Local and Nonlocal Transport Spectroscopy in Planar Josephson Junctions

Understand

We report simultaneously acquired local and nonlocal transport spectroscopy in a phase-biased planar Josephson junction based on an epitaxial InAs/Al hybrid two-dimensional heterostructure.

• Quantum point contacts at the junction ends allow measurement of the 2 x 2 matrix of local and nonlocal tunneling conductances as a function of magnetic field along the junction, phase difference across the junction, and carrier density.
• A closing and reopening of a gap was observed in both the local and nonlocal tunneling spectra as a function of magnetic field.
• For particular tunings of junction density, gap reopenings were accompanied by zero-bias conductance peaks (ZBCPs) in local conductances.