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.

在量子反常霍尔效应 (QAHE) 中，无需外部磁场的无耗散手征边缘态的可能性在电子/自旋电子应用中提供了巨大的潜力。实现室温磁性陈绝缘体的最大障碍是找到一种结构稳定的材料，该材料具有足够大的能隙和居里温度，可以很容易地在电子设备中实现。这项基于第一性原理方法的工作表明，V ₂ O ₃的单个原子层具有蜂窝 - kagome（HK）晶格的结构稳定，具有自旋极化的狄拉克锥，通过原子现场自旋轨道耦合（SOC）的存在产生室温QAHE。此外，通过应变和衬底研究，发现量子反常霍尔系统对小变形具有鲁棒性，并且可以由石墨烯衬底支撑。