Molecular wires: tuning of electron transport

TL;DR

This paper investigates how various factors like interference, chemical groups, coupling strength, and gate voltage affect electron transport in molecular wires, providing insights crucial for designing efficient molecular electronic devices.

Contribution

It offers a detailed analysis of electron transport in molecular wires using Green's function and tight-binding models, emphasizing the effects of multiple parameters and noise characteristics.

Findings

Transport properties are significantly affected by interference effects and chemical substituents.

Molecule-to-electrode coupling strength and gate voltage critically influence electron flow.

Noise power analysis reveals important electron correlation information.

Abstract

Electron transport characteristics through molecular wires are studied by using the Green's function formalism. Parametric calculations are performed based on the tight-binding model to investigate the transport properties through the wires. The transport characteristics are significantly influenced by (a) the interference effects, (b) chemical substituent group, (c) molecule-to-electrode coupling strength and (d) the gate voltage, and, here we focus our results in these aspects. In this article we also discuss the noise power of current fluctuations. The noise power gives key information about the electron correlation which is obtained by calculating the Fano factor (F) and the complete knowledge of the current fluctuations is very essential to fabricate efficient molecular devices.