Biese, G. and Ulrichs, E. and Rolf, L. and Schüller, Christian and Steinebach, C. and Bargstädt-Franke, Ch. and Heyn, D. and Heitmann, Detlef and Eberl, Karl (1998) Edge spin-density modes in quantum dots in a magnetic field. Physica E Low-dimensional Systems and Nanostructures 2 (1-4), pp. 619-622.
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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 magnetic field, additionally to the well-known splitting of the CDEImage modes (plasmons), a quite similar splitting of the lowest SDE mode whose energy is very close to the single-particle level spacing in the quantum dot. In analogy to the edge magnetoplasmon, we call this excitation an edge spin-density mode.
|Date:||15 July 1998|
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller|
|Keywords:||Quantum dots; Electronic excitations; Raman spectroscopy|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||02 Oct 2009 08:50|
|Last Modified:||02 Oct 2009 08:50|