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Superconducting topological metals (SCTMs) have recently emerged as apromising platform of topological superconductivity (TSC) and Majorana zeromodes(MZMs) for quantum computation. Despite their importance in bothfundamental research and applications, SCTMs are very rare in nature. Inaddition, some superconductors with topological electronic structures have beenreported recently, but a feasible program to determine their TSC properties isstill lacking. Here, we propose a new strategy to design SCTMs by intercalatingthe superconducting units into the topological insulators. A program thatcharacterizes the superconducting BdG Chern number of 2D BdG Hamiltonian fromab initio calculations is also developed. Following this strategy,PdBi$_2$Te$_5$ and PdBi$_2$Te$_4$ are found to be experimentally synthesizableand ideal SCTMs. Chiral TSC could be realized in such SCTMs by incorporatingtopological surface states with Zeeman effect, which can be realized by anexternal magnetic field or in proximity to ferromagnetic (FM) insulator. Ourstrategy provides a new method for identifying the SCTMs and TSC candidates,and the program makes it possible to design and modulate the TSC candidatesfrom ab initio calculations.

Topological superconductor candidates PdBi$_2$Te$_4$ and PdBi$_2$Te$_5$ from a generic ab initio strategy