title: Experimental and theoretical improvements on understanding of the O K-edge of TeO2.
abstract: Using an electron monochromator attached to an electron microscope, high energy-resolution electron energy-loss spectra collected from TeO2 have revealed new features in the Oxygen K-edge. Using density-functional theory in the local density and the generalized gradient approximation, we find that core-hole strength of 1.3 gives an excellent fit to our high-resolution experimental data. This indicates that screening is not weak in this oxide, as normally assumed, and that neither the ground state nor a full core-hole model is adequate in quantitative reproduction of the O K-edge in the TeO2 system.
authors.affiliation: Department of Physics and Astronomy, Arizona State University, Tempe, AZ 85287-1504, USA. nan.jiang@asu.edu
authors.forename: Nan
authors.initials: N
authors.lastname: Jiang
authors.forename: Bin
authors.initials: B
authors.lastname: Jiang
authors.forename: Rolf
authors.initials: R
authors.lastname: Erni
authors.forename: Nigel D
authors.initials: ND
authors.lastname: Browning
authors.forename: John C H
authors.initials: JC
authors.lastname: Spence