Use of general potentials in multiple-scattering theory
- 1 December 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 34 (6), 4682-4694
- https://doi.org/10.1103/physreva.34.4682
Abstract
A mathematically transparent derivation of the multiple-scattering equations valid for a general non-muffin-tin potential, as applied to clusters of atoms with and without a surrounding outer sphere, is presented. These equations are shown to be a natural generalization of the analogous equations valid for muffin-tin potentials. An expression for the photoabsorption and electron scattering cross section in the framework of the multiple-scattering theory valid for a general potential is derived for what may be the first time, providing the necessary generalization for the similar expression valid in the muffin-tin case. A connection with the Green-function approach to the problem is also established via a generalized optical theorem.Keywords
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