Hyperfine-mediated gate-driven electron spin resonance

Details Hyperfine-mediated gate-driven electron spin resonance Hyperfine-mediated gate-driven electron spin resonance

2007-07-04

arxiv.org/abs/0707.0557v2

Phys. Rev. Lett. 99 246601 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

related papers available at http://marcuslab.harvard.edu

Scientific paper

10.1103/PhysRevLett.99.246601

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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