Unconventional Superconductivity and Electron Correlations in the Cobalt Oxyhydrate NA0.35CoO2 · yH2O from Nuclear Quadrupole Resonance

Tatsuya Fujimoto; Guo Qing Zheng; Y. Kitaoka; R. L. Meng; J. Cmaidalka; C. W. Chu

Unconventional Superconductivity and Electron Correlations in the Cobalt Oxyhydrate NA_0.35CoO₂ · yH₂O from Nuclear Quadrupole Resonance

Tatsuya Fujimoto, Guo Qing Zheng, Y. Kitaoka, R. L. Meng, J. Cmaidalka, C. W. Chu

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Abstract

A ⁵⁹ nuclear quadrupole resonance (NQR) measurement on cobalt oxyhydrate Na_0.35CoO₂·yH₂O superconductor was performed. NQR measurements were carried out using a phase-coherent spectrometer. The spin-lattice relaxation rate follwed a Curie-Weiss type temperature variation in the normal state that indicated two-dimensional antiferromagnetic spin correlations. As the temperature decreased, the spin-relaxation rate also decreased with no coherence peak and indicated non-s-wave superconductivity that was consistent with the existence of line nodes in the gap function.

Original language	English
Article number	047004
Pages (from-to)	470041-470044
Number of pages	4
Journal	Physical review letters
Volume	92
Issue number	4
Publication status	Published - 2004 Jan 30

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

Cite this

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abstract = "A 59 nuclear quadrupole resonance (NQR) measurement on cobalt oxyhydrate Na0.35CoO2·yH2O superconductor was performed. NQR measurements were carried out using a phase-coherent spectrometer. The spin-lattice relaxation rate follwed a Curie-Weiss type temperature variation in the normal state that indicated two-dimensional antiferromagnetic spin correlations. As the temperature decreased, the spin-relaxation rate also decreased with no coherence peak and indicated non-s-wave superconductivity that was consistent with the existence of line nodes in the gap function.",

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AU - Fujimoto, Tatsuya

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AU - Kitaoka, Y.

AU - Meng, R. L.

AU - Cmaidalka, J.

AU - Chu, C. W.

PY - 2004/1/30

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N2 - A 59 nuclear quadrupole resonance (NQR) measurement on cobalt oxyhydrate Na0.35CoO2·yH2O superconductor was performed. NQR measurements were carried out using a phase-coherent spectrometer. The spin-lattice relaxation rate follwed a Curie-Weiss type temperature variation in the normal state that indicated two-dimensional antiferromagnetic spin correlations. As the temperature decreased, the spin-relaxation rate also decreased with no coherence peak and indicated non-s-wave superconductivity that was consistent with the existence of line nodes in the gap function.

AB - A 59 nuclear quadrupole resonance (NQR) measurement on cobalt oxyhydrate Na0.35CoO2·yH2O superconductor was performed. NQR measurements were carried out using a phase-coherent spectrometer. The spin-lattice relaxation rate follwed a Curie-Weiss type temperature variation in the normal state that indicated two-dimensional antiferromagnetic spin correlations. As the temperature decreased, the spin-relaxation rate also decreased with no coherence peak and indicated non-s-wave superconductivity that was consistent with the existence of line nodes in the gap function.

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Unconventional Superconductivity and Electron Correlations in the Cobalt Oxyhydrate NA_0.35CoO₂ · yH₂O from Nuclear Quadrupole Resonance

Abstract

All Science Journal Classification (ASJC) codes

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