The study of room temperature magnetic materials containing only p orbitals is a research hotspot in chemistry, physics, spintronics and materials science. Based on first-principles density functional theory together with tight binding methods, we predict a novel group of two dimensional (2D) X₃Y₂ (X = Na and K, YAs, Sb) lattices which possess quantum anomalous Hall effect (QAH), depending on the p orbitals of Y atoms. Especially, the nontrivial topology band gaps reach up to 112.7 meV for Na₃As₂ and 196.5 meV for Na₃Sb₂. The intrinsic QAH effect of X₃Y₂ have been verified by Chern number (C = 1) and the chiral edge states. We use a tight-binding model to understand the mechanism of QAH. The double exchange between Y anions, using p orbitals of X⁺ cation as bridges, can be understood the origin of magnetic properties. Besides, the H-terminated Si(111) is a good candidate substrate to support the films without destroying their QAH effect. X₃Y₂ lattice possesses QAH phase, which indicates it has a promising future in spintronic devices.

仅包含p轨道的室温磁性材料的研究是化学，物理学，自旋电子学和材料科学的研究热点。基于第一原理密度泛函理论和紧密结合方法，我们预测了一组具有量子异常霍尔效应（QAH ）的二维（2D）X ₃ Y ₂（X = Na和K，Y As，Sb）晶格），取决于Y原子的p轨道。特别地，对于Na ₃ As ₂，非平凡的拓扑带隙达到112.7 meV，对于Na ₃ Sb _2则达到196.5 meV 。X ₃ Y ₂的固有QAH效应已经通过Chern数（C = 1）和手性边缘态进行了验证。我们使用紧密绑定模型来了解QAH的机制。使用X ⁺阳离子的p轨道作为桥的Y阴离子之间的两次交换，可以理解为磁性的起源。此外，氢封端的Si（111）是支撑薄膜而不破坏其QAH效应的良好候选衬底。X ₃ Y ₂晶格具有QAH相，这表明它在自旋电子器件中具有广阔的前景。