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Nucleus-mediated spin-flip transitions in GaAs quantum dots

Erlingsson, S I and Nazarov, Y V and Falko, Vladimir (2001) Nucleus-mediated spin-flip transitions in GaAs quantum dots. Physical review b, 64 (19). ISSN 1098-0121

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Abstract

Spin-flip rates in GaAs quantum dots can be quite slow, thus opening up the possibilities to manipulate spin states in the dots. We present here estimations of inelastic spin-flip rates mediated by hyperfine interaction with nuclei. Under general assumptions the nucleus-mediated rate is proportional to the phonon relaxation rate for the corresponding non-spin-flip transitions. The rate can be accelerated in the vicinity of a singlet-triplet excited state crossing. The small proportionality coefficient depends inversely on the number of nuclei in the quantum dot. We compare our results with known mechanisms of spin-flip in GaAs quantum dots.

Item Type: Article
Journal or Publication Title: Physical review b
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 57043
Deposited By: ep_importer_pure
Deposited On: 31 Aug 2012 11:45
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 23:58
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/57043

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