Nuclear spin-lattice relaxation rate in the D1+iD2 superconducting state: Implications for CoO superconductor

Yunkyu Bang; M. J. Graf; A. V. Balatsky

doi:10.1103/PhysRevB.68.212504

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Nuclear spin-lattice relaxation rate in the D1+iD2 superconducting state: Implications for CoO superconductor

Yunkyu Bang, M. J. Graf, A. V. Balatsky

DOI 10.1103/PhysRevB.68.212504 · Physical Review B

T1

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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 Na0.35CoO2⋅yH2O is compatible with recent 59Co1/T1 experiments of several groups.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Na0.35CoO2·yH2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	3.9	Pressure not reported	unknown
Na0.35CoO2·yH2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4.5	Pressure not reported	unknown
Na0.35CoO2·yH2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5	Pressure not reported	unknown