标题： 锁定模式下电子自旋进动的双稳态离散化：一种Overhauser场迟滞现象 显示英文标题

标题： Discretizing the Bistability of Mode-Locked Electron Spin Precession: An Overhauser Field Hysteresis Manifestation

摘要： 通过脉冲光学泵浦的电子-核自旋相互作用已被发现可以极化核自旋系统，导致核自旋建立起一个称为Overhauser场的固有磁场。 研究表明，在负失谐周期性泵浦的硅掺杂GaAs中，Overhauser场存在滞后效应，该效应依赖于外加磁场的扫描方向。 尽管已经对表现出这种滞后的系统预测了双稳态锁模电子自旋进动频率模式，但尚未有关于实验观察到所述双稳态自旋进动模式的报道。 这封信详细描述了双稳态Overhauser场解的演变，导致在硅掺杂GaAs的负失谐光学激发中出现滞后效应，并研究了这种滞后效应对电子自旋系统的影响。 Overhauser场滞后效应在电子自旋系统中的一个表现是，在给定的外加磁场带宽内，双稳态锁模电子自旋进动模式被离散化。 提出了一种方法，用于优先访问给定外加磁场带宽内的两种不同且稳定的锁模自旋进动模式，这可能对利用电子和核自旋进行信息处理协议的社区具有兴趣。 显示英文摘要

摘要： Electron-nuclear spin interactions by pulsed optical pumping have been found to polarize the nuclear spin system, leading to the nuclei building up an intrinsic magnetic field known as the Overhauser field. Studies have indicated an Overhauser field hysteresis effect dependent on the sweep direction of an externally applied magnetic field in negatively detuned periodically pumped Si-doped GaAs. Although predictions of bistable mode-locked electron spin precession frequency modes have been made for systems exhibiting this hysteresis, there have been no reports on the experimental observation of said bistable spin precession modes. This letter details the evolution of bistable Overhauser field solutions leading to a hysteretic effect in negatively detuned optical excitation of Si-doped GaAs by magneto-optic pump-probe spectroscopy and investigates the resulting consequence of this hysteresis acting on the electron spin system. One manifestation of the Overhauser field hysteresis acting on the electron spin system leads to the discretization of bistable mode-locked electron spin precession modes within a given band of externally applied magnetic field. A method for preferentially accessing the two different and stable mode-locked spin precession modes within a given band of externally applied magnetic field is outlined, which may be of interest for communities utilizing electron and nuclear spins for information processing protocols.