dorsal/arxiv
View SchemaCollectivity in the optical response of small metal clusters
| Authors | S. Kümmel, K. Andrae, P. -G. Reinhard |
|---|---|
| Categories | |
| ArXiv ID | physics/0108071 |
| URL | https://arxiv.org/abs/physics/0108071 |
| DOI | 10.1007/s003400100679 |
| Journal | Appl. Phys. B 73, 293 (2001) |
Abstract
The question whether the linear absorption spectra of metal clusters can be interpreted as density oscillations (collective ``plasmons'') or can only be understood as transitions between distinct molecular states is still a matter of debate for clusters with only a few electrons. We calculate the photoabsorption spectra of Na2 and Na5+ comparing two different methods: quantum fluid-dynamics and time-dependent density functional theory. The changes in the electronic structure associated with particular excitations are visualized in ``snapshots'' via transition densities. Our analysis shows that even for the smallest clusters, the observed excitations can be interpreted as intuitively understandable density oscillations. For Na5+, the importance of self-interaction corrections to the adiabatic local density approximation is demonstrated.
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"abstract": "The question whether the linear absorption spectra of metal clusters can be\ninterpreted as density oscillations (collective ``plasmons\u0027\u0027) or can only be\nunderstood as transitions between distinct molecular states is still a matter\nof debate for clusters with only a few electrons. We calculate the\nphotoabsorption spectra of Na2 and Na5+ comparing two different methods:\nquantum fluid-dynamics and time-dependent density functional theory. The\nchanges in the electronic structure associated with particular excitations are\nvisualized in ``snapshots\u0027\u0027 via transition densities. Our analysis shows that\neven for the smallest clusters, the observed excitations can be interpreted as\nintuitively understandable density oscillations. For Na5+, the importance of\nself-interaction corrections to the adiabatic local density approximation is\ndemonstrated.",
"arxiv_id": "physics/0108071",
"authors": [
"S. K\u00fcmmel",
"K. Andrae",
"P. -G. Reinhard"
],
"categories": [
"physics.atm-clus",
"cond-mat.mtrl-sci",
"physics.chem-ph"
],
"doi": "10.1007/s003400100679",
"journal_ref": "Appl. Phys. B 73, 293 (2001)",
"title": "Collectivity in the optical response of small metal clusters",
"url": "https://arxiv.org/abs/physics/0108071"
},
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