Premium
Relativistic Photoemission Theory for General Nonlocal Potentials
Author(s) -
Meyer C.,
Potthoff M.,
Nolting W.,
Borstel G.,
Braun J.
Publication year - 1999
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199912)216:2<1023::aid-pssb1023>3.0.co;2-c
Subject(s) - physics , dipole , spin (aerodynamics) , space (punctuation) , discrete dipole approximation , electronic structure , general theory , quantum mechanics , classical mechanics , theoretical physics , linguistics , philosophy , thermodynamics
An improved formulation of the one‐step model of photoemission from crystal surfaces is proposed which overcomes different limitations of the original theory. Considering the results of an electronic‐structure calculation, the electronic (one‐particle) potential and the (many‐body) self‐energy, as given quantities, we derive explicit expressions for the dipole transition‐matrix elements. The theory is formulated within a spin‐polarized, relativistic framework for general nonspherical and space‐filling one‐particle potentials and general nonlocal, complex and energy‐dependent self‐energies. It applies to semi‐infinite lattices with perfect lateral translational invariance and arbitrary number of atoms per unit cell.