  The possibility of dissipationless chiral edge states without the need of an
external magnetic field in the quantum anomalous Hall effect (QAHE) offers a
great potential in electronic/spintronic applications. The biggest hurdle for
the realization of a room-temperature magnetic Chern insulator is to find a
structurally stable material with a sufficiently large energy gap and Curie
temperature that can be easily implemented in electronic devices. This work
based on first-principle methods shows that a single atomic layer of V2O3 with
honeycomb-kagome (HK) lattice is structurally stable with a spin-polarized
Dirac cone which gives rise to a room-temperature QAHE by the existence of an
atomic on-site spin-orbit coupling (SOC). Moreover, by a strain and substrate
study, it was found that the quantum anomalous Hall system is robust against
small deformations and can be supported by a graphene substrate.
