Dynamic nuclear polarization with single electron spins

J. R. Petta, J. M. Taylor, A. C. Johnson, A. Yacoby, M. D. Lukin, C. M. Marcus, M. P. Hanson, A. C. Gossard

Research output: Contribution to journalArticlepeer-review

115 Scopus citations


We polarize nuclear spins in a GaAs double quantum dot by controlling two-electron spin states near the anticrossing of the singlet (S) and mS=+1 triplet (T+) using pulsed gates. An initialized S state is cyclically brought into resonance with the T+ state, where hyperfine fields drive rapid rotations between S and T+, "flipping" an electron spin and "flopping" a nuclear spin. The resulting Overhauser field approaches 80 mT, in agreement with a simple rate-equation model. A self-limiting pulse sequence is developed that allows the steady-state nuclear polarization to be set using a gate voltage.

Original languageEnglish (US)
Article number067601
JournalPhysical review letters
Issue number6
StatePublished - Feb 11 2008

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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