Topological phase transition in a one-dimensional elastic string system

Ya Wen Tsai, Yao Ting Wang, Pi Gang Luan, Ta Jen Yen

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


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 exhibits the non-trivial interface mode in the domain wall between two periodic string composites.

Original languageEnglish
Article number313
Issue number6
StatePublished - Jun 2019


  • 1D crystals
  • String waves
  • Topological interface states
  • Zak phase


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