Effect of electron–electron interaction on the transport through a nano-wire

In this paper, a Green's function study of transport through a nano-wire in the presence of electron–electron interaction and external electric field is presented. The total Hamiltonian of the above problem is written in the tight binding approximation and Hubbard term is used to model the interaction between electrons in the central region. Our results show that in the interacting model, a conduction gap will open. Also, if the interaction between the electrons is strong enough, the negative differential resistance (NDR), which is related to the localization of charge, will not occur.

We study transport properties of a nano-wire in the presence of electric field and electron–electron interaction.Figure optionsDownload as PowerPoint slideHighlights
► A Green's function study of transport in a nano-device is presented.
► The electron–electron interaction is studied in the Hubbard model.
► External electric field localize electron in one side of wire.
► Electro–electron interaction screens the effect of electric field.