Phys. Rev. B 62, 4253–4256 (2000)Electron-spectroscopy study of LiC60: Charge transfer and dimer formationReceived 28 October 1999; revised 9 March 2000; published in the issue dated 15 August 2000 Li-C60 compounds Lix̅ C60 were studied for average Li concentration x̅ <~1 using photoelectron spectroscopy. Strong evidence is found for the formation of LiC60 dimers, as well as a second phase. The study suggests that the smallest alkali-metal Li bonds to C60 largely ionically for certain configurations. An investigation of the Li 1s level shows that under certain conditions the energetics favor a backdonation of the transferred electron to the Li ion. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.62.4253
DOI:
10.1103/PhysRevB.62.4253
PACS:
61.48.+c, 34.70.+e, 79.60.-i, 33.60.-q
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