[23a-A304-1~8] 22.1 Joint Session M "Phonon Engineering"

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[23a-A304-3] Simulation of higher-order topological modes in 3D phononic crystals with cubic lattice structure

〇Motonobu Tomoda¹, Kota Akiyoshi¹, Hayato Takeda¹, Osamu Matsuda¹ (1.Hokkaido Univ.)

Keywords:

topology,phononic crystals

The concept of "topological insulators" has extended beyond electronic properties in solid state physics and into classical mechanical physics. In this study, we drew inspiration from the correspondence between a one-dimensional mass-spring system in classical mechanics and the Su-Schrieffer-Heeger model in the electronic system. We proposed a phononic crystal structure in three dimensions that can exhibit topological edge states. By performing mechanical eigenstate analysis of that structure, we confirmed the emergence of higher-order topological modes as corner modes and hinge modes.