Nuclear spin-lattice relaxation rate in theD1+iD2superconducting state: Implications for CoO superconductor

2003/07/23 by Yunkyu Bang, M. J. Graf, Alexander V. Balatsky +1
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.68.212504

5 pages, 4 figures, minor changes

arxiv created 2003/07/23 · openalex publication_date 2003/12/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We calculated the nuclear spin-lattice relaxation rate 1/T₁ for the D₁+iD₂ 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/T₁ is observed at low temperatures. Our results show that the D₁+iD₂ pairing symmetry of the superconducting state of Na_0.35CoO₂\ensuremath⋅yH₂O is compatible with recent ⁵⁹Co1/T₁ experiments of several groups.

Citations

• Electronic Model forCoO2Layer Based Systems: Chiral Resonating Valence Bond Metal and Superconductivity
• Superconductivity inCoO2layers and the resonating valence bond mean-field theory of the triangular latticet−Jmodel