Quantitative local structure determination in mica crystals: ab initio simulations of polarization XANES at the potassium K-edge

Angle-resolved XANES at the potassium K-edge and single-crystal X-ray diffraction experiments are combined to characterize structural distortions and compositional disorder of micas. Full-multiple-scattering XANES analysis is presented and limitations of the muffin-tin potential in layered systems are discussed.

Quantum critical point in SmO_1−xF_xFeAs and oxygen vacancy induced by high fluorine dopant

The local lattice and electronic structure of the high-T_c superconductor SmO_1–xF_xFeAs as a function of F-doping have been investigated by Sm L₃-edge X-ray absorption near-edge structure and multiple-scattering calculations.