Superconductivity under Pressure in Bilayer T_d-MoTe₂

In van der Waals (vdW) layered materials, tuning of the stacking order can have significant influence on the electronic band structure and transport properties. Interestingly, an unconventional tilted Ising superconductivity was found in bilayer T_d-MoTe₂, which stems from the breaking of inversion symmetry in bilayer T_d-structure. This raises an intriguing question: how would superconductivity change if we were to tune the interlayer coupling within this non-centrosymmetric bilayer system? In this presentation, we will demonstrate our exploration of the pressure effects on superconducitivity in bilayer MoTe₂. We investigate the evolution of superconductivity phase diagrams under pressure up to 2.5 GPa with control over carrier doping, displacement field, magnetic field, and temperature. We found two dome-shaped superconducting regions with respect to doping carrier densities. The two superconducting domes peak at different pressures, suggesting a complex interplay between superconductivity, interlayer coupling, and charge transfer. Our work establishes MoTe₂ as an important platform for the exploration of mechanisms underlying the superconductivity and interlayer coupling in layered TMDs and beyond.