Brack, M. and Winkler, P. and Murthy, M. V. N. (2008) Coupling of surface and volume dipole oscillations in C-60 molecules. INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS, 17 (1). pp. 138-150. ISSN 0218-3013,
Full text not available from this repository. (Request a copy)Abstract
We first give a short review of the "local-current approximation" (LCA), derived from a general variation principle, which serves as a semiclassical description of strongly collective excitations in finite fermion systems starting from their quantum-mechanical mean-field ground state. We illustrate it for the example of coupled translational and compressional dipole excitations in metal clusters. We then discuss collective electronic dipole excitations in C-60 molecules (Buckminster fullerenes). We show that the coupling of the pure translational mode ("surface plasmon") with compressional volume modes in the semiclasscial LCA yields semi-quantitative agreement with microscopic time-dependent density functional (TDLDA) calculations, while both theories yield qualitative agreement with the recent experimental observation of a "volume plasmon".
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SIMPLE METAL-CLUSTERS; RANDOM-PHASE APPROXIMATION; SODIUM CLUSTERS; SUM-RULES; GIANT-RESONANCES; IONIC STRUCTURE; NUCLEI; MODEL; PHOTOABSORPTION; REPRESENTATION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Alumni or Retired Professors > Group Matthias Brack |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 13 Nov 2020 12:23 |
| Last Modified: | 13 Nov 2020 12:23 |
| URI: | https://pred.uni-regensburg.de/id/eprint/31661 |
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