Excited states of Na nanoislands on the Cu(111) surface
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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12
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Physical Review B, Volume 75, issue 16, pp. 1-12
Abstract
Electronic states of one monolayer high Na nanoislands on the Cu(111) surface are studied as a function of the nanoisland size. Properties of nanoislands such as one-electron states, the electron density, and the associated potential are obtained self-consistently within the density-functional formalism using a one-dimensional pseudopotential for the Cu(111) substrate and the jellium model for Na. A wave packet propagation method is used to study the energies and lifetimes of quasistationary states localized at Na islands. For very large islands, island-localized states merge into the two-dimensional continuum of the Na quantum well state. Thus, we assign the quasistationary states studied as arising from the quantization of the two-dimensional quantum well continuum due to the finite island size. The scattering at the island boundaries results in the energy-conserving resonant electron transfer into the continuum of the substrate states broadening the island-localized states into resonances.Description
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Hakala, T, Puska, M J, Borisov, A G, Silkin, V M, Zabala, N & Chulkov, E V 2007, 'Excited states of Na nanoislands on the Cu(111) surface', Physical Review B, vol. 75, no. 16, 165419, pp. 1-12. https://doi.org/10.1103/PhysRevB.75.165419