#231Physics & AstronomyFront Page12 November 2025
Strain Unlocks Complex Topological Phonons in NiAsS
Researchers have identified NiAsS as an ideal material featuring a coexistence of multiple topological phonon states, including spin-1 Weyl, charge-2 Dirac, and nodal-surface phonons. Applying strain transforms these states, leading to the emergence of triangular Weyl complex phonons and establishing NiAsS as a paradigm platform for strain-tunable topological phononics and symmetry-controlled topological phase transitions.
By Lu, Cao, Liu, Cheng
