We consider the steady-state nonequilibrium physics of the multichannel interacting resonant-level model in the weak coupling regime. By using the scattering state method we show in agreement with the rate equations that the negative differential conductance at large enough voltages is due to the renormalization of the hopping amplitude and neither the orthogonality catastrophe nor the voltage dependence of the density of states at the resonant-level. The moderate role of the voltage dependence of the density of states on the dot is also discussed.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Apr 13 2010|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics