Open access
Sep 2026
Acoustic mirror Hofstadter insulator with projective parity-time symmetry
In condensed matter physics, symmetry profoundly governs the fundamentals of topological matter. The emergence of new topological phase is typically linked to the enrichment of symmetries. Different parity-time symmetry relations (PT)2 = ± 1 distinguish between spinless and spinful physical systems. In spinless systems...
Xiao Xiang, Feng Gao, Cheng-Tai Hu et al.
· npj Acoustics · 0 citations