Premium
The effective screening function in insulating solids
Author(s) -
Duggan G.,
Morgan G. J.,
Shahtahmasebi N.,
Lettington A.
Publication year - 1977
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/pssb.2220830223
Subject(s) - simple (philosophy) , function (biology) , matrix (chemical analysis) , dielectric function , dielectric , computational physics , statistical physics , materials science , physics , chemistry , quantum mechanics , chromatography , philosophy , epistemology , evolutionary biology , biology
Numerical calculations are presented of an effective dielectric matrix which exactly defines a constituent screened ion in a perfect solid within the Hartree approximation. The accuracy of the numerical method is estimated using previous analytical calculations for a simple model. The nature of the screening charge is then considered in detail for Ge and reasonable values for the magnitude of the “forbidden reflections” are obtained. The behaviour of the screening function for a tight‐binding situation is also investigated.