论文标题
观察Chern数量较大的Floquet拓扑阶段
Observation of Floquet topological phases with large Chern numbers
论文作者
论文摘要
Floquet Engineering最吸引人的优势之一是生成具有较大拓扑不变的新阶段。在这项工作中，我们在钻石的NV中心上实验模拟了定期淬火的广义haldane模型，并通过对动量空间中的静态和动态的自旋纹理进行想象，观察其Chern Number的Floquet Chern绝缘子阶段$ C = 1,2,4 $。我们的工作揭示了Floquet驱动器在变换系统拓扑并产生较大的Chern数字阶段的力量。它进一步建立了一个独特的实验方案，可以在两个及更高的空间维度中检测浮雕拓扑阶段。
One of the most intriguing advantage of Floquet engineering is to generate new phases with large topological invariants. In this work, we experimentally simulate a periodically quenched generalized Haldane model on an NV center in diamond, and observe its Floquet Chern insulator phases with Chern numbers $C=1,2,4$ by imaging the static and dynamic spin textures in momentum space. Our work reveals the power of Floquet driving in transforming system's topology and generating large Chern number phases. It further establishes a unique experimental scheme to detect Floquet topological phases in two and higher spatial dimensions.
