Hyperfine-mediated gate-driven electron spin resonance.

Hyperfine-mediated gate-driven electron spin resonance.

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 in...

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Detalles Bibliográficos
Autores principales: Laird, E, Barthel, C, Rashba, E, Marcus, C, Hanson, M, Gossard, A
Formato: Journal article
Lenguaje:English
Publicado: 2007
Descripción
Sumario: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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