Procedural Determination of Novel Stoichiometric Topological Superconductors through Surface and Pressure Effects

Topological superconductors have attracted great interest as a groundbreaking platform to allow for fault-tolerant quantum computing and overcome the limitations of classical processors defined by Moore’s law. In this paper, we discover eight novel topological superconductors, ABX₂ (A=Bi, In; B=Nb, Ta; X=Se, S) and propose a new systematic method to realize topological superconductors by combining of transition metal dichalcogenides with spin-orbit post-transitional elements. These eight compounds are bulk superconductors with intrinsic topological surface states and can be realized without any tampering, a coveted quality for topological superconductors. Utilizing density functional theoretical calculations, we determined topological surface states and bulk superconductivity from the electronic band structures of our compounds. In addition, we demonstrated the robust nature of our materials under high-pressure conditions, as their non-trivial topology and superconductivity were maintained. Our eight novel compounds hold great promise towards the practical realization of fault-tolerant quantum computers through their ability to eliminate the longstanding problem of quantum decoherence within quantum computational systems.