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Electron Correlations in Statistical Model and Cohesion of Solids
Author(s) -
Olszewski S.,
Dubejko M.
Publication year - 1965
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.19650090119
Subject(s) - cohesion (chemistry) , coulomb , electron , statistical theory , physics , electric potential energy , fermi gas , atomic number , atomic physics , energy (signal processing) , statistical physics , quantum mechanics , mathematics , statistics
The cohesive energy of solids of calculated by using a statistical model in which both the exchange and the Coulomb correlations are included. The model takes into account the local lowering of the electron density due to the finite volume of the exchange and coulomb correlation holes produced in the electron gas of the statistical atomic system. The cohesive energy and atomic volume are estimated numerically for elements with atomic numbers Z varying from 1 to about 30, and those are compared with the corresponding average experimental dependences on Z . Rather good agreement between theory and experiment is obtained for the cohesive energy if only the exchange correlations are considered. The introduction of the Coulomb correlations increases the cohesive energy about one third of the value obtained by the use of exchange correlations alone.