ℤ-Classified Topological Phases and Bound States in the Continuum Induced by Multiple Orbitals.

ABSTRACT: ℤ-classified higher-order topological insulators (HOTIs) with chiral-symmetric higher-order topological phases protected by multipole chiral numbers (MCNs) have attracted extensive interest recently. However, how to design artificial ℤ-classified HOTIs with multiple topological phases remains an unresolved issue. Here, multiorbital degrees of freedom are introduced to acoustic crystals and the various methods of topological phase transitions are achieved for the orbital ℤ-classified HOTIs. Experimental results demonstrate the realization the coexistence of corner modes with distinct mechanisms within one single model. This provides a pathway for finding ℤ-classified with large MCNs independent of long-range coupling. Additionally, a universal approach is introduced here to fabricate topolo

SUBMITTER: Li SF 

PROVIDER: S-EPMC11905062 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature