Ulrichs, E. and Steinebach, C. and Schüller, Christian and Heyn, Christian and Heitmann, Detlef (2000) Coulomb-interaction induced crossover from confined to bulk quantum-dot states in a magnetic field. Physica E Low-dimensional Systems and Nanostructures 6 (1-4), pp. 364-366.
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We have employed inelastic light scattering to investigate electronic excitations of quantum dots in a magnetic field. For small magnetic fields the dispersion of the single-particle excitations (SPEs) follows the Fock–Darwin behavior. But already at moderate fields of Bgreater-or-equal, slanted0.6 T the SPEs deviate from that dispersion and follow directly the cyclotron resonance. This finding is explained by Coulomb-interaction-induced formation of bulk states in the center of the dot. Self-consistent ground-state calculations within the local-density approximation reproduce this result.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller|
|Keywords:||Quantum dots; Raman scattering; Electronic excitations|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||02 Oct 2009 08:48|
|Last Modified:||02 Oct 2009 08:48|