Electron transport through a strongly correlated monoatomic chain

TL;DR

This paper investigates electron transport in a strongly correlated monoatomic chain, revealing oscillatory conductance and charge behavior, spin polarization, and the effects of Coulomb interactions using a Hubbard-like model and slave boson technique.

Contribution

It introduces an analytical and numerical study of transport in a strongly correlated monoatomic chain, highlighting oscillations and spin polarization caused by electron-electron interactions.

Findings

Oscillatory linear conductance as a function of wire length

Oscillations in electron charge distribution

Spontaneous spin polarization in the wire

Abstract

We study transport properties of a strongly correlated monoatomic chain coupled to metallic leads. Our system is described by tight binding Hubbard-like model in the limit of strong on-site electron-electron interactions in the wire. The equation of motion technique in the slave boson representation has been applied to obtain analytical and numerical results. Calculated linear conductance of the system shows oscillatory behavior as a function of the wire length. We have also found similar oscillations of the electron charge in the system. Moreover our results show spontaneous spin polarization in the wire. Finally, we compare our results with those for non-interacting chain and discuss their modifications due to the Coulomb interactions in the system.