Pinned Magnetic Impurity Levels in Doped Quantum Dots

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dc.creatorNorberg, Nick S.
dc.creatorDalpian, Gustavo M.
dc.creatorChelikowsky, James R.
dc.creatorGamelin, Daniel R.
dc.date2006-08-31
dc.date.accessioned2026-07-07T07:19:55Z
dc.date.available2026-07-07T07:19:55Z
dc.descriptionSpectroscopic data demonstrate that impurity D/A levels in doped semiconductor nanostructures are energetically pinned, resulting in variations in D/A binding energies with increasing quantum confinement. Using magnetic circular dichroism spectroscopy, the donor binding energies of Co2+ ions in colloidal ZnSe quantum dots have been measured as a function of quantum confinement and analyzed in conjunction with ab initio density functional theory calculations. The resulting experimental demonstration of pinned impurity levels in quantum dots has far-reaching implications for physical phenomena involving impurity-carrier interactions in doped semiconductor nanostructures, including in the emerging field of semiconductor spintronics where magnetic-dopant-carrier exchange interactions define the functionally relevant properties of diluted magnetic semiconductors.
dc.description18 pages, 4 figures, submitted for publication
dc.identifierhttps://arxiv.org/abs/cond-mat/0608734
dc.identifierhttp://arxiv.org/abs/cond-mat/0608734
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/114806
dc.subjectMaterials Science
dc.titlePinned Magnetic Impurity Levels in Doped Quantum Dots
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