Effect of Fermi surface evolution on superconducting gap in superconducting topological insulator

Abstract

We study bulk electronic states of superconducting topological insulator, which is the promising candidate for topological superconductor. Recent experiments suggest that the three-dimensional Fermi surface evolves into two-dimensional one. We show that the superconducting energy gap structure on the Fermi surface systematically changes with this evolution. It is clarified that the bulk electronic properties such as spin-lattice relaxation rate and specific heat depend on the shape of the Fermi surface and the type of the energy gap function. These results serve as a guide to determine the pairing symmetry of Cu${}_x$Bi${}_2$Se${}_3$.

12 pages, 6 figures

References in corpus (9)

• Non-Abelian Anyons and Topological Quantum Computation
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Bulk superconducting phase with a full energy gap in the doped topological insulator Cu_xBi_2Se_3
• Local Measurements of the Superconducting Pairing Symmetry in CuxBi2Se3
• NMR relaxation rate and dynamical structure factors in nematic and multipolar liquids of frustrated spin chains under magnetic fields
• Spatially Anisotropic Heisenberg Kagome Antiferromagnet
• Anomalous suppression of the superfluid density in the CuxBi2Se3 superconductor upon progressive Cu intercalation
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• Dynamical Monte Carlo investigation of spin reversals and nonequilibrium magnetization of single-molecule magnets

Cited by in corpus (2)

• Nematic superconductivity in doped Bi2Se3 topological superconductors
• Superconducting doped topological materials