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Edge spin-density modes in quantum dots in a magnetic field

Biese, G. ; Ulrichs, E. ; Rolf, L. ; Schüller, Christian ; Steinebach, C. ; Bargstädt-Franke, Ch. ; Heyn, D. ; Heitmann, Detlef ; Eberl, Karl


We investigate electronic excitations in GaAs–AlGaAs quantum dots by means of resonant inelastic light scattering in the presence of an external magnetic field Image . At magnetic field Image , we observe a series of discrete electronic excitations, namely, charge-density excitations (CDEImage ) and spin-density excitations (SDEImage ), in one and the same quantum dot sample. We find at finite ...


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