Metal-insulator transition in C60 fullerides

Y. Iwasa, T. Takenobu, H. Kitano, A. Maeda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Intercalated fullerides A3C60 (A = K and Rb) are well known BCS-type superconductors, but their superconductivity is easily destroyed by subtle chemical modification, resulting in the antiferromagnetically ordered states. This property is suggestive of the importance of electron correlation effect. Using microwave cavity perturbation technique, we found that the conductivity at 250 K of the antiferromagnet compounds is already 3-4 orders of magnitude smaller than those of superconducting compounds. These results strongly suggest that the Mott-Hubbard transition in the A3C60 systems is driven by reduction of lattice symmetry.

Original languageEnglish
Pages (from-to)615-616
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Volume388-389
DOIs
Publication statusPublished - 2003 May
Externally publishedYes

Keywords

  • Antiferromagnetic insulator
  • Fullerides
  • Mott-Jahn Teller system

ASJC Scopus subject areas

  • Condensed Matter Physics

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