Contributions to Developments of Photoelectron Spectroscopy and X-ray Absorption Fine Structure Applied to Materials Studies

This work reviews the contributions of author to developments and applications Photoelectron Spectroscopy (PES) X-ray Absorption Fine Structure (XAFS) materials studies. Focusing on Angle resolved PES (ARPES) energy distribution is discussed for angle-resolved photoemission from valence bands single crystals. The important influence spectrometer angle acceptance results (XPS) investigated in detail. Plane Density States (PDOS) introduced as a new property electronic structure. Most meaningful XAFS consist multiple-scattering anharmonic theory. Anharmonic correlated Einstein model (ACEM) Debye (ACDM) have been derived obtain Debye-Waller factors (DWF) presented terms cumulant expansion which describe thermodynamic properties effects substances contributing their accurate structural determination. effective potential (AEP) procedure first shell near neighbor approach developed include many-body one-dimensional by simple measure. Based DWFs lattice theory has studying melting curve eutectic points binary alloys. Several methods are performed good agreement calculated with experiment illustrate advantages efficiencies achieved developments.