Temperature dependence of the pre-edge structure in the Ti K-edge x-ray absorption spectrum of rutile

Abstract

The temperature dependence of the pre-edge features in x-ray absorption spectroscopy is reviewed. Then, the temperature dependence of the pre-edge structure at the K-edge of titanium in rutile TiO(2) is measured at low and room temperature. The first two peaks grow with temperature. The fact that these two peaks also correspond to electric quadrupole transitions is explained by a recently proposed theory.

Probing Long‐Lived Plasmonic‐Generated Charges in TiO2/Au by High‐Resolution X‐ray Absorption Spectroscopy

“…The line shape of the Ti pre-edge might be also affected by temperature variations. [8] We estimated the sample heating expected in our experimental conditions and found it negligible (see Supporting Information).…”

Substitutional behavior and dielectric property of x(Na0.5K0.5)NbO3–(1−x)BaTiO3 using x-ray absorption fine structure spectroscopy

“…Pre-edge region of the XANES spectra is known to be caused by transitions of the Ti 1s electron to unoccupied states near the bottom of the conduction band. These unoccupied states originate mainly from vacant 3d atomic orbitals of the Ti atom in the compound, so that the intensity and width of the pre-edge region correlate with the occupation of the 3d band and the coordination number of neighboring atoms around the absorbing atom [15,16]. To clarify the pre-edge features labeled A, B, C, and D, which were all affected by Nb-doping, a magnified scale in the energy range between 4966 and 4981 eV is presented in Fig.…”

Pure dipole-quadrupole resonant scattering induced by thep−dhybridization of atomic orbitals in anataseTiO2

“…Another possible explanation may be found in a temperature dependence of the absorption, similar to that recently observed for the pre-edge region of the Ti K edge in rutile. 31 Details of this problem are discussed in Sec. VI.…”