Figure 1: Measurement configuration and supercurrent characterization
From: Symmetry protected Josephson supercurrents in three-dimensional topological insulators
(a) Device and measurement schematic and (b) scanning electron microscopy image of device 1. The blue dots in a represent 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) molecules. The Hall measurement was performed in the Hall bar by applying current I and measuring longitudinal (Vxx) and Hall (VH) voltages, while the Josephson effect was measured in the closely spaced junction by applying current IJ and measuring voltage VJ. The scale bar in b corresponds to 1 μm. (c) I–V curves measured in device 2 at Vg=0 for four different temperatures, showing typical supercurrent behaviour.
