Fig. 1 | NPG Asia Materials

Fig. 1

From: Normal-to-topological insulator martensitic phase transition in group-IV monochalcogenides driven by light

Fig. 1

Atomically geometric phase transition of SnSe. Geometric structures of the SnSe compound in the a layered Pnma and b rocksalt \(Fm\bar 3m\) phases. In a, empty arrows represent the spontaneous electric polarization of each layer, and green arrows show the translation direction of each layer to form the \(Fm\bar 3m\) phase. The blue dashed rectangle represents the simulation supercell.

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