Weyl semimetals, which are a class of materials, have attracted extensive attention in condensed matter physics. In this letter, we report one-dimensional layered sonic crystals that exhibit many exotic properties. Based on our simulations, the results show that the synthetic Weyl points and their reflection phase have a vortex structure in this acoustic system. The nontrivial interface states, accompanying huge local-field enhancements, are also exhibited. Furthermore, we predict that the nodal lines in synthetic parameter space exist in simulations. Our results show the great potential of exploring Weyl semimetals in one-dimensional acoustic systems.

中文翻译：

---

声学合成参数空间中的外尔点和节点线

外尔半金属是一类材料，在凝聚态物理中引起了广泛的关注。在这封信中，我们报告了具有许多奇异特性的一维分层声波晶体。根据我们的模拟，结果表明合成外尔点及其反射相位在该声学系统中具有涡流结构。还展示了伴随巨大局部场增强的非平凡界面态。此外，我们预测合成参数空间中的节点线存在于模拟中。我们的结果表明在一维声学系统中探索外尔半金属的巨大潜力。