Multi-level chiral edge states in Janus M2XS2Se2 (M = V, Ti; X = W, Mo) monolayers with high Curie temperature and sizable nontrivial topological gaps

Janus single-layer M 2 XS 2 Se 2 (M = V, Ti; X = W, Mo) exhibit quantum anomalous Hall (QAH) effect with multi-level chiral edge states, providing an idea platform for the exploration of novel topological materials.