Time-Reversal Invariant Topological Superconductivity in Quasi-One-Dimensional Structures

It is shown that a time-reversal invariant topological superconductivity can be realized in a quasi-onedimensional structure, which is fabricated by filling the superconducting materials into the periodic channel of dielectric matrices like zeolite and asbestos under high pressure. The topological superconducting phase sets up in the presence of large spin-orbit interactions when s-wave intra-wire and d-wave inter-wire pairings take place. Kramers pairs of Majorana bound states emerge at the edges of each wire. The time-reversal topological superconductor belongs to DIII class of symmetry with a Z2 invariant