Publication
Title
The breakdown of Kohn's theorem in few-electron parabolic quantum dots doped with a single magnetic impurity $Mn^{2+}$
Author
Abstract
 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.
Language
English
Source (journal)
Journal of physics : conference series. - Bristol
Source (book)
Conference on Quantum Dots 2010 (QD2010), APR 26-30, 2010, Nottingham, ENGLAND
Publication
Bristol : 2010
ISSN
1742-6588 [print]
1742-6596 [online]
Volume/pages
245(2010), p. 1-4
Article Reference
012031
ISI
000294907400031
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
 Faculty/Department Research group Publication type Subject Affiliation Publications with a UAntwerp address