论文标题
多胎费米的浮雕工程
Floquet Engineering of Multifold Fermions
论文作者
论文摘要
使用Floquet理论，我们研究了光对三倍费米子的影响。我们研究了一个低能模型以及在照明下的简化紧密结合模型。我们发现，如果原始带结构在变性周围旋转对称，那么即使在施加光线后，这三倍退化仍然受到对称的保护。否则，光可以提高堕落性并张开差距。我们通过数值计算进一步研究了光对拓扑费米弧的影响。通过照明引起的变化反映在实验可检测到的特征中，例如我们计算的异常霍尔电导率。
Using Floquet theory, we investigate the effect of light on triple fold fermions. We study a low energy model as well as a simplified tight binding model under illumination. We find that the three fold degeneracy remains symmetry protected even after applying light if the original band structure is rotationally symmetric around the degeneracy. Otherwise, light can lift the degeneracy and open up a gap. We further investigate the effect of light on the topological Fermi arcs by means of numerical computations. The changes caused by illumination are reflected in experimentally detectable signatures, such as the anomalous Hall conductivity, which we calculate.
