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Title
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The breakdown of Kohn's theorem in few-electron parabolic quantum dots doped with a single magnetic impurity
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Author
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Abstract
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| The cyclotron resonance (CR) absorption spectrum is calculated for a II-VI parabolic quantum dot (QD) containing few electrons and a single magnetic dopant (Mn(2+)). We find that Kohn's theorem no longer holds for this system and that the CR spectrum depends on the number of electrons inside the QD. The electron-Mn-ion interaction strength can be tuned for example by the magnetic field and by moving the Mn-ion to different positions inside the QD. We demonstrate that due to the presence of the Mn-ion the relative motion of the electrons couple with their center-of-mass motion through the electron-Mn-ion spin-spin exchange term resulting in an electron-electron interaction dependence of the magneto-optical absorption spectrum. At the ferromagnetic-antiferromagnetic transition we observe significant discontinuities in the CR lines. |
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Language
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English
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Source (journal)
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Journal of physics : conference series. - Bristol, 2004, currens
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Source (book)
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Conference on Quantum Dots 2010 (QD2010), APR 26-30, 2010, Nottingham, ENGLAND
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Publication
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Bristol
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Institute of Physics Publishing
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2010
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ISSN
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1742-6588
[print]
1742-6596
[online]
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DOI
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10.1088/1742-6596/245/1/012031
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Volume/pages
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245
(2010)
, p. 1-4
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Article Reference
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012031
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ISI
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000294907400031
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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