论文标题
扭曲山谷处的偶极激子的异常磁光反应和手性界面
Anomalous magneto-optical response and chiral interface of dipolar excitons at twisted valleys
论文作者
论文摘要
在扭曲的双层过渡金属二核苷（TMD）中发现了针对偶极谷激子（TMD）的异常磁光谱，其中平面磁场诱导了光锥内部的exciton状态的相当多的多重型分裂。分裂分支的手性分散体使单向激子电流的有效光学注入可能。我们还发现一种模拟效应，具有适度的异质剂，代替了磁场，用于在光锥中引入大型分裂和手性分散体。可以通过应变来控制光注射激子流的角度取向，并通过圆形极化选择左右单向。
An anomalous magneto-optical spectrum is discovered for dipolar valley excitons in twisted double layer transition metal dichalcogenides (TMD), where in-plane magnetic field induces a sizable multiplet splitting of exciton states inside the light cone. Chiral dispersions of the split branches make possible efficient optical injection of unidirectional exciton current. We also find an analog effect with a modest heterostrain replacing the magnetic field for introducing large splitting and chiral dispersions in the light cone. Angular orientation of photo-injected exciton flow can be controlled by strain, with left-right unidirectionality selected by circular polarisation.
