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

Research output: Contribution to journalArticle

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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.

Original languageEnglish
Pages (from-to)470041-470044
Number of pages4
JournalPhysical Review Letters
Volume92
Issue number4
Publication statusPublished - Jan 30 2004
Externally publishedYes

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nuclear quadrupole resonance
cobalt
superconductivity
spin-lattice relaxation
electrons
spectrometers
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Unconventional Superconductivity and Electron Correlations in the Cobalt Oxyhydrate NA0.35CoO2 · yH2O from Nuclear Quadrupole Resonance. / Fujimoto, Tatsuya; Zheng, Guo-Qing; Kitaoka, Y.; Meng, R. L.; Cmaidalka, J.; Chu, C. W.

In: Physical Review Letters, Vol. 92, No. 4, 30.01.2004, p. 470041-470044.

Research output: Contribution to journalArticle

Fujimoto, Tatsuya ; Zheng, Guo-Qing ; Kitaoka, Y. ; Meng, R. L. ; Cmaidalka, J. ; Chu, C. W. / Unconventional Superconductivity and Electron Correlations in the Cobalt Oxyhydrate NA0.35CoO2 · yH2O from Nuclear Quadrupole Resonance. In: Physical Review Letters. 2004 ; Vol. 92, No. 4. pp. 470041-470044.
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