Topological Phase Transition in a One-Dimensional Elastic String System

Ya-Wen Tsai, Yao-Ting Wang, Pi-Gang Luan, Ta-Jen Yen
2019 Crystals  
We show that topological interface mode can emerge in a one-dimensional elastic string system which consists of two periodic strings with different band topologies. To verify their topological features, Zak-phase of each band is calculated and reveals the condition of topological phase transition accordingly. Apart from that, the transmittance spectrum illustrates that topological interface mode arises when two topologically distinct structures are connected. The vibration profile further
more » ... ofile further exhibits the non-trivial interface mode in the domain wall between two periodic string composites.
doi:10.3390/cryst9060313 fatcat:boiuywzksbdqjlzyzgxvw6sgqu