Cu-NMR Study on Bilayer High-Tc Cuprate La1.89Ca1.11Cu2O6+δ (La2126)

Takayuki Goto, Takao Watanabe, Kyoichi Kinoshita, Azusa Matsuda, Masafumi Sera, Shinichi Sakatsume, Tetsuo Fukase

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2 Citations (Scopus)

Abstract

The temperature dependence of the 63/65Cu-NMR relaxation rate T1-1 and the spectrum of the lightly doped high-Tc cuprate La1.89Ca1.11Cu2O6+δ (La2126) with bilayer CuO planes have been studied. The field-swept spectrum was explained by assuming that there are two Cu sites with quadrupole frequencies of 63νΩ = 25.6 and 32 MHz. The Knight shift decreased monotonically with decreasing temperature in the normal state, which is consistent with the reported result that the system belongs to the lightly doped region where the hole content is less than the optimum value. The Curie-Weiss temperature dependence of (T1T)-1 = 2600/(T + 110) (K - s)-1 in the normal state down to Tc indicates that the pseudo-spin gap does not always exist in lightly doped bilayer systems.

Original languageEnglish
Pages (from-to)2768-2771
Number of pages4
Journaljournal of the physical society of japan
Volume65
Issue number9
DOIs
Publication statusPublished - 1996 Jan 1
Externally publishedYes

Keywords

  • LaCaCuO (La2126)
  • NMR
  • Pseudo-spin gap
  • T

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Goto, T., Watanabe, T., Kinoshita, K., Matsuda, A., Sera, M., Sakatsume, S., & Fukase, T. (1996). Cu-NMR Study on Bilayer High-Tc Cuprate La1.89Ca1.11Cu2O6+δ (La2126). journal of the physical society of japan, 65(9), 2768-2771. https://doi.org/10.1143/JPSJ.65.2768