1999/07/21 by M. Barranco, Manuel Barranco, Leonardo Colletti +8 · 1 citation
Materials Science · Physics and Astronomy · #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #ZnO doping and properties #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.61.8289
published as PRB61,8289(2000) · 14 pages in REVTEX and 14 postscript figures
arxiv created 1999/07/21 · openalex publication_date 2000/03/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We have employed time-dependent local-spin density-functional theory to analyze the multipole spin and charge density excitations in GaAs\ensuremath-AlxGa_1\ensuremath-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. Sch"uller 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.