Coupling topological surface states with superconductivity provides a powerful route to realizing a topological superconducting phase that can host Majorana zero modes and support fault-tolerant topological quantum computation. Here, we report proximity-induced two-dimensional superconductivity in a TaIrTe4/NbSe2 heterostructure, where superconductivity is induced into the surface of the type-II Weyl semimetal TaIrTe4. Differential resistance spectra reveal pronounced subgap oscillations, indicating multiple induced superconducting gaps associated with the coexistence of electron and hole Fermi pockets in TaIrTe4. The induced superconductivity exhibits strong anisotropy: while a modest out-of-plane magnetic field is sufficient to suppress the superconducting state, the in-plane upper critical field remains much higher and exceeds the Pauli limit below 2.7 K. Angular-dependent upper critical field measurements reveal a distinct Tinkham-like cusp, together with the Berezinskii–Kosterlitz–Thouless transition, confirming the two-dimensional nature of the induced superconductivity. These results establish TaIrTe4/NbSe2 heterostructure as a versatile platform for exploring superconductivity mediated by topological surface states in type-II Weyl systems.
Ren et al. (Mon,) studied this question.