Orateur
Description
We present an exact formalism (Phys. Rev. B 100, 081106 (2019)) to describe the formation of end, edge or surface states through the evolution of impurity-induced states. We propose a general algorithm that consists of finding the impurity states via the T-matrix formalism and showing that they evolve into boundary modes when the impurity potential goes to infinity. Thus, in order to compute the surface states and the surface Green's functions we start with an infinite 3D system and model the boundary using a plane-like infinite-amplitude potential (Phys. Rev. B 102, 165117 (2020)). We apply our method to UTe2 in the superconducting state to calculate the surface states and the corresponding QPI patterns, and we compare our results to experimental findings. Our predictions are most consistent with these findings if the bulk superconducting gap function of UTe2 is described by a B3u pairing (S. Wang et al, Nature Physics 2025, arXiv:2503.17761)
