We study few-electron GaAs quantum dot devices designed for generating a local AC magnetic field (~mT) in order to realize single-electron spin resonance. The AC magnetic field is induced by an AC current driven through a metal line in the vicinity of the dot. The Landé g-factor in the quantum dot is derived from the large (~T) in-plane magnetic field evolution of the Zeeman splitting observed in both Coulomb peak spacings and Coulomb diamonds. The obtained g-factor (|g| = 0.23) is significantly smaller than that for bulk GaAs. We measure electron transport through the dot for various AC currents and find evidence for the presence of an AC electric field in the form of photon assisted tunneling and current rectification. So far, we cannot confirm any effect of the AC magnetic field.
|Title of host publication||Realizing Controllable Quantum States|
|Subtitle of host publication||Mesoscopic Superconductivity and Spintronics - In the Light of Quantum Computation|
|Publisher||World Scientific Publishing Co.|
|Number of pages||6|
|Publication status||Published - 2005 Jan 1|
ASJC Scopus subject areas
- Physics and Astronomy(all)