Fig. 1. Schematic of Kitaevchain model^[17].

Fig. 2. Schematic sketch of a nanowire-superconductor hybrid structure and the wave function of the Majorana quasiparticle.

Fig. 3. Energy dispersion of a superconductor-semiconductor hybrid nanowire at different ∆-E_z-α configurations with μ = 0. Blue and red lines correspond to the two spin branch (along SOI direction), respectively, solid lines are particle branches, while dashed line are hole branches.

Fig. 4. Superconductor-semiconductor hybrid devices and the detected zero-energy conductance peaks: (a)−(c) NbTiN-InSb nanowire device and zero-energy conductance peak^[26]; (d)−(f) Fully epitaxial Al-InAs nanowire and zero-energy conductance peak in hard gap^[29]; (g), (h) Quantized zero-energy conductance peak in fully epitaxial Al-InSb nanowire devices^[40].