Band filling and width control in fullerides

Y. Iwasa*, S. Taga, T. Takenobu, H. Shimoda, T. Mitani, K. Prassides, C. M. Brown

*この研究の対応する著者

研究成果: Article査読

抄録

Highly doped states of fullerene C60 solids have been investigated. A single phase of binary Ba4C60 was first synthesized and confirmed to be a noncubic ambient pressure superconductor. By cointercalation of alkali metals and Ba, an isostructural series of alkali-Ba-C60 ternaries have been synthesized. This new class of compounds allows us to vary the band-filling and band-filling with keeping the body-centered-cubic (bcc) structure unchanged. Systematic synthesis study of these Ba-including fullerides uncovered various aspects of the highly doped fullerides. Of particular interest is that the criteria for the occurrence of superconductivity are considerably different between the low and high reduction states. Superconductivity at the low reduction state is strictly limited at the half-filling of the t1u band and the fcc-related structures, while that at the high reduction state appears at several valence states irrespective of crystal structures.

本文言語English
ページ(範囲)2462-2465
ページ数4
ジャーナルSynthetic Metals
103
1-3
DOI
出版ステータスPublished - 1999 6月 24
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 材料化学
  • ポリマーおよびプラスチック

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