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Spin-polarized multiexcitons in quantum dots in the presence of spin-orbit interaction.
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . Jul2011, Vol. 84 Issue 4, p45312:1-45312:6. 6p. - Publication Year :
- 2011
-
Abstract
- An 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 84
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 66737464
- Full Text :
- https://doi.org/10.1103/PhysRevB.84.045312