Unpinning of heavy hole spin in magnetic quantum dots
Author
Dinu, I. V.
Moldoveanu, V.
Dragomir, R.
Tanatar, Bilal
Date
2017Source Title
Physica Status Solidi (B) Basic Research
Print ISSN
0370-1972
Publisher
Wiley-VCH Verlag
Volume
254
Issue
5
Pages
1600800-1 - 1600800-4
Language
English
Type
ArticleItem Usage Stats
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Abstract
Using the k · p theory and configuration interaction method, we analyze the effect of heavy hole–light hole (HH–LH) mixing in CdTe quantum dots (QDs) with a single manganese (Mn) ion. We find that the hole-Mn exchange switches the coupling between two excitons whose Luttinger spinors have both HH and LH components. If the magnetic dopant is off-centered and the QD is subjected to a single π pulse the system periodically bounces between bright and dark mostly HH excitons with opposite HH spins. A pump-and-probe setup allows to estimate the efficiency of this HH spin unpinning from the biexciton response. The biexciton absorption spectrum is also discussed.