AI 中文总结
该研究提出光诱导超晶格方法，通过双边缘模型揭示锯齿形石墨烯纳米带的准能隙谷反转特性，实现有限尺寸类狄拉克材料的谷选择性。
AI 中文摘要
结构化光为将空间图案化的弗洛凯电势印入量子材料提供了一种途径。作为一个具体例子，我们研究了由两束相干倾斜光束驱动的锯齿形石墨烯纳米带，其干涉产生周期性极化图案，进而形成光诱导超晶格。光场的周期性与纳米带宽度的匹配，使得准能谱出现两种 regime：匹配轮廓保留简并边缘分支，而失配轮廓则在宽纳米带中产生边界诱导能隙。我们提出了一种双边缘模型，通过残余杂化和边界采样光场来描述这种分裂。准能隙在谷之间反转，导致谷选择性边界响应。我们的研究表明，光诱导超晶格是一种灵活的方法，可通过可调边缘态准能分裂，实现有限尺寸类狄拉克材料的谷选择性。
英文摘要
Structured light provides a route to imprint spatially patterned Floquet potentials onto quantum materials. As a particular example, we study a zigzag graphene nanoribbon driven by two coherent tilted beams, whose interference creates a periodic polarization pattern that gives rise to a photo-induced superlattice. The matching between the periodicity of the optical field and the nanoribbon width leads to two regimes in the quasienergy spectrum: matched profiles preserve degenerate edge branches, while mismatched profiles yield a boundary-induced gap that survives in wide ribbons. We propose a two-edge model that captures this splitting through residual hybridization and the boundary-sampled optical field. The quasienergy gap reverses between valleys, leading to a valley-selective boundary response. Our results establish light-induced superlattices as a flexible method for valley selectivity in finite-size Dirac-like materials through tunable edge-state quasienergy splitting.
Comments14 pages, 9 figures
