X-ray Raman scattering from the carbon K edge in polymerized C60: experiment and theory

The carbon K near-edge absorption spectra of one- and two-dimensional polymerized C60 have been investigated by non-resonant inelastic scattering in the hard-x-ray regime. The observed changes in the spectra are in good agreement with simulations based on an ab initio approach using the finite-difference method, and confirm the [2 + 2] cyclo-addition picture. Our results demonstrate the value of inelastic x-ray scattering as a bulk probe of electronic structure in systems that are difficult to study with conventional x-ray absorption techniques.