论文标题
双层石墨烯的光学大厅响应：破碎的镜子对称晶格中手性杂交状态的表现
Optical Hall response of bilayer graphene: the manifestation of chiral hybridised states in broken mirror symmetry lattices
论文作者
论文摘要
了解管理分层材料光学活性的机制对于旨在操纵纳米级光的设备的设计至关重要。在这里，我们表明扭曲和滑动双层石墨烯都是手性系统，可以偏转线性极化光的极化。然而，只有扭曲的双层石墨烯支持圆形二色性。我们的计算方案基于时间依赖性的Schrödinger方程，特别有效地计算光导量张量。具体而言，它使我们能够展示杂交状态的手性，因为在双层晶格中，踢脚的高斯波数据包的轨迹的弯曲曲线。我们表明，非零的霍尔电导率是手性晶格中杂交状态的非癌状态表现的结果。我们还证明了电导率张量对扭角和滑动矢量的连续依赖性。
Understanding the mechanisms governing the optical activity of layered-stacked materials is crucial to the design of devices aimed at manipulating light at the nanoscale. Here, we show that both twisted and slid bilayer graphene are chiral systems that can deflect the polarization of linear polarized light. However, only twisted bilayer graphene supports circular dichroism. Our calculation scheme, which is based on the time-dependent Schrödinger equation, is particularly efficient for calculating the optical-conductivity tensor. Specifically, it allows us to show the chirality of hybridized states as the handedness-dependent bending of the trajectory of kicked Gaussian wave packets in bilayer lattices. We show that nonzero Hall conductivity is the result of the noncanceling manifestation of hybridized states in chiral lattices. We also demonstrate the continuous dependence of the conductivity tensor on the twist angle and the sliding vector.
