Abstract

A selective review is presented of recent progress toward understanding the electronic properties of graphite intercalation compounds. Topics covered include (1) correlation between atomic bonding and anisotropic conductivity, which argues that donor and acceptor compounds are fundamentally different; (2) a rigid-band theory of dilute compounds which suggests experiments to determine the fraction of a mobile charge carrier per intercalant; (3) transport and optical properties of concentrated donor compounds, which reveal that C 8M and C 24M compounds are semimetals, not simple electron conductors; (4) speculations and preliminary experimental results which are relevant to the superacid/high conductivity hypothesis.

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