Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2004-07-06
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
12 pages, 8 figures and 1 table. Submitted to PRB
Scientific paper
10.1103/PhysRevB.71.205401
We present a method for density-functional modeling of metallic overlayers grown on metallic supports. It offers a tool to study nanostructures and combines the power of self-consistent pseudopotential calculations with the simplicity of a one-dimensional approach. The model is applied to Pb layers grown on the Cu(111) surface. More specifically, Pb is modeled as stabilized jellium and the Cu(111) substrate is represented by a one-dimensional pseudopotential that reproduces experimental positions of both the Cu Fermi level and the energy gap of the band structure projected along the (111) direction. The model is used to study the quantum well states in the Pb overlayer. Their analysis gives the strength of the electron confinement barriers at the interface and at the surface facing the vacuum. Our results and analysis support the interpretation of the quantum well state spectra measured by the scanning tunneling spectroscopy.
Chulkov Evgueni V.
Ogando E.
Puska Martti J.
Zabala N.
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