Visualizing the $d$-vector in a nematic triplet superconductor

Abstract

Recent experiments show strong evidences of nematic triplet superconductivity in doped Bi${}_2$Se${}_3$ and in Bi${}_2$Te${}_3$ thin film on a superconducting substrate, but with varying identifications of the direction of the $d$-vector of the triplet that is essential to the topology of the underlying superconductivity. Here we show that the $d$-vector can be directly visualized by scanning tunneling measurements: At subgap energies the $d$-vector is along the leading peak wave-vector in the quasi-particle-interference pattern for potential impurities, and counter-intuitively along the elongation of the local density-of-state profile of the vortex. The results provide a useful guide to experiments, the result of which would in turn pose a stringent constraint on the pairing symmetry.

5 pages, 5 color figures

References in corpus (25)

• Non-Abelian Anyons and Topological Quantum Computation
• Paired states of fermions in two dimensions with breaking of parity and time-reversal symmetries, and the fractional quantum Hall effect
• Non-abelian statistics of half-quantum vortices in p-wave superconductors
• Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator
• Odd-Parity Topological Superconductors: Theory and Application to Cu${}_x$Bi${}_2$Se${}_3$
• Topological Superconductivity in CuxBi2Se3
• Reply to Comment on "Unconventional s-wave superconductivity in Fe(Se,Te)"
• Discovery of Orbital-Selective Cooper Pairing in FeSe
• Spin-Rotation Symmetry Breaking in the Superconducting State of CuxBi2Se3
• Bulk superconducting phase with a full energy gap in the doped topological insulator Cu_xBi_2Se_3
• Quasiparticle Scattering Interference in High Temperature Superconductors
• Observation of half-height magnetization steps in Sr2RuO4
• Topological Superconductor Bi2Te3/NbSe2 heterostructures
• Thermodynamic evidence for nematic superconductivity in Cu${}_x$Bi${}_2$Se${}_3$
• Odd-parity topological superconductor with nematic order: Application to CuxBi2Se3
• Local Measurements of the Superconducting Pairing Symmetry in CuxBi2Se3
• Proximity-induced high-temperature superconductivity in topological insulators Bi2Se3 and Bi2Te3
• Anisotropic Energy Gaps of Iron-based Superconductivity from Intra-band Quasiparticle Interference in LiFeAs
• Majorana Fermions and Exotic Surface Andreev Bound States in Topological Superconductors: Application to CuxBi2Se3
• Rotational Symmetry Breaking in a Trigonal superconductor Nb-doped Bi2Se3
• Spectroscopic Fingerprint of Phase-Incoherent Superconductivity in the Cuprate Pseudogap State
• Non-Abelian Majorana Doublets in Time-Reversal Invariant Topological Superconductor
• Identification of nematic superconductivity from the upper critical field
• Field-angle-dependent low-energy excitations around a vortex in the superconducting topological insulator CuxBi2Se3
• Superconducting and normal-state anisotropy of the doped topological insulator Sr${}_{0.1}$Bi${}_2$Se${}_3$

Cited by in corpus (7)

• Emergent vortex Majorana zero mode in iron-based superconductors
• Lifshitz transition in dirty nematic superconductor
• Quasiparticle interference in doped topological insulators with nematic superconductivity
• Visualizing Pairing Symmetry in Nematic Superconductors using spin-polarized spectroscopy of magnetic impurities
• Quasiparticle Bound States around Fractional Vortices in s-wave Superconductor
• Quantized bound states around a vortex in anisotropic superconductors
• Phenomenological theory in reentrant uranium-based superconductors