The two-dimensional (2D) materials are highly susceptible to the influence of their neighbors, thereby enabling the design by proximity phenomena. We reveal a remarkable terahertz (THz) spin-light interaction in 2D Dirac materials that arises from magnetic and spin-orbital proximity effects. The dynamical realization of the spin-charge conversion, the electric dipole spin resonance (EDSR), of Dirac electrons displays distinctive THz features upon emerging spin-pseudospin proximity terms in the Hamiltonian. To capture the effect of fast pseudospin dynamics on the electron spin, we develop a mean-field theory and complement it with a quantum-mechanical treatment. As a specific example, we investigate the THz response of a single graphene layer proximitized by a magnetic substrate. Our analysis demonstrates a strong enhancement and anomalous polarization structure of the THz-light absorption, which can enable THz detection and efficient generation and control of spins in spin-based quantum devices. The identified coupled spin-pseudospin dynamics is not limited to EDSR and may influence a broad range of optical, transport, and ultrafast phenomena.

中文翻译：

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邻近狄拉克材料中的太赫兹自旋光耦合

二维 (2D) 材料非常容易受到邻近材料的影响，从而可以通过邻近现象进行设计。我们揭示了二维狄拉克材料中由磁和自旋轨道邻近效应引起的显着的太赫兹（THz）自旋光相互作用。狄拉克电子的自旋电荷转换（电偶极子自旋共振（EDSR））的动态实现在哈密顿量中出现的自旋-赝自旋邻近项上显示出独特的太赫兹特征。为了捕捉快速赝自旋动力学对电子自旋的影响，我们开发了平均场理论并用量子力学处理对其进行补充。作为一个具体的例子，我们研究了邻近磁性基板的单个石墨烯层的太赫兹响应。我们的分析证明了太赫兹光吸收的强烈增强和反常偏振结构，这可以实现太赫兹检测以及基于自旋的量子器件中自旋的有效生成和控制。所确定的耦合自旋-赝自旋动力学不仅限于 EDSR，还可能影响广泛的光学、传输和超快现象。