We construct a two-orbital effective model for a ferromagnetic Kagome-lattice shandite, Co3Sn2S2, a candidate material of magnetic Weyl semimetals, by considering one d orbital from Co, and one p orbital from interlayer Sn. The energy spectrum near the Fermi level, and the configurations of the Weyl points, computed by using our model, are similar to those obtained by first-principles calculations. We show also that nodal rings appear even with spin–orbit coupling when the magnetization points in-plane direction. Additionally, magnetic properties of Co3Sn2S2 and other shandite materials are discussed.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)