Symmetry-constrained low-energy effective Hamiltonian for topological RuC and OsC monolayers

A. Baradaran, O. Sedaghatfar

We derive a low-energy $\mathbf{k}\cdot \mathbf{p}$ effective Hamiltonian for monolayer osmium carbide (OsC) and ruthenium carbide (RuC) in a planar hexagonal configuration. First-p…