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

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

2002-09-04

arxiv.org/abs/cond-mat/0209087v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 8 figures. For better quality figures, download http://www.fyslab.hut.fi/~tto/cylart1.pdf

Scientific paper

10.1103/PhysRevB.66.235420

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.

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