Fig. 2: Majorana zero mode in a vortex core.
From: Topological surface superconductivity in FeSe0.45Te0.55
a Spatial dependence of the superconducting order parameter in the dxz-orbital near a vortex core for a magnetic field of B = 2T. Color bar represents the normalized superconducting order parameter. Linecut of the orbitally-resolved local density of states, Na(r, E), through the center of the vortex core along the x-axis for the b dxz-, and c dxy-orbital in the topological phase with Chern number C = −1 and (JS, α, Δμxz, Δμyz, Δμxy) = (7.5, 7, 4, 4, 1) meV (the Majorana zero mode is indicated by a yellow arrow). Here, α is the Rashba spin–orbit coupling, and JS is the magnetic exchange strength. Color bar represents the normalized local density of states. d Linecut of the orbitally-resolved local density of states, Na(r, E), through the center of the vortex core along the x-axis for the dxz-orbital in the trivial C = 0 phase with (JS, α, Δμxz, Δμyz, Δμxy) = (3, 7, 4, 4, 1) meV. For the C = −1 topological phase (same parameters as in b, c): e Radially integrated local density of states for the dxz-orbital. f Energy position of the of the low energy states, as revealed by the peaks in the local density of states in (e).
