Fig. 3
From: Zero-energy pinning from interactions in Majorana nanowires
a Screening potential ϕ(x) along a proximitized InSb nanowire of radius R = 50 nm and length L = 1 μm for increasing Zeeman field V Z . We take Δ = 0.5 meV and μ = 0. Red (gray) curves correspond to an incompresible (compressible) regime. b Increase of the potential at the center of the wire ϕ(L/2) with V Z , and the corresponding effective g-factor g eff = g[1−∂ϕ(L/2)/∂V Z ] (blue line). Intervals in red correspond to almost perfect screening of V Z (g eff ≈ 0). c, d Non-interacting and interacting spectra of the nanowire. Note that perfect Zeeman screening by interactions is correlated with zero-energy pinnings of Majorana bound states (extended zero modes in red). An equivalent simulation to d including also intrinsic interactions in the nanowire is shown in Supplementary Material Fig. 1
