Temperature-dependence of low-energy spin excitation in electron-doped high-Tc superconductor Pr1 - x LaCex CuO4

M. Nakagawa, M. Fujita, K. Yamada

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We studied the temperature-dependences of low-energy spin fluctuations in electron-doped high-Tc cuprates, Pr1 - x LaCex CuO4 (PLCCO) for both superconducting (SC) and long range antiferromagnetic (AF) ordered phases. We clarified the different thermal evolution of local spin susceptibility χ (ω) between the AF and SC samples. For the former sample (x = 0.07), χ (ω) is nearly temperature-independent in the AF ordered state. On the other hand, for the latter samples (x = 0.11 and 0.15), the spectral weight in lower-energy region decreases and the peak-energy in χ (ω) shifts toward high-energy region upon heating. Such different thermal evolution of spin fluctuations between the AF and SC phases is discussed from a viewpoint of degradation of spin correlations by electron-doping which reduces in-plane averaged magnetic interaction.

Original languageEnglish
Pages (from-to)3156-3159
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Issue number12
Publication statusPublished - 2008 Dec

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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