Uniform Diffusion of Cooper Pairing Mediated by Hole Carriers in Topological Sb₂Te₃/Nb.

ABSTRACT: Spin-helical Dirac Fermions at a doped topological insulator's boundaries can support Majorana quasiparticles when coupled with s-wave superconductors, but in n-doped systems, the requisite induced Cooper pairing in topological states is often buried at heterointerfaces or complicated by degenerate coupling with bulk conduction carriers. Rarely probed are p-doped topological structures with nondegenerate Dirac and bulk valence bands at the Fermi level, which may foster long-range superconductivity without sacrificing Majorana physics. Using ultrahigh-resolution photoemission, we report proximity pairing with a large decay length in p-doped topological Sb₂Te₃ on superconducting Nb. Despite no momentum-space degeneracy, the topological and bu

SUBMITTER: Hlevyack JA 

PROVIDER: S-EPMC11562947 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature