Symmetry-Protected Topological Triangular Weyl Complex
Symmetry-Protected Topological Triangular Weyl Complex
Weyl points are often believed to appear in pairs with opposite chirality. In this work, we show by first-principles calculations and symmetry analysis that single Weyl phonons with linear dispersion and double Weyl phonons with quadratic dispersion are simultaneously present between two specific phonon branches in realistic materials with trigonal …