NMR study of magnetic excitations and pseudogap in HgBa2Ca3Cu4Oy

Y. Tokunaga, K. Ishida, K. Magishi, S. Ohsugi, G. Q. Zheng, Y. Kitaoka, K. Asayama, A. Iyo, K. Tokiwa, H. Ihara

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10 Citations (Scopus)

Abstract

We report systematic Cu-NMR study on HgBa2Ca3Cu4O10+y with Tc = 123K comprising respective 4-fold and 5-fold two CuO2 planes surrounded by square and pyramidal oxygens. Possible structure and temperature dependence of the normal-state pseudogap have been extracted from the steep decrease of the spin contribution in the Knight shift, Ks below TK* ∼ 220 K. By assuming the linear increase of a size of pseudogap between TK* and Tc with the dx2-y2 symmetry, the T-dependence of Ks/Kn in both 4- and 5-fold is reproduced below TK*.

Original languageEnglish
Pages (from-to)571-572
Number of pages2
JournalPhysica B: Condensed Matter
Volume259-261
DOIs
Publication statusPublished - Jan 1 1999
Externally publishedYes

Keywords

  • High-T superconductor
  • NMR
  • Pseudogap

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Tokunaga, Y., Ishida, K., Magishi, K., Ohsugi, S., Zheng, G. Q., Kitaoka, Y., Asayama, K., Iyo, A., Tokiwa, K., & Ihara, H. (1999). NMR study of magnetic excitations and pseudogap in HgBa2Ca3Cu4Oy. Physica B: Condensed Matter, 259-261, 571-572. https://doi.org/10.1016/S0921-4526(98)01066-7