The formation of long-lived spin magnetoexcitons is found in strongly interacting two-dimensional electronic systems. Measurements are carried out using the method of resonant inelastic light scattering on ZnO/MgZnO samples in the quantum-Hall-effect regime. Macrofilling of the long-lived excitation level is detected on the base of the giant anti-Stokes component of inelastic light scattering at a spin exciton under conditions of a ferromagnetic phase transition at a filling factor of 2. At a temperature of about 0.35 K, the intensity of this spectral line is more than 11 orders of magnitude higher than the intensity expected due to the thermal activation of spin excitons. The conclusion about the existence of long-lived excitations is made based on analysis of the anti-Stokes scattering data obtained at different pump powers and temperatures of the system. The formation of long-lived excitations is presumably the consequence of a modification in the spin-exciton dispersion law under phase-transition conditions.

在强相互作用的二维电子系统中发现了长寿命自旋磁激子的形成。在量子霍尔效应状态下，使用对 ZnO/MgZnO 样品进行共振非弹性光散射的方法进行测量。在填充因子为 2 的铁磁相变条件下，在自旋激子处非弹性光散射的巨大反斯托克斯分量的基础上检测到长寿命激发能级的宏观填充。在大约 0.35 K 的温度下，由于自旋激子的热激活，该谱线的强度比预期的强度高 11 个数量级以上。基于对不同泵功率和系统温度下获得的反斯托克斯散射数据的分析，得出了长寿命激发存在的结论。长寿命激发的形成可能是相变条件下自旋激子色散定律修改的结果。