Topological/triplet superconductors with the emergence of equal-spin pairing and gapless surface states that provide a fertile platform to realize spin polarized supercurrent and Majorana fermions for quantum computing and superconducting spintronics, are of intense interest. Topological triplet superconductivity can arise at interfaces between singlet superconductors (e.g., Nb) and a normal metal (NM) such as a topological insulator, a Dirac/Weyl semimetal (DSM/WSM), or a magnetic material with inhomogeneous spin textures. Our first approach is to use antiferromagnetic WSM Mn3Sn which exhibits rich real space non-collinear spin textures with nearly zero net magnetization. We have already observed marked proximity effects in Mn3Sn/Nb, including reduced transition temperature and other unusual characteristics, suggestive of triplet pairing (unpublished). |
Superconducting proximity effect in topological kagome antiferromagnet Mn3Sn, T. R. Thapaliya, Sebastian Hurtado Parra, James M. Kikkawa, and S. X. Huang, to be submitted (2021).