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:
Journal Article
Journal or Publication Title:
Physical review B
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
57043
Deposited By:
Deposited On:
31 Aug 2012 10:45
Refereed?:
Yes
Published?:
Published
Last Modified:
19 Nov 2020 10:17