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- W2021330395 abstract "Abstract If the impurity pseudopotential is small, standard perturbation theory can be used to describe the effects of a dilute concentration of impurities on the conduction electrons of a simple metal. Thus, a unified approach to the calculation of scattering and of changes in energy and wavefunctions is achieved. A discussion of the relative size of the perturbation terms for all sizes of impurity potential shows that the results of the free-electron gas model need be modified only when an electron is near a Brillouin zone boundary. The results for the change in energy depend on the configuration of the impurities. We correct the results of earlier theories, and contrast them with our approach. When the impurity potential is large, scattering theory has to be used, but the results have the same form, the t-matrix replacing the impurity pseudopotential. The change in the Fermi surface is shown to be that predicted by the rigid-band model; calculations are in reasonable agreement with experiment. The spin..." @default.
- W2021330395 created "2016-06-24" @default.
- W2021330395 creator A5034762209 @default.
- W2021330395 date "1979-01-01" @default.
- W2021330395 modified "2023-10-18" @default.
- W2021330395 title "Perturbation theory for the effects of impurities on simple metals" @default.
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- W2021330395 doi "https://doi.org/10.1080/13642817908245349" @default.
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