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Physical review B
The semimetal-superconductor quantum phase transition on the two-dimensional (2D) surface of a 3D topological insulator is conjectured to exhibit an emergent N=2 supersymmetry, based on a renormalization group (RG) analysis at one-loop order in the ϵ expansion. We provide additional support for this conjecture by performing a three-loop RG analysis and showing that the supersymmetric fixed point found at this order survives the extrapolation to 2D. We compute critical exponents to order ϵ^3,doi:10.1103/physrevb.94.205106 fatcat:5rpgvdmu2ja3daz7hj67zz5c5m