论文标题
二维量子旋转材料中的超快非平衡动力学
Ultrafast Nonequilibrium Dynamics in Two-dimensional Quantum Spin-Hall Materials
论文作者
论文摘要
我们开发了单层量子旋转霍尔绝缘子中非平衡超快光子学的理论框架，这些绝缘子支持多种拓扑状态。在这些材料中，飞秒量表中无处不在的强光相互作用导致非绝热量子动力学，从而导致拓扑依赖性的非线性光电传输现象。我们研究了驱动拓扑狄拉克·费米的机制，这些机制与强大的超短光脉冲相互作用，并发现了各种实验可访问的物理量，这些物理量从高谐波产生的光谱中编码量子材料的拓扑电子状态的指纹。我们的工作设定了理论基石，以实现时间分辨的谐波光谱的全部潜力，以识别二维量子旋转式固态系统中拓扑不变性。
We develop the theoretical framework of nonequilibrium ultrafast photonics in monolayer quantum spin-Hall insulators supporting a multitude of topological states. In these materials, ubiquitous strong light-matter interactions in the femtosecond scale lead to non-adiabatic quantum dynamics, resulting in topology-dependent nonlinear optoelectronic transport phenomena. We investigate the mechanism driving topological Dirac fermions interacting with strong ultrashort light pulses and uncover various experimentally accessible physical quantities that encode fingerprints of the quantum material's topological electronic state from the high harmonic generated spectrum. Our work sets the theoretical cornerstones to realize the full potential of time-resolved harmonic spectroscopy for identifying topological invariants in two-dimensional quantum spin-Hall solid state systems.
