Ultraviolet photoelectron spectra of C"8"4 and K"xC"8"4 - Hino, S.; Matsumoto, K.; Hasegawa, S.; Kamiya, K.; Inokuchi, H.; Morikawa, T.; Takahashi, T.; Seki, K.; Ikemoto, I.; Kikuchi, K.; Suzuki, S.; Achiba, Y. (Elsevier)
Ultraviolet photoelectron spectra of C"8"4, one of the fullerene family compounds, and of potassium-dosed C"8"4 have been measured with synchrotron radiation. The spectra of C"8"4 are compared with those of C"6"0 and C"7"0. The photoemission spectral onset of C"8"4 is 1.3 eV below the Fermi level, which is smaller by 0.5 eV than that of C"6"0 or C"7"0. This indicates its small band gap, which was expected from its absorption spectra. Upon potassium dosing, a new band becomes distinct between the Fermi level and the highest occupied molecular orbital band. The new band edge does not cross the Fermi level, which indicates that potassium-dosed C"8"4 is not metallic but a semiconductor.
http://linkinghub.elsevier.com/retrieve/pii/0009-2614(92)85320-A
Keywords: V; U