Extended Data Fig. 9: dI/dV maps of the 1 QL Sb2Te3/6 UC FeTe bilayer measured with opposite bias polarities.
From: Moiré engineering of Cooper-pair density modulation states
a, Atomic resolution STM image (10 × 10 nm2) measured at Vs = 100 mV and Is = 2 nA. b, Atomic resolution STM image (10 × 10 nm2) measured at Vs = −100 mV and Is = 2 nA. c, g(r, 100 mV) obtained simultaneously with (a). d, g(r, −100 mV) obtained simultaneously with (b). The green dots in (a-d) mark the same defect, serving as a spatial reference. e, Line profile of the black curve in (c, d), demonstrating contrast inversion in the differential conductance. The excitation voltage Ve in (a-d) is 10 mV.
