As a milestone in the exploration of topological physics, Fermi arcs bridging Weyl points have been extensively studied. Weyl points, as are Fermi arcs, are believed to be only stable when preserving translation symmetry. However, no experimental observation of aperiodic Fermi arcs has been reported so far. Here, we continuously twist a bi-block Weyl meta-crystal and experimentally observe the twisted Fermi arc reconstruction. Although both the Weyl meta-crystals individually preserve translational symmetry, continuous twisting operation leads to the aperiodic hybridization and scattering of Fermi arcs on the interface, which is found to be determined by the singular total reflection around Weyl points. Our work unveils the aperiodic scattering of Fermi arcs and opens the door to continuously manipulating Fermi arcs.

作为拓扑物理探索的里程碑，桥接韦尔点的费米弧得到了广泛的研究。韦尔点和费米弧一样，被认为只有在保持平移对称性时才是稳定的。然而，迄今为止，尚未有关于非周期费米弧的实验观察报道。在这里，我们连续扭曲双块外尔超晶并通过实验观察扭曲的费米弧重构。尽管两个Weyl超晶都各自保持平移对称性，但连续的扭曲操作导致界面上费米弧的非周期杂化和散射，发现这是由Weyl点周围的奇异全反射决定的。我们的工作揭示了费米弧的非周期性散射，并为连续操纵费米弧打开了大门。