The spontaneously formed striped polarization nanodomain configuration of a PbTiO${_3}$/SrTiO${_3}$ superlattice transforms to a uniform polarization state under above-bandgap illumination with a time dependence varying with the intensity of optical illumination and a well-defined threshold intensity. Recovery after the end of illumination occurs over a temperature-dependent period of tens of seconds at room temperature and shorter times at elevated temperatures. A model in which the screening of the depolarization field depends on the population of trapped electrons correctly predicts the observed temperature and optical intensity dependence.

中文翻译：

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温度相关电子俘获动力学在 PbTiO3/SrTiO3 超晶格中光学驱动纳米域转变中的作用

PbTiO${_3}$/SrTiO${_3}$ 超晶格的自发形成的条纹偏振纳米域配置在带隙以上照明下转变为均匀偏振态，其时间依赖性随光学照明强度而变化，并且具有明确定义的阈值强度。光照结束后的恢复发生在室温下数十秒的温度相关时间段和高温下的较短时间段内。去极化场的筛选取决于被捕获电子的数量的模型正确预测了观察到的温度和光强度依赖性。