Phenomenology of the chiral $d$-wave state in the hexagonal pnictide superconductor SrPtAs

Abstract

The pairing symmetry of the hexagonal pnictide superconductor SrPtAs is discussed with taking into account its multiband structure. The topological chiral $d$-wave state with time-reversal-symmetry breaking has been anticipated from the spontaneous magnetization observed by the muon-spin-relaxation experiment. We point out in this paper that the recent experimental reports on the nuclear-spin-lattice relaxation rate $T_1^{-1}$ and superfluid density $n_s(T)$, which seemingly support the conventional $s$-wave pairing, are also consistent with the chiral $d$-wave state. The compatibility of the gap and multiband structures is crucial in this argument. We propose that the measurement of the bulk quasiparticle density of states would be useful for the distinction between two pairing states.

arXiv comment6 pages, 6 figures. arXiv admin note: substantial text overlap with arXiv:1902.10519

References in corpus (12)

• Evidence for Time-Reversal-Symmetry-Broken Superconductivity in Locally Noncentrosymmetric SrPtAs
• On edge states in superconductor with time inversion symmetry breaking
• Chiral $d$-wave Superconductivity in SrPtAs
• Superconductivity in the Honeycomb-Lattice Pnictide SrPtAs
• Possible pairing symmetries in SrPtAs with a local lack of inversion center
• Nuclear magnetic relaxation and superfluid density in Fe-pnictide superconductors: An anisotropic \pm s-wave scenario
• Spin-singlet superconductivity with a full gap in locally non-centrosymmetric SrPtAs
• Symmetry and Gap Classification of the non-symmorphic SrPtAs
• Surface magnetism in a chiral d-wave superconductor with hexagonal symmetry
• High-resolution magnetic penetration depth and inhomogeneities in locally noncentrosymmetric SrPtAs
• Gap function of hexagonal pnictide superconductor SrPtAs from quasiparticle interference spectrum
• Role of spin-orbit coupling on the electronic structure and properties of SrPtAs

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• Designing edge currents using mesoscopic patterning in chiral d-wave superconductors