Current-Phase Relations

The on-chip field coil on our scanning SQUID susceptometers allows us to directly measure the current-phase relation (CPR) of Josephson junctions embedded in mesoscopic superconducting rings.

Schematic of a CPR measurement where the Josephson junction consists of a semiconductor nanowire (dark gray) proximitized by superconducting aluminum (light gray). The phase across the junction is tuned by the field coil (blue), and the resulting supercurrent is measured by the pickup loop (red).

This page is currently under construction. See the following CPR publications for more details: