Comparative study on the magnetic excitation spectra of Y123 and La214 high-Tc systems - are the dynamical stripes important?

M. Sato, M. Ito, H. Harashina, Y. Yasui, S. Iikubo, A. Kobayashi, K. Kakurai

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Abstract

The magnetic spectra χ″ of YBa2Cu3O 6.5 are compared with calculated results by the expression χ(q, ω) = χ0(q, ω) / {1 + J(q)χ0(q, ω)} with J(q) = J(cos qxa + cos qya). For the proper band parameters and other parameters, we obtained satisfactory agreement between experimental and calculated results without considering dynamical "stripes". The quasi particle broadening has been found to suppress the antiferromagnetic ordering. Effects of the dynamical "stripes" on χ″(q, ω) are clearly visible in La2-xSr xCuO4, which is in clear contrast to the results of YBa2Cu3O6.5.

Original languageEnglish
Pages (from-to)683-684
Number of pages2
JournalPhysica B: Condensed Matter
Volume329-333
Issue numberII
DOIs
Publication statusPublished - May 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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