论文标题
使用椭圆极化的光线上的蜂窝晶格上的浮拓拓相阶段
Floquet topological phases on a honeycomb lattice using elliptically polarized light
论文作者
论文摘要
我们研究使用椭圆极化的光作为时间依赖的扰动，将二维蜂窝系统从平衡中驱逐出来的效果。特别是，当外部驱动器是$ {\ bf a}（t）=（a_ {0x} \ cos（ωt），a_ {0y} \ cos（ωt + ϕ_0））$时，我们尝试理解该驱动系统的拓扑相图。这些拓扑阶段的特征是浮子Chern数，在这些阶段中的每个阶段中，都与纳米替比上稳健的边缘模式的数量有关。我们表明，外部驱动器的比率$ a_ {0x}/a_ {0y} $是将系统从琐事带到拓扑阶段的可能方法，反之亦然。
We study the effect of driving a two-dimensional honeycomb system out of equilibrium using an elliptically polarized light as a time-dependent perturbation. In particular, we try to understand the topological phase diagram of this driven system when the external drive is a vector potential given by ${\bf A}(t) = (A_{0x} \cos(Ωt), A_{0y} \cos(Ωt + ϕ_0))$. These topological phases are characterized by the Floquet Chern number which, in each of these phases, is related to the number of robust edge modes on a nanoribbon. We show that varying the ratio $A_{0x}/A_{0y}$ of the external drive is a possible way to take the system from a trivial to a topological phase and vice versa.
