Two-spin superexchange and four-spin cyclic exchange interactions in high Tc superconducting cuprates and isostructural La2NiO4

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

Research output: Contribution to journalArticlepeer-review


Raman spectra in the antiferromagnetic insulator phases of s = 1/2 high Tc superconducting cuprates were compared with s = 1 La2NiO4. The anomalous magnon spectra in cuprates suggest that the four-spin cyclic exchange interactions are very large. The doped carriers in cuprates show non-Fermi liquid behavior.

Original languageEnglish
Pages (from-to)631-632
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Publication statusPublished - 1990
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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