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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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.

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Journal Article
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Physical review B
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31 Aug 2012 10:45
Last Modified:
21 Nov 2022 22:43