Unusual polymerization in the Li4C60 fulleride
arXiv:cond-mat/0509510 · doi:10.1103/PhysRevB.72.155437
Abstract
Li4C60, one of the best representatives of lithium intercalated fullerides, features a novel type of 2D polymerization. Extensive investigations, including laboratory x-ray and synchrotron radiation diffraction, 13C NMR, MAS and Raman spectroscopy, show a monoclinic I2/m structure, characterized by chains of [2+2]-cycloaddicted fullerenes, sideways connected by single C-C bonds. This leads to the formation of polymeric layers, whose insulating nature, deduced from the NMR and Raman spectra, denotes the complete localization of the electrons involved in the covalent bonds.
7 pages, 6 figures, RevTex4, submitted to Phys. Rev. B