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Title: Are vortex-core zero modes in FeTeSe Majorana modes
Plain: Microscope measurements on the iron-based superconductor FeTe0.55Se0.45 find zero-energy states in some magnetic vortices but not all, and whether they are Majorana modes is debated.
Precise: STM on FeTe_0.55Se_0.45 and related iron-based superconductors with topological surface states shows zero-bias peaks in a fraction of vortex cores. Determine whether these are Majorana zero modes of a topological surface superconductor, accounting for Te/Se disorder, local band inversion and vortex-vortex hybridization. An answer is yes or no, with the observed fraction explained by a quantitative model.
Settled by: Spatially resolved measurements linking zero-mode presence to local band inversion, with a conductance plateau at $2e^{2}/h$ on the zero mode.
Kind: well-posed
Answer type: yes-no
References: (empty)
Literature status: contested
Status note: Topological and trivial interpretations coexist as of 2026.
Posed since: 2018