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Stationary phase approximation approach to the quasiparticle interference on the surface of a strong topological insulator
Topological insulators have surface states with unique spin-orbit coupling. With impurities on the surface, the quasiparticle interference pattern is an effective way to reveal the topological nature of the surface states, which can be probed by scanning tunneling microscopy. In this paper, we present a general analytic formulation of the …