论文标题
魔法双层语音石墨烯
Magic-angle Bilayer Phononic Graphene
论文作者
论文摘要
得益于最近在魔法双层石墨烯上发现的发现，Twistronics很快就成为了凝聚态物理学中新兴的领域。这封信通过引入扭曲的双层语音石墨烯，将Twistronics的领域扩展到声学上，这也显着携带了魔法角度，相关的Ultra-Flat乐队证明了这一点。除了模仿扭曲的双层石墨烯的量子机械行为外，我们还表明，它们的声学对应物还提供了一种更加简单，更健壮的方法，可以改变层间跳跃强度，使我们能够在古典扭曲的胆汁层中解锁魔法角度（> 3度）无法获得的魔法角度（> 3度）。这项研究不仅建立了扭曲（魔法）双层石墨烯的声学类似物，还提供了更容易访问的测试床，以探测堆叠的2D材料之间的相互作用和未对准，而且还指出了一种方向，向新的语音晶体设计范式指出了可能有益于增强的声音播放和启发性的新型语音晶体设计范式。
Thanks to the recent discovery on the magic-angle bilayer graphene, twistronics is quickly becom11 ing a burgeoning field in condensed matter physics. This letter expands the realm of twistronics to acoustics by introducing twisted bilayer phononic graphene, which remarkably also harbors the magic angle, evidenced by the associated ultra-flat bands. Beyond mimicking quantum mechanical behaviors of twisted bilayer graphene, we show that their acoustic counterpart offers a considerably more straightforward and robust way to alter the interlayer hopping strength, enabling us to unlock magic angles (> 3 degrees) inaccessible in classical twisted bilayer graphene. This study, not only establishes the acoustical analog of twisted (magic-angle) bilayer graphene, providing a testbed more easily accessible to probe the interaction and misalignment between stacked 2D materials, but also points out the direction to a new phononic crystal design paradigm that could benefit applications such as enhanced acoustic emission and sensing.
