论文标题
Exchange-Split多个rydberg系列激素中的激光量二维res $ _ {2} $
Exchange-split multiple Rydberg series of excitons in anisotropic quasi two-dimensional ReS$_{2}$
论文作者
论文摘要
我们对Res $ _2 $的激子进行了极化分辨的磁发光研究。我们观察到两个线性极化的Rydberg系列激子伴随着另外两个Rydberg系列的深色激子，并由平面内磁场亮了。所有系列都推断到相同的单电子带隙，表明观察到的激子源自同一山谷或由反转对称性相关的两个山谷，并通过交换相互作用分裂。为了解释我们对磁性亮度的观察结果，我们必须假设主要的自旋轨道耦合是类似于的，它暗示了电子状态在Res $ _2 $中的近似对称性，该对称性比晶体对称性$ C_I $高。
We perform a polarization-resolved magnetoluminescence study of excitons in ReS$_2$. We observe that two linearly polarized Rydberg series of excitons are accompanied by two other Rydberg series of dark excitons, brightened by an in-plane magnetic field. All series extrapolate to the same single-electron bandgap, indicating that the observed excitons originate either from the same valley or from two valleys related by the inversion symmetry, and are split by exchange interaction. To interpret our observations of the magnetic brightening, we have to assume the dominant spin-orbit coupling to be Ising-like, which hints at an approximate symmetry of the electronic states in ReS$_2$ which is higher than the crystal symmetry $C_i$.
