Abstract
Using a third generation synchrotron, the low-energy electronic structure of was measured by nonresonant inelastic x-ray scattering. The cross section at reveals a significant peak at inaccessible to optical absorption due to selection rules but consistent with measurements done by nonlinear optics and electron energy-loss spectroscopy. The experiment was modeled by a Hubbard model for a single molecule with . This simple model captures the essential physics.
- Received 8 August 2007
DOI:https://doi.org/10.1103/PhysRevB.77.073406
©2008 American Physical Society