费米子的 TWSM 的拓扑特性能够抵御外部影响。我们的研究结果证明了构建拓扑激光器的适当条件以及系统参数的取值。
Topological behavior of spectral singularities in topological Weyl semimetals.
In this study, we examine the topological character of spectral singularities by using transverse magnetic (TM) mode configuration in a Topological Weyl Semimetal (TWSM). TM mode configuration restrains the effect of Kerr/Faraday rotations and therefore does not allow an extra degree of freedom to occur. We find out that surface currents arise due to topological terms on the surface of TWSM slab where no Fermi arcs are localized. We also investigate the contribution of the Θ-term, which is the origin of axions in topological materials, and especially theb-term, to the topological properties. As a result of our study, we clearly reveal the topological character ofb-term for the first time and we demonstrate the Weyl degeneracy situation in an obvious manner. Our system produces circular currents in the plane of propagation, maintaining a cyclotron shape motion. The presence ofb-term causes the induced current to be topologically protected. Our findings verify that topological properties of TWSM containing two opposite chirality Weyl fermions are robust against external influences. With the findings of our study, the appropriate conditions for the construction of a topological laser and the values that the system parameters can take have been demonstrated.
期刊介绍:
Journal of Physics: Condensed Matter covers the whole of condensed matter physics including soft condensed matter and nanostructures. Papers may report experimental, theoretical and simulation studies. Note that papers must contain fundamental condensed matter science: papers reporting methods of materials preparation or properties of materials without novel condensed matter content will not be accepted.