Schüller, Christian and Biese, G. and Keller, K. and Steinebach, C. and Heitmann, D. and Grambow, P. and Eberl, K. (1996) Single-particle excitations and many-particle interactions in quantum wires and dots. Physical Review B (PRB) 54 (24), R17304-R17307.
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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 energy-density fluctuations are responsible for the excitation of unscreened SPE's. The high intensity of the SPE's allows a detailed analysis of collective effects in the zero- and one-dimensional electron systems.
|Date:||15 December 1996|
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||25 Sep 2009 07:59|
|Last Modified:||20 Jul 2011 21:45|