Fig. 4

Calculated tilted vortex core shape vs. energy. We show calculated DOS patterns as a function of the energy (a at 0 meV, b at 0.2 meV, c at 0.4 meV, d at 0.6 meV, e at 0.8 meV). In the left panels we show the DOS of a vortex with the field tilted along the a axis (φ = 0°, x-axis of the panels), calculated without taking into account surface currents. In the middle and right panels we show the result taking into account surface currents when the in-plane tilt is φ = 0° (middle panels) and φ = 30° (right panels). The current is of qa = 0.008 in both cases. The direction of in-plane magnetic field and current is shown by the red arrows in a. The scale bar is shown in the left panel of (a) and is the same for all panels, of 30 nm size. The color map goes from yellow (minimum DOS) to the zero bias peak in the DOS in black. The white dots in each panel show the phase singularity point. The tilt strength is τ = 0.5 in all panels. Insets in middle and right panels of (a) display the core shape on a logarithmic gray scale together with the shape of the order parameter as an iso-contour of the DOS (red dashed lines) and an iso-contour of the DOS (red line).