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http://hdl.handle.net/2445/9828
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DC Field | Value | Language |
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dc.contributor.author | João da Providência, Jr. | cat |
dc.contributor.author | Barberán Falcón, Núria | cat |
dc.date.accessioned | 2009-10-27T14:16:50Z | - |
dc.date.available | 2009-10-27T14:16:50Z | - |
dc.date.issued | 1992 | cat |
dc.identifier.issn | 0163-1829 | cat |
dc.identifier.uri | http://hdl.handle.net/2445/9828 | - |
dc.description.abstract | Starting from the action principle, a bulk plasmon dispersion relation is obtained. We work with Slater determinants built of plane waves and consider a Hermitian generator of plasma oscillations (with well-defined q momentum) S=αQ-βP, where Q= tsum j cos(q⋅ x j ) is a time-even Hermitian generator, P=scrB tsum j [ p j ⋅q sin(q⋅ x j )+sin(q⋅ x j ) p j ⋅q] is a time-odd Hermitian generator, α(t) and β(t) are real time-dependent functions, and scrB is a real normalization constant. If the parameters α and β are small, the amplitude of the plasma oscillations generated by S is small. The quantum-mechanical action principle leads, in the harmonic approximation, to a quadratic Lagrangian L ( 2 ) (α,β) from which the dispersion relation is obtained. The nonlocal expression of the exchange contribution is explicitly obtained. The resulting bulk plasmon dispersion relation is related to the energy-weighted and cubic-energy-weighted sum rules. Finally, we compare our results with the experimental data. | - |
dc.format.extent | 3 p. | cat |
dc.format.mimetype | application/pdf | eng |
dc.language.iso | eng | eng |
dc.publisher | The American Physical Society | eng |
dc.relation.isformatof | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.45.6935 | cat |
dc.relation.ispartof | Physical Review B, 1992, vol. 45, núm. 12, p. 6935-6937. | eng |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevB.45.6935 | - |
dc.rights | (c) The American Physical Society, 1992 | eng |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Plasmons (Física) | cat |
dc.subject.classification | Relacions de dispersió | cat |
dc.subject.other | Plasmons (Physics) | eng |
dc.subject.other | Dispersion relations | eng |
dc.title | Nonlocal exchange effects on the bulk plasmon dispersion relation | eng |
dc.type | info:eu-repo/semantics/article | cat |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 60528 | ca |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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