Observation of Conductance Quantization in InSb Nanowire Networks

Majorana
zero modes (MZMs) are prime candidates for robust topological
quantum bits, holding a great promise for quantum computing. Semiconducting
nanowires with strong spin orbit coupling offer a promising platform
to harness one-dimensional electron transport for Majorana physics.
Demonstrating the topological nature of MZMs relies on braiding, accomplished
by moving MZMs around each other in a certain sequence. Most of the
proposed Majorana braiding circuits require nanowire networks with
minimal disorder. Here, the electronic transport across a junction
between two merged InSb nanowires is studied to investigate how disordered
these nanowire networks are. Conductance quantization plateaus are
observed in most of the contact pairs of the epitaxial InSb nanowire
networks: the hallmark of ballistic transport behavior.