Surface states and local spin susceptibility in doped three-dimensional topological insulators with odd-parity superconducting pairing symmetry

Abstract

We investigate characteristic features in the spin response of doped three-dimensional topological insulators with odd-parity unequal-spin superconducting pairing, which are predicted to have gapless Majorana surface modes. These Majorana modes contribute to the local spin susceptibility, giving rise to a characteristic temperature behavior of the Knight shift and the spin-lattice relaxation time in magnetic resonance experiments. Because of their different decay lengths, the Majorana modes can be observed and clearly distinguished from the Dirac modes of the topological insulator by local probes which allow for a depth-controlled study of the electron spins on the nanometer length scale.

arXiv comment12 pages, 11 figures

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Cited by in corpus (14)

• Spin-Rotation Symmetry Breaking in the Superconducting State of CuxBi2Se3
• Dirac and Weyl Superconductors in Three Dimensions
• Topologically protected surface states in a centrosymmetric superconductor beta-PdBi2
• Superconductivity in doped Dirac semimetals
• Dirac-Fermion-Induced Parity Mixing in Superconducting Topological Insulators
• Superconducting doped topological materials
• Surface electronic state of superconducting topological crystalline insulator
• Quasi-classical theory of tunneling spectroscopy in superconducting topological insulator
• ${}^{77}$Se nuclear magnetic resonance of topological insulator Bi${}_2$Se${}_3$
• Tight-binding theory of NMR shifts in topological insulators Bi2Se3 and Bi2Te3
• Effect of Fermi surface evolution on superconducting gap in superconducting topological insulator
• Nematic superconductivity in Cu${}_x$Bi${}_2$Se${}_3$: The surface Andreev bound states
• Effective low energy theory for surface Andreev bound states of superconducting phases in generalized Bernevig-Hughes-Zhang models
• Possible two-component pairings in electron-doped Bi${}_2$Se${}_3$ based on a tight-binding model