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Wave-vector dependence of spin and density multipole excitations in quantum dots
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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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BARRANCO GÓMEZ, Manuel, et al. Wave-vector dependence of spin and density multipole excitations in quantum dots. Physical Review B. 2000. Vol. 61, num. 12, pags. 8289-8297. ISSN 0163-1829. [consulted: 7 of August of 2026]. Available at: https://hdl.handle.net/2445/10485