Theory of electron mediated Mn-Mn interactions in quantum dots

Theory of electron mediated Mn-Mn interactions in quantum dots

We present a theory of interaction of magnetic Mn ions depending strongly on the number (Ne) of electrons in a quantum dot. For closed electronic shells, we derive the RKKY interaction and its dependence on magnetic ion positions, quantum dot energy quantization omega0, and the number of filled shel...

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Veröffentlicht in:Physical review letters 2006-04, Vol.96 (15), p.157201-157201, Article 157201
Hauptverfasser: Qu, Fanyao, Hawrylak, Pawel
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creator Qu, Fanyao
Hawrylak, Pawel
description We present a theory of interaction of magnetic Mn ions depending strongly on the number (Ne) of electrons in a quantum dot. For closed electronic shells, we derive the RKKY interaction and its dependence on magnetic ion positions, quantum dot energy quantization omega0, and the number of filled shells Ns. For partially filled shells, the many-electron magnetopolaron effect leads to effective carrier mediated ferromagnetic Mn-Mn interactions. The dependence of the magnetopolaron energy on magnetic ion positions, quantum dot energy quantization omega0, and the number of electrons Ne is predicted.
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title Theory of electron mediated Mn-Mn interactions in quantum dots
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