Diamagnetic and paramagnetic shifts in self-assembled InAs lateral quantum dot molecules
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Otros documentos de la autoría: Zhou, Xinran R.; Royo Valls, Miguel; Liu, Weiwen; Lee, Jihoon H.; Salamo, Gregory J.; Climente, Juan I.; Doty, Matthew F.
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
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Título
Diamagnetic and paramagnetic shifts in self-assembled InAs lateral quantum dot moleculesAutoría
Fecha de publicación
2015Editor
American Physical SocietyISSN
2469-9950; 2469-9969Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.205427Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
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. [-]
Publicado en
PHYSICAL REVIEW B 91, 205427 (2015)Derechos de acceso
©2015 American Physical Society
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