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Title:
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Wave-vector dependence of spin and density multipole excitations in quantum dots
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Author:
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Barranco Gómez, Manuel; Colletti, Leonardo; Lipparini, Enrico; Emperador, Agustí; Pi Pericay, Martí; Serra, Llorenç
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Other authors:
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Universitat de Barcelona |
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Abstract:
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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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Subject(s):
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-Teoria del funcional de densitat
-Electrònica quàntica
-Semiconductors
-Fenòmens mesoscòpics (Física)
-Transport d'electrons
-Density functional theory
-Quantum electronics
-Semiconductors
-Mesoscopic phenomena (Physics)
-Electron transport |
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Rights:
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(c) The American Physical Society, 2000
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Document type:
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Article
Article - Published version |
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Published by:
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The American Physical Society
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