Metallic conductivity and metal-insulator transition in (AC60)n (A=K, Rb, and Cs) linear polymer fullerides

F. Bommeli, L. Degiorgi, P. Wachter, A. Legeza, A. Jánossy, G. Oszlanyi, O. Chauvet, L. Forro

Research output: Contribution to journalArticle

137 Citations (Scopus)

Abstract

Magnetic spin susceptibility and optical conductivity from 1 to 100 meV and at 9 GHz are presented for the recently discovered alkali-metal fulleride linear polymers, (AC60)n (A=K, Rb, and Cs). We find that (KC60)n is a metal with an enhanced Pauli susceptibility and a low-frequency conductivity decreasing with increasing temperature. (RbC60)n and (CsC60)n are also conducting at high temperatures but have a metal-insulator transition at 50 and 40 K, respectively. The data are suggestive of a quasi-one-dimensional instability towards a condensed spin-density-wave state.

Original languageEnglish
Pages (from-to)14794-14797
Number of pages4
JournalPhysical Review B
Volume51
Issue number20
DOIs
Publication statusPublished - Jan 1 1995

ASJC Scopus subject areas

  • Condensed Matter Physics

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