Are the zero-energy vortex states in cobalt-doped BaFe2As2 true Majorana zero modes?

A more affirmative reading emphasizes a recent spectroscopic-imaging study of epitaxial Ba(Fe0.94Co0.06)2As2. It reports charge stripes inside vortices and claims that stripe registry creates distinct vortex classes, including integer-quantized core states hosting Majorana zero modes. This is a concrete material-specific mechanism, but the claim remains a recent research result rather than an established consensus.

• A recent study reports incommensurate charge stripes nucleated inside vortices of epitaxial cobalt-doped BaFe2As2 films.
• That study claims charge-order-dependent vortex classes, with some integer-quantized core states hosting a Majorana zero mode.
• The proposed distinction depends on the registry of vortex centers relative to the charge-stripe pattern, rather than on a zero-energy peak alone.
• Related iron-based-superconductor work has reported vortex zero modes with conductance close to or reaching the Majorana-associated quantized value, though in FeTe0.55Se0.45 rather than cobalt-doped BaFe2As2.

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