标题： 莫尔陈铁磁体的光开关 显示英文标题

标题： Optical Switching of Moiré Chern Ferromagnet

摘要： 光学操控量子物质提供了非接触、高精度和快速控制的方法。 在莫尔超晶格中的分数陈-铁磁态对于拓扑量子计算具有前景，但有效的光学控制协议仍然难以捉摸。 在这里，我们展示了使用圆偏振光在扭曲的MoTe2双层中对整数和分数陈-铁磁体进行鲁棒的光学切换。 在零磁场下，利用低至28纳瓦特每平方微米的泵浦光功率，实现了拓扑铁磁态中自旋取向的高度高效光学操控。 利用这种光学诱导的转变，我们还演示了磁双稳态循环和铁磁畴壁的空间分辨写入。 这项工作建立了一种可靠且高效的莫尔陈-铁磁体光学控制方案，为无耗散自旋电子学和量化陈结器件铺平了道路。 显示英文摘要

摘要： Optical manipulation of quantum matter offers a non-contact, high-precision and fast control. Fractional Chern ferromagnet states in moir\'e superlattices are promising for topological quantum computing, but an effective optical control protocol has remained elusive. Here, we demonstrate robust optical switching of integer and fractional Chern ferromagnets in twisted MoTe2 bilayers using circularly polarized light. Highly efficient optical manipulation of spin orientations in the topological ferromagnet regime is realized at zero field using a pump light power as low as 28 nanowatts per square micrometer. Utilizing this optically induced transition, we also demonstrate magnetic bistate cycling and spatially resolved writing of ferromagnetic domain walls. This work establishes a reliable and efficient optical control scheme for moir\'e Chern ferromagnets, paving the way for dissipationless spintronics and quantized Chern junction devices.