Fig. 3: The phase diagram of monolayer Td−MoTe2 in an x-directional magnetic field.

In the region between the in-plane upper critical field \({B}_{{{{\rm{c}}}}2}\left(T\right)\) (red dashed line) and the topological phase transition line (black solid line) in a, the superconducting monolayer Td−MoTe2 becomes a topological superconductor. b The BdG quasiparticle energy spectrum of a monolayer Td−MoTe2 ribbon along x. The applied x-directional magnetic field is \(B=2.1\Delta /\left(g{\mu }_{{{{\rm{B}}}}}\right)\).