| Popis: |
The combination of band topology with magnetic ordering provides an excellent platform to realize various magnetic topological phases. Based on first-principle calculations and symmetry analysis, we predict that two distinct topological phases can be switched in the ferromagnetic material EuAgP by tuning the direction of magnetic moment. In the absence of spin-orbit coupling (SOC), the material is half-metallic with only one spin-up channel around the Fermi level, giving rise to a pair of triple points (TPs) along C6 axis, protected by the point group symmetry. As the magnetic moment is oriented along the z direction (with SOC included), the emergent TP in the absence of SOC splits into two Weyl points (WPs), featuring the nontrivial Fermi arcs on the side surface; however, when the magnetic moment is rotated to the x direction, a tiny band gap ( |
Full Text from ScienceDirect