Spin-gap and the superconducting fluctuations in high-Tc cuprates probed by 63Cu NMR

Guo-Qing Zheng, H. Ozaki, Y. Kitaoka, W. G. Clark, Y. Kodama, T. Kondo, Y. Shimakawa, Y. Kubo, P. Kuhns, A. P. Reyes, W. G. Moulton

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Abstract

From the 63Cu Knight shift and the nuclear spin-lattice relaxation rate under magnetic fields from zero up to 28 T in the underdoped (U) YBa2Cu4O8 and the slightly overdoped (O) TlSr2CaCu2O6.8, we find that the spin-gap (pseudogap) behaviors show contrasting response to magnetic fields in the U and O compounds. In the O compound, the spin-gap is strongly field dependent and can be accounted for by the superconducting fluctuation effects, but that in the U compound shows no field dependence. The implication is discussed.

Original languageEnglish
Pages (from-to)25-27
Number of pages3
JournalJournal of Physics and Chemistry of Solids
Volume62
Issue number1-2
DOIs
Publication statusPublished - Jan 2001
Externally publishedYes

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Zheng, G-Q., Ozaki, H., Kitaoka, Y., Clark, W. G., Kodama, Y., Kondo, T., Shimakawa, Y., Kubo, Y., Kuhns, P., Reyes, A. P., & Moulton, W. G. (2001). Spin-gap and the superconducting fluctuations in high-Tc cuprates probed by 63Cu NMR. Journal of Physics and Chemistry of Solids, 62(1-2), 25-27. https://doi.org/10.1016/S0022-3697(00)00095-0