D. M. Zumbuhl, C. M. Marcus, M. P. Hanson, A. C. Gossard
Published 2004-08-12Version 1
Few-electron quantum dots are investigated in the regime of strong tunneling to the leads. Inelastic cotunneling is used to measure the two-electron singlet-triplet splitting above and below a magnetic field driven singlet-triplet transition. Evidence for a non-equilibrium two-electron singlet-triplet Kondo effect is presented. Cotunneling allows orbital correlations and parameters characterizing entanglement of the two-electron singlet ground state to be extracted from dc transport.
Comments: related papers available at http://marcuslab.harvard.edu
Journal: Phys. Rev. Lett. 93, 256801 (2004)
Evidence of correlation in spin excitations of few-electron quantum dots
Energy Spectra of Few-Electron Quantum Dots
Symmetry breaking and Wigner molecules in few-electron quantum dots
