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Work Function and Surface Structure of Simple Metals
Author(s) -
Paasch G.,
Eschrig H.,
John W.
Publication year - 1972
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.2220510129
Subject(s) - work function , work (physics) , lattice constant , lattice (music) , dipole , surface (topology) , constant (computer programming) , function (biology) , thermal conduction , simple (philosophy) , ion , thermodynamics , condensed matter physics , statistical physics , chemistry , physics , metal , mathematics , quantum mechanics , geometry , diffraction , philosophy , organic chemistry , epistemology , evolutionary biology , biology , computer science , acoustics , programming language
The work function is calculated for ten simple metals in the framework of model potentials. The Shaw model potential is used. The surface structure is described by a model containing a decrease of the conduction electron density and a change of the lattice constant. The parameters of this model are determined from the requirement of a minimum surface energy. The calculated work functions agree well with the experimental ones. The calculated increase of the lattice constant at the surface is about 1%. It gives rise to a decrease of the total surface dipole potential. The latter is much smaller than that calculated for the usual model where the ions are replaced by a homogeneous background. The agreement of the work function with experiment justifies the use of the mean value of model potentials in the calculation of physical properties.