Unconventional Topological Weyl Dipole Phonon.
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ABSTRACT: A pair of Weyl points (WPs) with opposite topological charges can exhibit an additional higher-order Z2 topological charge, giving rise to the formation of a Z2 Weyl dipole (WD). Owing to the nontrivial topological charge, Z2 WDs should also appear in pairs, and the WPs within each Z2 WD can not be annihilated when meeting together. As a novel topological state, the topological Weyl dipole (TWD) phase has garnered significant attention, yet its realization in crystalline materials remains a challenge. Here, through first-principles calculations and theoretical analysis, the existence of the nontrivial unconventional WD phase is demonstrated in the phonon spectra of the P63 type Y(OH)3. Particularly, the nontrivial unconventi
SUBMITTER: Wang J
PROVIDER: S-EPMC12407364 | biostudies-literature | 2025 Aug
REPOSITORIES: biostudies-literature
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