Fig. 1

Tilted vortex cores. a The vortex lattice as a function of the polar angle (θ) at 0.6 T with azimuthal angle φ = 0°. Maps trace the zero-bias normalized conductance (normalized conductance units, NCU). Scale bar = 50 nm. In the lower right panel we show the vortex density (blue points) compared with expectations taking into account the anisotropy of the upper critical field (dashed line, see Supplementary Note 1)¹⁶. b Maps with polar angle close to θ = 90° for two different azimuthal angles φ = 0° (left panel) and φ = 30° (right panel). There is a small uncertainty in θ, which produces outgoing vortices and a pattern of stripes. Color scale of both figures is the same as in a. c The normalized tunneling conductance curves when crossing a stripe are shown in the main panel. Bottom curves are tunneling conductance data outside the stripe and top curves at the center of the stripe. In the lower right inset we show a zero bias conductance image with an outgoing vortex and the stripes. The red arrow provides the path giving the set of tunneling conductance curves of the main panel. Upper inset shows a zoom of the evolution of the conductance close to zero bias, with a dashed red line marking the splitting of the zero-bias peak. All data are taken at T = 150 mK