Research output: Contribution to Journal/Magazine › Journal article › peer-review
Article number | 195306 |
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<mark>Journal publication date</mark> | 15/11/2001 |
<mark>Journal</mark> | Physical review B |
Issue number | 19 |
Volume | 64 |
Number of pages | 4 |
Publication Status | Published |
<mark>Original language</mark> | English |
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.