Model study of adsorbed metallic quantum dots: Na on Cu(111)

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2002
Major/Subject
Mcode
Degree programme
Language
en
Pages
235420/1-10
Series
Physical Review B, Volume 66, Issue 23
Abstract
We model electronic properties of the second-monolayer Na adatom islands (quantum dots) on the Cu(111) surface covered homogeneously by the first Na monolayer. An axially symmetric three-dimensional jellium model, taking into account the effects due to the first Na monolayer and the Cu substrate, has been developed. The electronic structure is solved within the local-density approximation of the density-functional theory using a real-space multigrid method. The model enables the study of systems consisting of thousands of Na atoms. The results for the local density of states are compared with differential conductance (dI/dV) spectra and constant current topographs from scanning tunneling microscopy.
Description
Keywords
Na atom islands, Na monolayer
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Citation
Torsti, T. & Lindberg, V. & Puska, Martti J. & Hellsing, B. 2002. Model study of adsorbed metallic quantum dots: Na on Cu(111). Physical Review B. Volume 66, Issue 23. 235420/1-10. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.66.235420.