Figure 4: Tight-binding transport calculation reproducing the experimental results and local current density profiles revealing the snake states.

(a) Tight-binding calculation of conductance (bottom) and its numerical derivative dG/dB (top, in arbitrary unit). The parabola-like lines seen in the experiment are well captured. (b) along the white dashed line in a at B=90 mT. (c) Calculated x component of the local current density distribution, j_x, for electrons injected from the left contact with a small d.c.-offset at B=90 mT and  V (dashed circle in b). The complex resonance pattern in the left cavity consists of ‘bubbling’ trajectories that do not contribute to conductance. At the p–n interface (dashed line), an alternating current pointing to the left (red) and right (blue) is observed. (d–g) Current density profiles at different corresponding to the circles in b. As a guide to the eye, a snaking trajectory following j_x is added. From one conductance maximum to the next (that is, c to g), one snake period is added. The snake state in e and f corresponds to a conductance minimum and c,d and g to a maximum.