Manifestations of the hyperfine interaction between electron and nuclear spins in singly-charged (In,Ga)As/GaAs quantum dots

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dc.creatorCherbunin, Roman V.
dc.creatorAuer, Thomas
dc.creatorGreilich, Alex
dc.creatorIgnatiev, Ivan V.
dc.creatorOulton, Ruth
dc.creatorBayer, Manfred
dc.creatorYakovlev, Dmitri R.
dc.creatorKozlov, Gleb G.
dc.creatorReuter, Dirk
dc.creatorWieck, Andreas D.
dc.date2008-05-21
dc.date.accessioned2026-07-07T09:40:11Z
dc.date.available2026-07-07T09:40:11Z
dc.descriptionThe nuclear spin fluctuations (NSF) as well as the dynamic nuclear polarization (DNP) and their effects on the electron spins in negatively charged (In,Ga)As/GaAs quantum dots have been studied by polarized pump-probe and photoluminescence spectroscopy techniques. The effective magnetic field of the NSF is about 30 mT at low excitation power. The NSF distribution becomes highly anisotropic at strong optical excitation by circularly polarized light with periodically alternating helicity. This phenomenon is attributed to a decrease of the nuclear spin entropy due to the hyperfine interaction with polarized electron spins. The DNP is limited to small values for intense, but short photoexcitation.
dc.description14 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/0805.3247
dc.identifierhttp://arxiv.org/abs/0805.3247
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/161404
dc.subjectMesoscale and Nanoscale Physics
dc.subjectOther Condensed Matter
dc.titleManifestations of the hyperfine interaction between electron and nuclear spins in singly-charged (In,Ga)As/GaAs quantum dots
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