Fig. 3.

Finite momentum shift and simulation of trident pattern for ideal junction. a The shifted Fermi surface and spin texture (red arrows) of the TI due to a finite Zeeman effect. To form a spin singlet, Cooper pairs acquire a non-zero center of momentum, as indicated by the purple arrow. b Simulations of the Fraunhofer pattern for different values of B_y. We find that the intensity of superconductivity is transferred outwards to higher values of B_z as B_y is increased. c Evolution of the Fraunhofer pattern for a symmetric Josephson junction due to finite momentum pairing. The differential resistance is calculated and normalized to 1. The slope of the side branch is indicated by the dashed green line