Spin-polarized multiexcitons in quantum dots in the presence of spin-orbit interaction

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DOIResolve DOI: http://doi.org/10.1103/PhysRevB.84.045312
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TypeArticle
Journal titlePhysical Review B - Condensed Matter and Materials Physics
ISSN1098-0121
Volume84
Issue4
Article number45312
AbstractAn efficient electron spin-relaxation mechanism has been observed in InAs quantum dots (QDs) that manifests itself as a sharp drop in the circular polarization of the light emitted by Fe spin-light emitting diodes, which incorporate a single layer of InGaAs QDs, for a narrow range of magnetic fields around 5 T. The underlying mechanism occurs when the QDs are occupied by three-electron-hole pairs forming a tri-exciton (3X) and is a two-step process. The first step involves the spin flip of one of the three electrons mediated by the spin-orbit interaction; in the second step the 3X relaxes to its ground state via phonon emission. © 2011 American Physical Society.
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LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Microstructural Sciences (IMS-ISM)
Peer reviewedYes
NPARC number21271592
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Record identifier1d5a1554-ab4f-4bc2-ac13-3201dd867ed4
Record created2014-03-24
Record modified2016-05-09
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