Relativistic photoemission theory for general nonlocal potentials

Details Relativistic photoemission theory for general nonlocal potentials Relativistic photoemission theory for general nonlocal potentials

1999-08-20

arxiv.org/abs/cond-mat/9908294v1

phys. stat. sol. (b) 216, 1023 (1999)

Physics

Condensed Matter

Strongly Correlated Electrons

LaTeX, 18 pages, no figure

Scientific paper

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.

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