论文标题
观察杂交韦尔语音晶体中四倍的Weyl点
Observation of quadruple Weyl point in hybrid-Weyl phononic crystals
论文作者
论文摘要
Weyl半学的发现为搜索物理科学中的拓扑半学打开了大门。 Weyl点通常被认为是常规，二次，自旋1和高拓扑电荷的点。在这里，我们报告了四倍Weyl weyl点4的观察，最高的拓扑电荷可以携带两倍的退化节点。除了四倍的Weyl点外，音调半学还携带常规，二次和自旋1 Weyl点，它是具有最丰富类型的Weyl点的系统。证明了四螺旋体表面状态，特定于四倍的Weyl点。高电荷Weyl点的发现丰富了Weyl半法的知识，并可能刺激其他系统（例如光子，机械和冷原子系统）中的相关研究。
The discovery of Weyl semimetals opens the door for searching topological semimetals in physical science. The Weyl points are generally recognized as conventional, quadratic, spin-1, and those of high topological charges. Here we report the observation of the quadruple Weyl point of charge 4, the highest topological charge a twofold degenerate node can carry. Besides the quadruple Weyl point, the phononic semimetal also hosts conventional, quadratic, and spin-1 Weyl points, which stands as a system with yet the richest types of Weyl points. The quadruple-helicoid surface states, specific to the quadruple Weyl point, are demonstrated. The finding of the high-charge Weyl point enriches the knowledge of Weyl semimetals and may stimulate related researches in other systems, such as photonic, mechanical and cold atom systems.
