Fig. 1: Schematic illustration of a dc SQUID based on S-c-S type of Josephson junctions.
From: Supercurrent diode effect in Josephson interferometers with multiband superconductors
The notation c means constriction between a single-band (gray part) and a multi-band superconductor (brown part). I1 and I2 define the corresponding currents through the Josephson junction.
