Fig. 2: The crystal structure and electronic band structure of monolayer Td−MoTe2.

a The top view of the crystal structure for monolayer Td−MoTe2. The red dashed line labeled by My denotes the in-plane mirror symmetry. b Due to the nonalignment of the Te atoms in the vertical direction, an out-of-plane electric field Ez induces a net in-plane polar field. c The electronic band dispersions along Y-Γ-X-S for the monolayer Td−MoTe2. A z-directional electric field Ez = 0.1 V ⋅ Å−1 is considered in the DFT calculations. d The spin textures of the Γ centered hole pocket and the two flanking electronic pockets.