Structural and electronic properties of the noncubic superconducting fullerides A′64C60(A′ = Ba, Sr)

Craig M. Brown, Susumu Taga, Balvinder Gogia, Konstantinos Kordatos, Serena Margadonna, Kosmas Prassides, Yoshihiro Iwasa, Katsumi Tanigaki, Andrew N. Fitch, Philip Pattison

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

The absence of superconductivity in noncubic alkali fullerides, A4C60(A = K, Rb, Cs) has been associated with the effects of electron correlation and electron-phonon interaction on the narrow t1u - -derived conduction band. We find that the structurally related alkaline earth fullerides, A′4C60 (A′ = Sr, Ba), are superconducting with small values of the densities of states at the Fermi level, Nε F. Close contacts between Ba2+ ions and neighboring C60 units in Ba4C60 imply a strong orbital hybridization, which is evidently responsible for stabilizing the noncubic superconducting phase, in contrast to insulating A4C60.

Original languageEnglish
Pages (from-to)2258-2261
Number of pages4
JournalPhysical Review Letters
Volume83
Issue number11
DOIs
Publication statusPublished - 1999 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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