Angle-resolved ultraviolet photoemission study of first stage alkali-metal graphite intercalation compounds

N. Gunasekara, Takashi Takahashi, F. Maeda, T. Sagawa, H. Suematsu

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33 Citations (Scopus)

Abstract

The electronic band structure of the first stage alkali-metal graphite intercalation compounds (C8K, C8Rb and C8Cs) was determined by angle-resolved ultraviolet photoelectron spectroscopy. The dispersive feature of the π* bands at {Mathematical expression} point in the Brillouin zone was clearly observed in all the compounds. The electron occupancies in the π* band of C8K, C8Rb and C8Cs were estimated to be 0.5±0.05 e (e; unit electronic charge), 0.45±0.05 e and 0.4±0.05 e, respectively. This strongly suggests that another half of the unit electronic charge is accommodated in the three-dimensional band at Γ point, which forms a spherical Fermi surface at the center of the Brillouin zone. The character of the three-dimensional band at Γ point was also discussed.

Original languageEnglish
Pages (from-to)349-355
Number of pages7
JournalZeitschrift für Physik B Condensed Matter
Volume70
Issue number3
DOIs
Publication statusPublished - 1988 Sep 1

ASJC Scopus subject areas

  • Condensed Matter Physics

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