Anisotropy of spin–orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dots
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
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Title
Anisotropy of spin–orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dotsDate
2015Publisher
IOP PublishingISSN
1367-2630Bibliographic citation
SEGARRA, C., et al. Anisotropy of spin–orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dots. New Journal of Physics, 2015, vol. 17, no 3, p. 033014.Type
info:eu-repo/semantics/articlePublisher version
http://iopscience.iop.org/article/10.1088/1367-2630/17/3/033014/metaVersion
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Abstract
We report a systematic study of the spin relaxation anisotropy between single electron Zeeman sublevels in three-dimensional cuboidal GaAs quantum dots (QDs). The QDs are subject to an in-plane magnetic field. As the ... [+]
We report a systematic study of the spin relaxation anisotropy between single electron Zeeman sublevels in three-dimensional cuboidal GaAs quantum dots (QDs). The QDs are subject to an in-plane magnetic field. As the field orientation varies, the relaxation rate oscillates periodically, showing 'magic' angles where the relaxation rate is suppressed by several orders of magnitude. This behavior is found in QDs with different shapes, heights, crystallographic orientations and external fields. The origin of these angles can be traced back to the symmetries of the spin admixing terms of the Hamiltonian. Our results evidence that cubic Dresselhaus terms play an important role in determining the spin relaxation anisotropy, which can induce deviations of the 'magic' angles from the crystallographic directions reported in recent experiments (P Scarlino et al 2014 Phys. Rev. Lett. 113 256802). [-]
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New Journal of Physics, 2015, vol. 17, no 3Rights
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