论文标题
ZRTE5在平面磁场下的非常规的光学选择规则
Unconventional optical selection rules in ZrTe5 under an in-plane magnetic field
论文作者
论文摘要
电子系统在磁场下的光学选择规则在确定其光学特性中起关键作用，从中可以从中得出带结构和基础对称性。在这封信中，基于描述ZRTE5的三维强拓扑绝缘子模型，我们研究了面积内磁场下的Landau水平（LLS）和磁光电导率。我们揭示在横向电导率RE（σ_{Zz}）中，非常规的光学选择规则N \ righatarrow n \ pm 2占主导地位，n为ll index。我们将非常规的选择规则归因于LLS携带的奇特的特殊分布，这是由亚米尔顿次米尔顿人的手性对称性产生的。此外，我们预测，如果将强的各向异性系统调谐为几乎各向同性，则LLS将重新分配，并且可以恢复常规选择规则N \ Rightarrow N \ PM 1。
The optical selection rules of an electron system under a magnetic field play key roles in determining its optical properties, from which the band structures and underlying symmetries can be derived. In this Letter, based on a three-dimensional strong topological insulator model describing ZrTe5,we study the Landau levels (LLs) and magneto-optical conductivity under an in-plane magnetic field. We reveal that in the transverse conductivity Re(σ_{zz}), the unconventional optical selection rules n\righatarrow n\pm 2 dominate, with n being the LL index. We attribute the unconventional selection rules to the peculiar distribution of parity carried by the LLs, resulting from the chiral symmetry of the sub-Hamiltonians. Moreover, we predict that, if the strong anisotropic system is tuned to be nearly isotropic, the LLs would redistribute and the conventional selection rules n\rightarrow n\pm 1 can be recovered.
