Transport and resonance phenomena through a single nonlinear impurity

Using the Discrete Nonlinear Schrödinger Equation (DNLSE) we study numerically the transmission properties through a single nonlinear impurity connected to two linear one-dimensional tight-binding leads. We consider the effect of the bonding between the leads and the localized impurity on both the transmission resonant energies and self trapping in the presence of both local Coulomb-like nonlinear interaction and a magnetic field which lifts the spin degeneracy at the impurity site.