论文标题
发现狄拉克点的拓扑表面状态
Discovering topological surface states of Dirac points
论文作者
论文摘要
与Weyl材料不同，狄拉克材料在实验中尚未发现以支持固有的拓扑表面状态，因为现有系统中的表面弧对对称性呈现扰动不稳定。利用所提出的滑行和时间反向对称性，我们在理论上设计和实验验证了两个频率均匀的三维迪拉克点的声学晶体，并具有$ Z_2 $单子电荷和四个无间断的螺旋表面状态。
Dirac materials, unlike the Weyl materials, have not been found in experiments to support intrinsic topological surface states, as the surface arcs in existing systems are unstable against symmetry-preserving perturbations. Utilizing the proposed glide and time-reversal symmetries, we theoretically design and experimentally verify an acoustic crystal of two frequency-isolated three-dimensional Dirac points with $Z_2$ monopole charges and four gapless helicoid surface states.
