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

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  • E A Laird
  • C Barthel
  • E I Rashba
  • C M Marcus
  • M P Hanson
  • A C Gossard
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Article number64004
<mark>Journal publication date</mark>19/05/2009
<mark>Journal</mark>Semiconductor Science and Technology
Issue number6
Volume24
Number of pages7
Publication statusPublished
Original languageEnglish

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.