Comparing Majorana ZBP with trivial Andreev bound states and super hard superconducting gap in InSb nanowire hybrid devices

Majorana bound states(MBS) has been predicted to emerge in 1D nanowire with induced superconductivity, spin-orbital coupling and external magnetic field. Tunneling spectroscopy can be used to probe the signal of MBS, namely Zero bias conductance peaks(ZBP) appearing at finite field with suitable chemical potential. However, trivial Andreev bound states due to quantum confinement can also give rise to ZBPs with very similar manner. We compare Majorana ZBPs with Andreev bound states in different aspects: ZBP phase diagram, onset magnetic field and field angle dependence. We will also show super hard induced superconducting gap in our system with further improved contact recipe.