Spins and carriers in oxide superconductors studied by raman scattering

S. Sugai, M. Sato, T. Ito, T. Ido, H. Takagi, S. Uchida, T. Kobayashi, J. Akimitsu, Y. Hidaka, T. Murakami, S. Hosoya, T. Kajitani, T. Fukuda

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5 Citations (Scopus)

Abstract

The spin and doped charge states in copper oxide superconductors were investigated by Raman spectroscopy. The anomalous magnon scattering in the antiferromagnetic insulator phases, such as the second peaks near 4J (J is the two-spin superexchange energy) in the B1g spectra and the large scattering intensities in the A1g spectra, suggests the existence of four-spin cyclic exchange interactions. When carriers are doped, the A1g spectra show non-“normal Fermi liquid” behavior. The imaginary part of the experimentally obtained susceptibility have ω-proportional part from ω~0. The gradient increases, on cooling, as in the case of the marginal Fermi liquid.

Original languageEnglish
Pages (from-to)1263-1264
Number of pages2
JournalPhysica B: Condensed Matter
Volume165-166
DOIs
Publication statusPublished - Jan 1 1990
Externally publishedYes

ASJC Scopus subject areas

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

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    Sugai, S., Sato, M., Ito, T., Ido, T., Takagi, H., Uchida, S., Kobayashi, T., Akimitsu, J., Hidaka, Y., Murakami, T., Hosoya, S., Kajitani, T., & Fukuda, T. (1990). Spins and carriers in oxide superconductors studied by raman scattering. Physica B: Condensed Matter, 165-166, 1263-1264. https://doi.org/10.1016/S0921-4526(09)80217-2