AI 中文总结
本文以扭曲双层MoTe2为平台，研究陈能带中铁磁体非平衡自旋-谷动力学，发现陈磁畴与铁磁金属磁畴的消失机制截然不同，揭示了拓扑与强关联对该动力学的影响。
AI 中文摘要
理解远离平衡态的量子物质是现代物理学的核心目标。扭曲双层MoTe2结合了强库仑相互作用、非平庸能带几何与光学调控，是探索该前沿的理想平台。本文利用该体系研究陈能带中铁磁体非平衡动力学中拓扑与多体关联的作用：通过聚焦圆偏振光脉冲，生成与外磁场取向相反的局域磁畴，并在空间、时间分辨的低温实验中直接成像其后续的自旋-谷弛豫过程。研究表明，在整数和分数陈绝缘态附近，该动力学机制与铁磁金属存在本质差异：金属磁畴通过收缩消失，而陈磁畴通过热激活熔化，导致时间自旋演化显著不同，弛豫时间长数个数量级。这些发现证明了拓扑与强关联对远非平衡集体自旋相的影响，为量子霍尔区铁磁体的动力学调控开辟了新机遇。
英文摘要
Understanding quantum matter far from equilibrium is a central goal of modern physics. Twisted MoTe2 bilayers constitute a promising platform for exploring this frontier by combining strong Coulomb interactions, nontrivial band geometry, and optical control. Here, we exploit this setting to investigate the role of topology and many-body correlations in the out-of-equilibrium dynamics of ferromagnets in Chern bands. Using a focused circularly polarized light pulse, we create a local magnetic domain oriented opposite to an external magnetic field and directly image its subsequent spin-valley relaxation in spatially and time-resolved low-temperature experiments. We demonstrate that in the vicinity of both integer and fractional Chern insulating states, the dynamics is governed by qualitatively different mechanisms than in ferromagnetic metals. Whereas metallic domains collapse by shrinking, Chern domains melt via thermal activation, resulting in drastically different temporal spin evolution and orders-of-magnitude longer relaxation times. These findings demonstrate the influence of topology and strong correlations on far-from-equilibrium collective spin phases, opening new opportunities for dynamical control of ferromagnets in the quantum Hall regime.
CommentsMain text: 6 pages, 4 figures; Methods: 8 pages (+ 14 extended data figures)
