Spin-orbit-induced hole spin relaxation in a quantum dot molecule: the effect of s-p coupling

We study the effect of the coupling between the hole s shell of one quantum dot and the p shell in the other dot forming a vertically stacked self-assembled quantum dot molecule on the spin relaxation between the sublevels of the hole s state. Using an effective model that captures the spin-orbit ef...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2019-09, Vol.31 (35), p.355304-355304
Main Authors: Kawa, Karol, Machnikowski, Pawe
Format: Article
Language:English
Subjects:
phonons
quantum dot molecule
spin relaxation
spin-orbit coupling
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Summary:We study the effect of the coupling between the hole s shell of one quantum dot and the p shell in the other dot forming a vertically stacked self-assembled quantum dot molecule on the spin relaxation between the sublevels of the hole s state. Using an effective model that captures the spin-orbit effects in the p shell irrespective of their origin, we show that the strong spin mixing in the p shell can be transferred to the s shell of the other dot, leading to enhanced spin relaxation in a certain energy range around the s-p resonance if the dots are misaligned and the magnetic field is tilted from the sample plane.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/ab243d