Simple theory of elastically deformed metals: Surface energy, stress, and work function

The effect of uniaxial strain on surface properties of simple metals is con sidered within the stabilized jellium model. The modified equations for the stabilization energy of the deformed Wigner-Seitz cells are derived as a f unction of the bulk electron density and the given deformation. The model r equires as input the density parameter r(s), the Poisson ratio, and Young's modulus of the metal. The results for surface energy, surface stress, and work function of simple metals calculated within the self-consistent Kohn-S ham method are also presented and discussed. A consistent explanation of th e independent experiments on stress-induced contact potential difference at metal surfaces is given.