论文标题
CSPB（CL，BR）中孔旋转连贯的模式锁定$ _ 3 $ perovskite纳米晶体
Mode locking of hole spin coherences in CsPb(Cl,Br)$_3$ perovskite nanocrystals
论文作者
论文摘要
带有密闭电子或孔的钙钛矿纳米晶体的旋转物理学引起了越来越多的关注，无论是针对基本研究和旋转的应用。在这里，稳定的CSPB（Cl $ _ {0.5} $ br $ _ {0.5} $）$ _ 3 $铅卤化物钙钛矿纳米晶体嵌入了荧光磷酸盐玻璃基质中，通过时间分解的光谱谱图揭示了与他们的相互作用的Spin Dynamics and Spins unteres unteremist and Spins $^$^$^$^$^$^$^$^$^$^$^。我们证明了通过在集合中每个纳米晶体中的单孔旋转的Larmor进动提供的自旋模式锁定效果，这些锁定是由外部磁场中的激光定期激发的。核引起的频率聚焦增强了模式锁定。纳秒的合奏旋转时间$ t_2^*$，测量$ t_2 = 13 \，$ ns的单孔旋转连贯时间。开发的理论模型对具有钙钛矿带结构的随机定向的纳米晶体的模式锁定和核聚焦进行了解释，很好地描述了实验数据。
The spin physics of perovskite nanocrystals with confined electrons or holes is attracting increasing attention, both for fundamental studies and spintronic applications. Here, stable CsPb(Cl$_{0.5}$Br$_{0.5}$)$_3$ lead halide perovskite nanocrystals embedded in a fluorophosphate glass matrix are studied by time-resolved optical spectroscopy to unravel the coherent spin dynamics of holes and their interaction with nuclear spins of the $^{207}$Pb isotope. We demonstrate the spin mode locking effect provided by the synchronization of the Larmor precession of single hole spins in each nanocrystal in the ensemble that are excited periodically by a laser in an external magnetic field. The mode locking is enhanced by nuclei-induced frequency focusing. An ensemble spin dephasing time $T_2^*$ of a nanosecond and a single hole spin coherence time of $T_2=13\,$ns are measured. The developed theoretical model accounting for the mode locking and nuclear focusing for randomly oriented nanocrystals with perovskite band structure describes the experimental data very well.
