论文标题
在声学晶体中实现具有最大充电数的单重 - 韦尔语音子
Realization of the Single-pair-Weyl Phonons with the Maximum Charge Number in Acoustic Crystals
论文作者
论文摘要
在拓扑物理学领域，长期以来，观察具有最大电荷的Weyl Phonon（WP）并设计了仅包含单对WP的逼真的材料结构。在这里，我们成功设计了一个声学晶体，以首次实现最大电荷的单对WPS。我们对声带分散的理论模拟表明，受时间反转对称（$ \ cal t $）的保护和点组对称性，带有-4（$ \ nathcal {c} = -4 $）的wp，而$ \ \ \ nthcal {c} =+4 $的其他wp均与$ \ nmets的其他$ $其他相同，并且与其他相同的位置。一种WPS。此外，此处获得的Singe-pair-WPS是由最简单的两波段模式设计的，并且在实验中可以清楚地观察到相关的四螺旋体Fermi Acrs，因为它们不被任何散装带覆盖并被其他类型的WPS杂交。我们的理论结果提供了可靠的声学晶体，以研究单对WPS的拓扑特性，并为该领域的实验者提供了最大电荷。
To observe the Weyl phonon (WP) with the maximum charge and to design a realistic material structure containing only single-pair-WPs have long been considered two challenges in the field of topology physics. Here we have successfully designed an acoustic crystal to realize the single-pair-WPs with the maximum charge for the first time. Our theoretical simulations on acoustic band dispersions demonstrate that protected by the time-reversal symmetry ($\cal T$) and the point group symmetries, a WP with the charge -4 ($\mathcal{C}=-4$) and another WP with $\mathcal{C}=+4$ are located at the high-symmetry point $Γ$ and R, respectively, with the absence of any other kinds of WPs. Moreover, the singe-pair-WPs obtained here are designed by the simplest two-band mode, and the related quadruple-helicoid Fermi acrs can be observed clearly in experiments, since they aren't covered by any bulk bands and hybridized by other kinds of WPs. Our theoretical results provide a reliable acoustic crystal to study the topological properties of the single-pair-WPs with the maximum charge for experimentalists in this field.
