Influence of shape of quantum dots on their far-infrared absorption

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We investigate the effects of the shape of quantum dots on their far-infrared absorption in an external magnetic field by a model calculation. We focus our attention on dots with a parabolic confinement potential deviating from the common circular symmetry, and dots having circular doughnut shape. For a confinement where the generalized Kohn theorem does not hold we are able to interprete the results in terms of a mixture of a center-of-mass mode and collective modes reflecting an excitation of relative motion of the electrons. The calculations are performed within the time-dependent Hartree approximation and the results are compared to available experimental results.
RevTeX, 16 pages with 10 postscript figures included. Submitted to Phys. Rev. B

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/29481

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9907216
 http://arxiv.org/abs/cond-mat/9907216
 Phys. Rev. B 60, 16591 (1999)
 doi:10.1103/PhysRevB.60.16591

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arXiv