Charge and spin configurations in the coupled quantum dots with Coulomb   correlations induced by tunneling current
  We investigated the peculiarities of non-equilibrium charge states and spin configurations in the system of two strongly coupled quantum dots (QDs) weakly connected to the electrodes in the presence of Coulomb correlations. We analyzed the modification of non-equilibrium charge states and different spin configurations of the system in a wide range of applied bias voltage and revealed well pronounced ranges of system parameters where negative tunneling conductivity appears due to the Coulomb correlations. 
P. I. Arseyev, N. S. Maslova, V. N. Mantsevich
cond-mat.mes-hall