Exchange control of nuclear spin diffusion in a double quantum dot

D. J. Reilly, J. M. Taylor, J. R. Petta, C. M. Marcus, M. P. Hanson, A. C. Gossard

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Abstract

The influence of gate-controlled two-electron exchange on the relaxation of nuclear polarization in small ensembles (N∼106) of nuclear spins is examined in a GaAs double quantum dot system. Waiting in the (2,0) charge configuration, which has large exchange splitting, reduces the nuclear diffusion rate compared to that of the (1,1) configuration. Matching exchange to Zeeman splitting significantly increases the nuclear diffusion rate.

Original languageEnglish (US)
Article number236802
JournalPhysical review letters
Volume104
Issue number23
DOIs
StatePublished - Jun 8 2010

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Reilly, D. J., Taylor, J. M., Petta, J. R., Marcus, C. M., Hanson, M. P., & Gossard, A. C. (2010). Exchange control of nuclear spin diffusion in a double quantum dot. Physical review letters, 104(23), [236802]. https://doi.org/10.1103/PhysRevLett.104.236802