Single-particle excitations and many-particle interactions in quantum wires and dots

DOI to cite this document:: 10.5283/epub.9563

Schüller, Christian ; Biese, G. ; Keller, K. ; Steinebach, C. ; Heitmann, D. ; Grambow, P. ; Eberl, K.

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Date of publication of this fulltext: 25 Sep 2009 07:59

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Abstract

We have investigated electronic excitations in GaAs-AlxGa1-xAs quantum wires, and dots by resonance Raman spectroscopy. We find for quantum dots and quantum wires three types of excitations; single-particle, spin-density, and charge-density excitations (SPE's, SDE's, and CDE's, respectively). Our experiments show that SPE's are enhanced under conditions of extreme resonance, which indicates that ...