论文标题
使用可调摩西的谐振光谱观察磁接近效应
Observation of Magnetic Proximity Effect Using Resonant Optical Spectroscopy of an Electrically Tunable MoSe$_2$/CrBr$_3$ Heterostructure
论文作者
论文摘要
结合二维磁和半导体层的范德华异质结构构成了接口磁性，电子和光学的有前途的平台。在这里，我们使用谐振光学反射光谱来观察栅极可调的摩西$ _2 $/crbr $ _3 $异构结构中的磁接近效应。界面的高质量导致摩西$ _2 $中K和K'Valley Exciton的巨大零场分裂，相当于12 t的外部磁场，具有弱但独特的电场依赖性，这暗示了对磁力化电气控制的潜力。磁接近效应使我们能够使用谐振光谱仪充分表征CRBR $ _3 $磁铁，从而确定易于轴的强制场，磁各向异性能量以及与旋转易感性和磁化强度相关的关键指数。
Van der Waals heterostructures combining two-dimensional magnetic and semiconducting layers constitute a promising platform for interfacing magnetism, electronics, and optics. Here, we use resonant optical reflection spectroscopy to the observe magnetic proximity effect in a gate-tunable MoSe$_2$/CrBr$_3$ heterostructure. High quality of the interface leads to a giant zero-field splitting of the K and K' valley excitons in MoSe$_2$, equivalent to an external magnetic field of 12 T, with a weak but distinct electric field dependence that hints at potential for electrical control of magnetization. The magnetic proximity effect allows us to use resonant optical spectroscopy to fully characterize the CrBr$_3$ magnet, determining the easy-axis coercive field, the magnetic anisotropy energy, and critical exponents associated with spin susceptibility and magnetization.
