Angle-resolved ultraviolet photoelectron spectroscopy has been performed for a C8K single crystal. The dispersive π*-band near the [formula omitted] point and the so-called K 4s band around the Γ point are experimentally identified. The experimentally determined band structure has been compared with two different band calculations to discuss the charge transfer in C8K. The observed difference in the spectral feature of the ‘K 4s’ band between the experiment and the calculation are also discussed.
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