Surface Spectral Function of Momentum-dependent Pairing Potentials in a Topological Insulator: Application to Cu${}_x$Bi${}_2$Se${}_3$

Abstract

We propose three possible momentum-dependent pairing potentials for candidate of topological superconductor (for example Cu${}_x$Bi${}_2$Se${}_3$), and calculate the surface spectral function and surface density of state with these pairing potentials. We find that the first two can give the same spectral functions as the fully-gapped and node-contacted pairing potentials given in [Phys. Rev. Lett. 105, 097001], and that the third one can obtain topological non-trivial case which exists flat Andreev bound state and preserves the $C_3$ rotation symmetry. We hope our proposals and results be judged by future experiment.

5 pages, 3 figures

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Cited by in corpus (4)

• Symmetry Protected Topological Superfluids and Superconductors --- From the Basics to ${}^3$He ---
• Dirac-Fermion-Induced Parity Mixing in Superconducting Topological Insulators
• Superconducting doped topological materials
• Quasi-classical theory of tunneling spectroscopy in superconducting topological insulator