Topological Kondo Superconductors

Spin-triplet p-wave superconductors are promising candidates for topological superconductors. They have been proposed in various heterostructures where a strong spin-orbit interacting materials is coupled to a conventional s-wave superconductor by proximity effect. However, topological superconductors existing in nature and driven by strong electron correlations is yet to be studied. Here we propose a realization of such system in a class of Kondo lattice materials without proximity effect. Therein, the odd-parity Kondo hybridization mediates ferromagnetic spin-spin coupling and leads to spin-triplet resonant-valence-bond (t-RVB) pairing between local moments. Spin-triplet p ± ip′-wave topological superconductivity is reached when Kondo effect co-exists with t-RVB. We identify the topological nature by the non-trivial topological invariant and the Majorana fermions at edges. Experimental implications of our results on the U -based ferromagnetic heavy-electron superconductors with Kondo correlations, in particular UTe₂, is discussed