Nuclear spin-lattice relaxation rate in the D+iD superconducting state: implications for CoO superconductor

Abstract

We calculated the nuclear spin-lattice relaxation rate $1/T_1$ for the D+iD superconducting state with impurities. We found that small amount of unitary impurities quickly produces the residual density of states inside the gap. As a result, the T-linear behavior in 1/T${}_1$ is observed at low temperatures. Our results show that the D+iD pairing symmetry of the superconducting state of Na${}_{0.35}$CoO${}_2\cdot y$H${}_2$ O is compatible with recent ${}^{59}$Co 1/T${}_1$ experiments of several groups.

arXiv comment5 pages, 4 figures, minor changes

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• Gap Renormalization in Dirty Anisotropic Superconductors: Implications for the Order Parameter of the Cuprates
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Cited by in corpus (5)

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• Superconducting Pairing Symmetries in Anisotropic Triangular Quantum Antiferromagnets
• Superconductivity in epitaxial thin films of NaxCoO2 y D2O
• The nuclear spin-lattice relaxation rate in the PuMGa${}_5$ materials
• Pressure dependence of the superconducting transition and electron correlations in Na_xCoO_2 \cdot 1.3H_2O