| 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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| 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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English
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Journal of physics : conference series. - Bristol |
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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 : 2010
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| ISSN |
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1742-6588 [print]
1742-6596 [online]
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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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E-only publicatie
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| Full text (Publisher's DOI) |
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| Full text (open access) |
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