标题： 蜂窝状双层Wigner晶体的手性声子 显示英文标题

标题： Chiral phonons of honeycomb-type bilayer Wigner crystals

摘要： 我们从理论上研究了最近在层状过渡金属二硫属化物的范德瓦尔斯结构中发现的蜂窝状双层Wigner晶体的手性声子。这些手性声子可以在以下条件下出现：两层之间有效质量不平衡引起的反演对称性破缺，或者一层中的莫尔势；以及在施加磁场时实现的时间反演对称性破缺。考虑到层状材料的广泛可调性，可以通过改变系统参数来调节声子的频率和手性值。这些发现表明，双层蜂窝状Wigner晶体可以作为一个令人兴奋的新平台来研究手性声子。 显示英文摘要

摘要： We theoretically investigated the chiral phonons of honeycomb-type bilayer Wigner crystals recently discovered in van der Waals structures of layered transition metal dichalcogenides. These chiral phonons can emerge under the inversion symmetry breaking introduced by an effective mass imbalance between the two layers or a moir\'e potential in one layer, as well as under the time-reversal symmetry breaking realized by applying a magnetic field. Considering the wide tunability of layered materials, the frequencies and chirality values of phonons can both be tuned by varying the system parameters. These findings suggest that bilayer honeycomb-type Wigner crystals can serve as an exciting new platform for studying chiral phonons.