Abstract
The x-ray absorption near-edge structures (XANES) and electron energy loss near-edge structures (ELNES) of transition metal (TM) oxides are systematically calculated by the ab initio charge transfer multiplet (CTM) method using fully relativistic molecular spinors on the basis of density-functional theory. The electronic excitation from molecular spinors mainly composed of O- to those of TM-, that is, charge transfer, is included by considering additional electronic configurations in the configuration interactions. The effects of the covalency and charge transfer on the TM- XANES are investigated in detail. The power of the ab initio CTM method to quantitatively reproduce the spectra is demonstrated. Meanwhile, limitations of the application of the method are discussed.
2 More- Received 13 January 2011
DOI:https://doi.org/10.1103/PhysRevB.83.155107
©2011 American Physical Society