Synthesis of Meta Symmetric 1T’‐WTe2 Using an Edge‐Induced Mechanism

Lattice symmetry is vital to the properties of two‐dimensional (2D) materials, yet their fixed symmetry cannot meet the increasing requirements in highly efficient and programmable electrical transport. If the structural diversity of 2D materials, as demonstrated by 1T’‐WTe₂, is improved without any phase transition or structural reconstruction, excellent metallic 1T’‐WTe₂ would be possibly used for integrated devices. Here, we realized meta symmetry of 1T’‐WTe₂ by using an edge‐induced mechanism, which is recognized as the combination of the intrinsic C_2v symmetry and sixfold axes. On account of the dynamically controlled growth, the meta symmetric 1T’‐WTe₂ with ~94.9% purity is obtained for the first time. Meta symmetry will also keep the intrinsic electrical properties of 1T’‐WTe₂ over the node. Such meta symmetry could not only enrich the structural diversity of 1T’‐WTe₂, but also be extended to other low‐symmetry 2D materials, which would be promising for customized circuits and devices.