Fig. 2: Geometric structures of free-standing monolayers and heterostructures.

a, b Top views of 2D VBi2Te4 and In2Se3 monolayers. c, d Side views of optimal configuration for the VBi2Te4/In2Se3 heterostructure with P↑ and P↓ states.
a, b Top views of 2D VBi2Te4 and In2Se3 monolayers. c, d Side views of optimal configuration for the VBi2Te4/In2Se3 heterostructure with P↑ and P↓ states.