论文标题
二维（pea）中电子的连贯旋转动力学$ _ 2 $ pbi $ _4 $ perovskites
Coherent Spin Dynamics of Electrons in Two-Dimensional (PEA)$_2$PbI$_4$ Perovskites
论文作者
论文摘要
铅卤化物钙钛矿和二维材料的多功能潜力在具有出色的光学特性的ruddlesen-popper perovskites中合并。在这里，Ruddlesen-Popper（PEA）中的连贯旋转动力学$ _ 2 $ PBI $ _4 $ PEROVSKITE由Picsecond Pump-Probe-probe kerr旋转在外部磁场中。鉴定出具有190〜PS的自旋倾向时间的居民电子的Larmor自旋进动。通过自旋惯性方法测得的弱磁场中的纵向自旋松弛时间长达25〜 $μ$ s。 Electron $ g $ factor的显着各向异性，平面价值为$+2.45 $，平面外值$+2.05 $。通过磁磁反射性，激子外面$ g $ factor的衡量为$+1.6 $。这项工作有助于理解二维钙钛矿及其自旋动态的自旋依赖性特性。
The versatile potential of lead halide perovskites and two-dimensional materials is merged in the Ruddlesen-Popper perovskites having outstanding optical properties. Here, the coherent spin dynamics in Ruddlesen-Popper (PEA)$_2$PbI$_4$ perovskites are investigated by picosecond pump-probe Kerr rotation in an external magnetic field. The Larmor spin precession of resident electrons with a spin dephasing time of 190~ps is identified. The longitudinal spin relaxation time in weak magnetic fields measured by the spin inertia method is as long as 25~$μ$s. A significant anisotropy of the electron $g$-factor with the in-plane value of $+2.45$ and out-of-plane value of $+2.05$ is found. The exciton out-of-plane $g$-factor is measured to be of $+1.6$ by magneto-reflectivity. This work contributes to the understanding of the spin-dependent properties of two-dimensional perovskites and their spin dynamics.
