Figure 3: Suppression of SQUID nodal current at elevated temperature.
From: Evidence for an anomalous current–phase relation in topological insulator Josephson junctions
(a) Current–voltage curves at the SQUID node closest to zero applied field (B=0.04 mT) and VTG=−18 V. (b) Temperature dependence of SQUID nodal (B=0.04 mT, black squares) and SQUID antinodal (B=0.146 mT, red squares) critical currents; both sets are normalized by their values at 20 mK and were taken at VTG=−18 V. In both cases, current–voltage curves were taken as close to zero applied field as possible, where there is a minimal amount of magnetic flux threading the individual junctions. For rounded current–voltage curves, we use the ‘excess current’ method to determine critical current.
