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Title: Wave-vector dependence of spin and density multipole excitations in quantum dots
Author: Barranco Gómez, Manuel
Colletti, Leonardo
Lipparini, Enrico
Emperador, Agustí
Pi Pericay, Martí
Serra, Llorenç
Keywords: Teoria del funcional de densitat
Electrònica quàntica
Fenòmens mesoscòpics (Física)
Transport d'electrons
Density functional theory
Quantum electronics
Mesoscopic phenomena (Physics)
Electron transport
Issue Date: 2000
Publisher: The American Physical Society
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
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 2000, vol. 61, núm. 12, p. 8289-8297
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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