Single-electron charge transfer into putative Majorana and trivial modes in individual vortices.

ABSTRACT: Majorana bound states are putative collective excitations in solids that exhibit the self-conjugate property of Majorana fermions-they are their own antiparticles. In iron-based superconductors, zero-energy states in vortices have been reported as potential Majorana bound states, but the evidence remains controversial. Here, we use scanning tunneling noise spectroscopy to study the tunneling process into vortex bound states in the conventional superconductor NbSe₂, and in the putative Majorana platform FeTe_0.55Se_0.45. We find that tunneling into vortex bound states in both cases exhibits charge transfer of a single electron charge. Our data for the zero-energy bound states in FeTe_0.55Se_0.45 exclude the possibility of Yu-Shiba-Rusinov s

SUBMITTER: Ge JF 

PROVIDER: S-EPMC10247703 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature