论文标题
基于合金的过渡金属二甲藻元化杂化剂中的自旋谷动力学
Spin-valley dynamics in alloy-based transition metal dichalcogenide heterobilayers
论文作者
论文摘要
范德华（Van der Waals）基于2D过渡金属二分法元素的杂词杂质者最近已被证明为潜在的valleytronic应用提供了稳健且长期寿命的山谷极化。然而，基本动力学中构成层的频带结构和对齐的作用仍然在很大程度上尚未探索。在这里，我们研究旋转 - 通过使用合金单层半导体设计的异性恋者中的Valley弛豫动力学。 Through a combination of time-resolved Kerr rotation spectroscopic measurements and theoretical modelling for Mo$_{1-x}$W$_{x}$Se$_2$/WSe$_2$ samples with different chemical compositions and stacking angles, we uncover the roles of interlayer exciton recombination and charge carrier spin depolarization in the overall valley dynamics.我们的结果提供了有关微观自旋的见解 - 范德华异质结构中的valley极化机制，以开发未来的2D Valleytronic设备。
Van der Waals heterobilayers based on 2D transition metal dichalcogenides have been recently shown to support robust and long-lived valley polarization for potential valleytronic applications. However, the role of the band structure and alignment of the constituent layers in the underlying dynamics remains largely unexplored. Here we study spin--valley relaxation dynamics in heterobilayers with different band structures engineered via the use of alloyed monolayer semiconductors. Through a combination of time-resolved Kerr rotation spectroscopic measurements and theoretical modelling for Mo$_{1-x}$W$_{x}$Se$_2$/WSe$_2$ samples with different chemical compositions and stacking angles, we uncover the roles of interlayer exciton recombination and charge carrier spin depolarization in the overall valley dynamics. Our results provide insights into the microscopic spin--valley polarization mechanisms in van der Waals heterostructures for the development of future 2D valleytronic devices.
