Quantum Transport in a Biphenyl Molecule: Effects of Magnetic Flux

TL;DR

This paper investigates how magnetic flux influences electron transport in a biphenyl molecule, revealing that flux tuning can significantly control current flow, which could aid in nano-electronic circuit design.

Contribution

It introduces a Green's function approach to analyze magnetic flux effects on electron transport in biphenyl molecules, highlighting flux as a control parameter.

Findings

Magnetic flux can significantly regulate current amplitude.

Coupling strength affects transport properties.

Flux tuning offers potential for nano-circuit control.

Abstract

Electron transport properties of a biphenyl molecule are studied based on the Green's function formalism. The molecule is sandwiched between two metallic electrodes, where each benzene ring is threaded by a magnetic flux $\phi$. The results are focused on the effects of the molecule to electrode coupling strength and the magnetic flux $\phi$. Our numerical study shows that, for a fixed molecular coupling, the current amplitude across the bridge can be {\em regulated} significantly just by tuning the flux $\phi$. This aspect may be utilized in designing nano-scale electronic circuits.