少层CrSBr中磁序的光控切换
Optical switching of magnetic order in few-layer CrSBr
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中文总结 AI 辅助
该研究展示了双层和三层CrSBr中磁序的光控切换，利用低功率连续波激光实现磁构型的局域、远程切换及零场磁构型的确定性制备，为磁光电子器件应用提供了基础。
中文摘要 AI 辅助
用光操控磁性对信息存储器件的基础理解和技术进步都至关重要。层状反铁磁体CrSBr属于近年新兴的二维范德华磁体类别，为通过磁激子实现磁学的光控提供了独特途径，磁激子可实现自旋排列的光学读出，同时提供强吸收通道。本文利用激子吸收和光致发光，展示了双层和三层CrSBr中磁序的光控切换；在近临界外磁场下，使用功率低至几微瓦的连续波激光，实现了延伸横向畴中磁构型的局域和远程切换，并进一步利用该机制确定性制备零场磁构型。研究结果证实光控切换是控制CrSBr磁性的有用手段，在磁光电子器件中具有潜在应用。
英文摘要
Manipulating magnetism with light is crucial for both fundamental understanding and technological advancements of information storage devices. The layered antiferromagnet CrSBr, part of the recently emerging class of two-dimensional van der Waals magnets, offers a unique path towards optical control of magnetism via magneto-excitons, which allow optical readout of the spin alignment and also provide a strong absorption channel. Here, we use exciton absorption and photoluminescence to demonstrate optical switching of the magnetic order in bi- and trilayer CrSBr. Using a continuous-wave laser with a power as low as a few microwatts at near-critical external magnetic fields, we demonstrate both local and remote switching of the magnetic configuration in extended lateral domains and further employ this mechanism to deterministically prepare the zero-field magnetic configuration. Our results establish optical switching as a useful means of controlling magnetism in CrSBr, with potential applications in magneto-optoelectronic devices.
