Neutron-scattering study on spin fluctuations in high-temperature-tetragonal phase of La1.70 Sr0.24 Ce0.06 CuO4

M. Enoki, M. Fujita, K. Yamada

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6 Citations (Scopus)

Abstract

We investigated spin fluctuations in the high-temperature-tetragonal phase of La1.70 Sr0.24 Ce0.06 CuO4. At 8 K, well-defined incommensurate spin fluctuations were observed for ω ≥ 4 meV, while no clear signal was observed at 2 meV, indicating an opening of spin gap. At ω = 7 meV, the peak-sharpening in momentum was observed in the superconducting state and the peak-intensity increases below Tc upon cooling. These results are quantitatively similar to those observed for the low-temperature-orthorhombic phase of optimarlly and slightly overdoped La2 - x Srx CuO4 (LSCO), suggesting the reduction of hole concentration by Ce doping and no distinct effect from the lattice distortion on the spin fluctuations in the optimally doped LSCO.

Original languageEnglish
Pages (from-to)2111-2114
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume68
Issue number11
DOIs
Publication statusPublished - 2007 Nov

Keywords

  • C. Neutron scattering

ASJC Scopus subject areas

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

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