Diamagnetic and paramagnetic shifts in self-assembled InAs lateral quantum dot molecules
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Other documents of the author: Zhou, Xinran R.; Royo Valls, Miguel; Liu, Weiwen; Lee, Jihoon H.; Salamo, Gregory J.; Climente, Juan I.; Doty, Matthew F.
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comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
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Title
Diamagnetic and paramagnetic shifts in self-assembled InAs lateral quantum dot moleculesAuthor (s)
Date
2015Publisher
American Physical SocietyISSN
2469-9950; 2469-9969Type
info:eu-repo/semantics/articlePublisher version
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.205427Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
We uncover the underlying physics that explains the energy shifts of discrete states of individual InAs lateral
quantum dot molecules (LQDMs) as a function of magnetic fields applied in the Faraday geometry. We ... [+]
We uncover the underlying physics that explains the energy shifts of discrete states of individual InAs lateral
quantum dot molecules (LQDMs) as a function of magnetic fields applied in the Faraday geometry. We observe
that ground states of the LQDM exhibit a diamagnetic shift while excited states exhibit a paramagnetic shift.
We explain the physical origin of the transition between these two behaviors by analyzing the molecular exciton
states with effective mass calculations. We find that charge carriers in delocalized molecular states can become
localized in single QDs with increasing magnetic field. We further show that the net effects of broken symmetry
of the molecule and Coulomb correlation lead to the paramagnetic response. [-]
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PHYSICAL REVIEW B 91, 205427 (2015)Rights
©2015 American Physical Society
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