Quantum conductivity in the topological surface state in the SbV3S5 kagome lattice

Abstract

We have successfully predicted the local topological bands in the frustrated kagome lattice SbV₃S₅. An important future research direction is to raise the kagome band with novel co-existing strong nonlinear dispersion and strong cohesion due to the anisotropic inner field of kagome SbV₃S₅ to the Fermi level. The Z₂ topological index of T-invariant systems provides evidence for a σ_yz near the Fermi level that determines the quantum anomalous Hall state. This shows that the quantum anomalous Hall effect (QAHE) phase of the kagome lattice SbV₃S₅ has a weak topological stability that is sensitive to weak disorder and field interactions. Neighbouring van Hove singularities near the Fermi level induced a quantum anomalous Hall conductivity and charge density wave platform.