“…Compared with bulk counterparts, 2D materials can be modified by various methods, such as surface engineering, 25,26 defect engineering, 27 strain engineering, 28 heterostructure engineering, 29,30 and composition engineering, 31 to achieve ideal properties for targeted applications. Although numerous investigations have been carried out on 2D metal oxide dihalides, 22,32–34 studies on the ferroelectricity of 2D metal sulfide dihalides are limited.…”