We investigate within a two-component jellium model the collective electronic excitations in a one-monolayer (1ML) potassium covered beryllium surface. The calculations of the surface dynamical response properties have been performed with one-particle energies and wave functions derived from the Kohn-Sham density-functional theory. The dispersion relation for the surface plasmon modes as well as the real and imaginary parts of the induced dynamical charge density oscillations are presented. Comparison of the collective modes in the 1ML K/Be system with that of a clean Be surface is made.
|Número de páginas||4|
|Publicación||Physica Status Solidi (C) Current Topics in Solid State Physics|
|Estado||Publicada - 1 nov 2010|
|Publicado de forma externa||Sí|