Abstract
The dynamical-mean-field method is applied to investigate the transport properties of heterostructures
consisting of metallic leads and a sample in which electrons strongly interact with each other.
The coupling with the leads always generates finite spectral weight inside the correlated region.
The spectral shape is sensitive to the change of bias voltage and interaction.
Because of this sensitivity and interplay between injected carriers and Mott physics,
current vs. voltage characteristics of such heterostructures are in general nonlinear.
This nonlinear transport was found rather insensitive to the detail of potential profile inside the sample,
while the electronic properties depend on the potential.
In some case, applied bias voltage brings about gapped spectral functions
similar to what is observed in a correlation-induced Mott insulator.
