Figure 5: Relationship between the differential conductance and symmetry components.

(a,c,e) The dI/dV-V characteristics measured at
=0° (black),
=45° (pink) and
=135° (light blue) on devices A–C, respectively. (b,d,f) The fourfold symmetry components C4 along
(green), twofold symmetry components
along [110] (pink) and twofold symmetry components
along [010] (grey) as a function of V. These components are obtained by fitting the curves expressed by equation (2) to the normalized dI/dV-
curves at each V. The vertical dotted lines represent the V at which C4 reaches dips.