Orateur
Description
Transition metal dichalcogenides (TMDs) offer a highly tunable platform for investigating topological phases and unconventional superconductivity. In this talk, I will focus on hexagonally structured monolayers, where the heavy transition metal and the broken inversion symmetry give rise to Ising spin orbit coupling. I will begin by discussing a topological nodal superconducting phase predicted to appear under strong in-plane magnetic field. This phase hosts Majorana flat bands and leaves a distinctive imprint on the Josephson current-phase relation.
I will then turn to the role of Rashba spin–orbit coupling, whose strength can be tuned experimentally via gates. Although it breaks the chiral symmetry that protects the nodal phase, a residual mirror symmetry stabilizes a nodal crystalline superconducting phase with its own topological character.
Finally, I will present a topological superconducting phase arising in bilayer structures, where the topology can be controlled through an interlayer current. Taken together, these examples highlight the rich interplay between symmetry, topology, and tunability in TMD-based superconductors.