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arXiv · 0707.0557

Hyperfine-mediated gate-driven electron spin resonance

E. A. Laird·C. Barthel·E. I. Rashba·C. M. Marcus·M. P. Hanson·A. C. Gossard
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Abstract

An all-electrical spin resonance effect in a GaAs few-electron double quantum dot is investigated experimentally and theoretically. The magnetic field dependence and absence of associated Rabi oscillations are consistent with a novel hyperfine mechanism. The resonant frequency is sensitive to the instantaneous hyperfine effective field, and the effect can be used to detect and create sizable nuclear polarizations. A device incorporating a micromagnet exhibits a magnetic field difference between dots, allowing electrons in either dot to be addressed selectively.

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E. A. Laird, C. Barthel, E. I. Rashba, C. M. Marcus, M. P. Hanson, A. C. Gossard. 2007-12-19. Hyperfine-mediated gate-driven electron spin resonance. https://doi.org/10.1103/physrevlett.99.246601

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