Probing the current phase relation of Josephson junctions in an InSbAs 2-dimensional electron gas

A superconducting quantum interference device (SQUID) is often used to probe the current-phase relationship (CPR) of a Josephson junction by controlling the phase difference across the junction of interest. In a material with strong spin-orbit coupling, tuning this phase difference to π is expected to result in topological superconductivity. We study SQUIDs in a hybrid Al/InSbAs 2-dimensional electron gas, a material with large spin-orbit coupling and g-factor. We simultaneously measure the CPR and perform tunneling spectroscopy at the edge of the junction to probe the Andreev bound states. We also study the evolution of the CPR and Andreev spectrum by changing the carrier density and in-plane magnetic field.