Premium
Surface energies of simple metals (I)
Author(s) -
Paasch G.,
Hietschold M.
Publication year - 1975
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.2220670238
Subject(s) - dipole , electron , work function , surface (topology) , specific surface energy , condensed matter physics , fermi gas , work (physics) , electron density , surface energy , plane (geometry) , relaxation (psychology) , ion , simple (philosophy) , lattice (music) , atomic physics , materials science , physics , metal , thermodynamics , quantum mechanics , geometry , mathematics , philosophy , epistemology , psychology , social psychology , acoustics , metallurgy
The surface energy and the dipole barrier are calculated for eleven simple metals. The potential of the positive ions is replaced by Ashcroft‐model potentials. The decrease of the electron density at the surface and the relaxation of the top lattice plane are described by two parameters. Using the theory of the inhomogeneous electron gas the surface energy is calculated and minimized with respect to the surface parameters. The influence of the inhomogeneity of the electron density on the exchange and correlation energy has to be taken into account in order to obtain reasonable results for both the surface energy and the dipole contribution to the work function.