Probing the spin states of three interacting electrons in quantum dots
arXiv:1109.4758 · doi:10.1103/PhysRevB.85.033307
Abstract
We observe a low-lying sharp spin mode of three interacting electrons in an array of nanofabricated AlGaAs/GaAs quantum dots by means of resonant inelastic light scattering. The finding is enabled by a suppression of the inhomogeneous contribution to the excitation spectra obtained by reducing the number of optically-probed quantum dots. Supported by configuration-interaction calculations we argue that the observed spin mode offers a direct probe of Stoner ferromagnetism in the simplest case of three interacting spin one-half fermions.
References in corpus (8)
- Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms
- Two-dimensional Mott-Hubbard electrons in an artificial honeycomb lattice
- Full configuration interaction approach to the few-electron problem in artificial atoms
- Three attractively interacting fermions in a harmonic trap: Exact solution, ferromagnetism, and high-temperature thermodynamics
- A molecular state of correlated electrons in a quantum dot
- Correlated electrons in optically-tunable quantum dots: Building an electron dimer molecule
- Imaging quasi-particle wavefunctions in quantum dots via tunneling spectroscopy
- Fractional quantum Hall effect arising from repulsive three body interaction