Fig. 6 | Nature Communications

Fig. 6

From: Induced unconventional superconductivity on the surface states of Bi2Te3 topological insulator

Fig. 6

Sketch of the device showing the induced order parameter and the occurrence of π-paths across the junction. a Three-dimensional sketch of the Bi2Te3 device. The Al electrodes (S) induce an effective p + s-wave superconductivity on the surface of the TI. In the picture we consider only the chiral term of the total OP. In close proximity of a low transparency interface the chiral p x  + ip y changes symmetry resulting in a predominant p y component (see main text for details). b Top view of the device. The occurrence of scattering at the pyramid corners and/or at the merging points of two pyramidal domains, in the N region of the junction, makes quasiparticle trajectories emerging from a negative p y lobe (blue arrow) on one side of the junction to couple with trajectories that probe the negative p y lobe (red arrow) on the other side of the junction. In case of scattering-free transport in the N region the quasi-particles trajectories probe the same phase in both electrodes (red arrows)

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