De-localized states in three-terminal InSb nanowire devices

Majorana bound states(MBS) has been predicted to emerge in 1D nanowire with induced superconductivity, spin-orbital coupling and external magnetic field. Although zero bias peak(ZBP) has been observed in different systems for years, no tunneling spectroscopy has verified the existence of the two Majorana bound states that should appear at the boundaries of the topological regime. We fabricated three-terminal devices with 400nm long superconducting contact in the middle and de-localized states have been observed from two sides measured simultaneously. On the contrary of the regime where the ZBP usually be observed in two terminal devices, those de-localized states appear in more open regime with more subbands available. Ongoing measurements will be dedicated to answer whether ZBP could appear in that regime and be observed from two sides.