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2012 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 100, no 14, p. 143105-Article in journal (Refereed) Published
Abstract [en]
Electron spin dephasing and relaxation due to hyperfine interaction with nuclear spins is studied in an InAs/GaAs quantum dot ensemble as a function of temperature up to 85 K, in an applied longitudinal magnetic field. The extent of hyperfineinduced dephasing is found to decrease, whereas dynamic nuclear polarization increases with increasing temperature. We attribute both effects to an accelerating electron spin relaxation through phonon-assisted electron-nuclear spin flip-flops driven by hyperfine interactions, which could become the dominating contribution to electron spin depolarization at high temperatures.
Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2012
National Category
Natural Sciences Condensed Matter Physics
Identifiers
urn:nbn:se:liu:diva-75095 (URN)10.1063/1.3701273 (DOI)000302567800060 ()
Note
funding agencies|Swedish Research Council| 621-2011-4254 |2012-02-162012-02-162021-12-28Bibliographically approved