Magneto-optical effects, which originate from the interactions between light and magnetism, have provided an important way to characterize magnetic materials and hosted abundant applications, such as light modulators, magnetic field sensors, and high-density data storage. However, such effects are too weak to be detected in non-magnetic materials due to the absence of spin degree of freedom. Here, we demonstrated that applying a perpendicular magnetic field can produce a colossal Raman scattering rotation in non-magnetic MoS₂, for A-mode representing the out-of-plane breathing vibration. Our experimental results show that linearly polarized scattering light is rotated by ∓125°, more apparent than the valley Zeeman splitting effect (∓1.2 meV) under the same experimental conditions (±5 T), near room temperature. A detailed and systematic analysis on the polarization-resolved magnetic field-dependent micro-zone Raman intensity offers a feasible way to manipulate the inelastically scattered light via a magnetic technique. This explored phenomenology and physical mechanism arouse a new ramification of probing burgeoning magneto-optical effects in the field of two-dimensional laminar materials.

中文翻译：

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通过 MoS2 单层中的磁场操纵拉曼散射旋转

源自光和磁相互作用的磁光效应为表征磁性材料提供了一种重要的方法，并承载了丰富的应用，例如光调制器、磁场传感器和高密度数据存储。然而，由于缺乏自旋自由度，这种效应太弱而无法在非磁性材料中检测到。在这里，我们证明了施加垂直磁场可以在非磁性 MoS _{2中产生巨大的拉曼散射旋转}，对于表示平面外呼吸振动的 A 模式。我们的实验结果表明，在接近室温的相同实验条件（±5 T）下，线偏振散射光旋转了∓125°，比谷塞曼分裂效应（∓1.2 meV）更明显。对偏振分辨磁场相关微区拉曼强度的详细和系统分析为通过磁技术操纵非弹性散射光提供了一种可行的方法。这种探索的现象学和物理机制引发了在二维层状材料领域探索新兴磁光效应的新分支。