Rashba spin-orbit coupling effects in quasiparticle interference of non-centrosymmetric superconductors

Abstract

The theory of quasiparticle interference (QPI) for non-centrosymmetric (NCS) superconductors with Rashba spin-orbit coupling is developed using T-matrix theory in Born approximation. We show that qualitatively new effects in the QPI pattern originate from the Rashba spin-orbit coupling: The resulting spin coherence factors lead to a distinct difference of charge- and spin- QPI and to an induced spin anisotropy in the latter even for isotropic magnetic impurity scattering. In particular a cross - QPI appears describing the spin oscillation pattern due to nonmagnetic impurity scattering which is directly related to the Rashba vector. We apply our theory to a 2D model for the NCS heavy fermion unconventional superconductor CePt${}_3$Si and discuss the new QPI features for a gap model with accidental node lines due to its composite singlet-triplet nature.

6 pages, 5 figures

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Cited by in corpus (13)

• Theory of quasiparticle scattering interference on the surface of topological superconductors
• Multiorbital and hybridization effects in the quasiparticle interference of triplet superconductor Sr2RuO4
• Full t-matrix approach to quasiparticle interference in non-centrosymmetric superconductors
• Gapped Dirac cones and spin texture in thin film topological insulator
• Drumhead surface states and their signatures in quasiparticle scattering interference
• Proximity-driven ferromagnetism and superconductivity in the triangular Rashba-Hubbard model
• Gap function of hexagonal pnictide superconductor SrPtAs from quasiparticle interference spectrum
• Fermi surface segmentation in the helical state of a Rashba superconductor
• Momentum space imaging of the FFLO state
• Hidden order symmetry and superconductivity in URu2Si2 investigated by quasiparticle interference
• Investigation of magnetic phases in parent compounds of Iron-chalcogenides via quasiparticle scattering interference
• Momentum space imaging of locally noncentrosymmetric superconductors
• Detecting the topological winding of superconducting nodes via Local Density of States