Conversion Rules for Weyl Points and Nodal Lines in Topological Media
Conversion Rules for Weyl Points and Nodal Lines in Topological Media
According to a widely held paradigm, a pair of Weyl points with opposite chirality mutually annihilate when brought together. In contrast, we show that such a process is strictly forbidden for Weyl points related by a mirror symmetry, provided that an effective two-band description exists in terms of orbitals with …