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

doi:10.1103/PhysRevLett.104.236802

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 language	English (US)
Article number	236802
Journal	Physical review letters
Volume	104
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.104.236802
State	Published - Jun 8 2010

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.104.236802

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AU - Hanson, M. P.

AU - Gossard, A. C.

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AB - 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.

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Exchange control of nuclear spin diffusion in a double quantum dot

Abstract

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