Figure 1
Self-assembled Fe chains on Pb(110). (a) Model of the experiment: topological superconducting phase arises when mono-atomic iron chains with spin texture are grown on an s-wave superconductor (here Pb(110)). MBSs are then localised at the end of the chain and experimentally observed as ZBP in the conductance. (b) Topographic STM image of iron chains self-assembled on atomically clean Pb (110). (c,d) Topographic STM images of two chain terminations with a difference of apparent height (≈10 pm) at their ends, (Vt=−10 mV, It=100 pA). (e) dI/dV point-spectra obtained at the chain end in c showing a ZBP. The proximity gap equal to Δ=1.1 meV was measured with a metallic tip.
