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arXiv · 0901.0124

A new mechanism of electric dipole spin resonance: hyperfine coupling in quantum dots

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

A recently discovered mechanism of electric dipole spin resonance, mediated by the hyperfine interaction, is investigated experimentally and theoretically. The effect is studied using a spin-selective transition in a GaAs double quantum dot. The resonant frequency is sensitive to the instantaneous hyperfine effective field, revealing a nuclear polarization created by driving the resonance. A device incorporating a micromagnet exhibits a magnetic field difference between dots, allowing electrons in either dot to be addressed selectively. An unexplained additional signal at half the resonant frequency is presented.

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E. A. Laird, C. Barthel, E. I. Rashba, C. M. Marcus, M. P. Hanson, A. C. Gossard. 2008-12-31. A new mechanism of electric dipole spin resonance: hyperfine coupling in quantum dots. https://doi.org/10.1088/0268-1242%2F24%2F6%2F064004

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