https://doi.org/10.1140/epjb/e2015-50821-3
Regular Article
Ferromagnets-induced splitting of molecular states of T-shaped double quantum dots
Faculty of Physics, Adam Mickiewicz University,
Umultowska 85, 61-614
Poznań,
Poland
a
e-mail: kpwojcik@amu.edu.pl
Received: 27 November 2014
Received in final form: 11 February 2015
Published online: 4 May 2015
The exchange field for molecular states of double quantum dot, induced by two ferromagnets coupled to the device in T-shaped configuration, is defined and calculated. It is found, that in the regime of strong coupling between quantum dots, the dependence of the exchange field on this coupling becomes nontrivial. In particular, it changes the sign a few times to eventually vanish in the limit of infinite inter-dot coupling. The excitation energies of double quantum dot are calculated and the results used to predict the conditions for suppression of the two-stage Kondo effect in the considered nanostructure.
Key words: Mesoscopic and Nanoscale Systems
© The Author(s) 2015. This article is published with open access at Springerlink.com
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