Wave-vector dependence of spin and density multipole excitations in quantum dots

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dc.contributor	Universitat de Barcelona
dc.contributor.author	Barranco Gómez, Manuel
dc.contributor.author	Colletti, Leonardo
dc.contributor.author	Lipparini, Enrico
dc.contributor.author	Emperador, Agustí
dc.contributor.author	Pi Pericay, Martí
dc.contributor.author	Serra, Llorenç
dc.date	2009-12-24T10:30:10Z
dc.date	2009-12-24T10:30:10Z
dc.date	2000
dc.identifier.citation	0163-1829
dc.identifier.citation	153341
dc.identifier.uri	http://hdl.handle.net/2445/10485
dc.format	9 p.
dc.format	application/pdf
dc.language.iso	eng
dc.publisher	The American Physical Society
dc.relation	Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.61.8289
dc.relation	Physical Review B, 2000, vol. 61, núm. 12, p. 8289-8297
dc.relation	http://dx.doi.org/10.1103/PhysRevB.61.8289
dc.rights	(c) The American Physical Society, 2000
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Teoria del funcional de densitat
dc.subject	Electrònica quàntica
dc.subject	Semiconductors
dc.subject	Fenòmens mesoscòpics (Física)
dc.subject	Transport d'electrons
dc.subject	Density functional theory
dc.subject	Quantum electronics
dc.subject	Semiconductors
dc.subject	Mesoscopic phenomena (Physics)
dc.subject	Electron transport
dc.title	Wave-vector dependence of spin and density multipole excitations in quantum dots
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion
dc.description.abstract	We have employed time-dependent local-spin density-functional theory to analyze the multipole spin and charge density excitations in GaAs-AlxGa1-xAs quantum dots. The on-plane transferred momentum degree of freedom has been taken into account, and the wave-vector dependence of the excitations is discussed. In agreement with previous experiments, we have found that the energies of these modes do not depend on the transferred wave vector, although their intensities do. Comparison with a recent resonant Raman scattering experiment [C. Schüller et al., Phys. Rev. Lett. 80, 2673 (1998)] is made. This allows us to identify the angular momentum of several of the observed modes as well as to reproduce their energies

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