A symmetry-derived four-band k·p model with quadratic hybridization, obtained by Löwdin downfolding an 8×8 SOC parent Hamiltonian, reproduces the low-energy inverted bands of monolayer RuC and OsC near Γ.
Quan- tumspinhallstatesandtopologicalphasetransitioningermanene
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Symmetry-constrained low-energy effective Hamiltonian for topological RuC and OsC monolayers
A symmetry-derived four-band k·p model with quadratic hybridization, obtained by Löwdin downfolding an 8×8 SOC parent Hamiltonian, reproduces the low-energy inverted bands of monolayer RuC and OsC near Γ.