Modulation of circular current and associated magnetic field in a molecular junction: A new approach

TL;DR

This paper proposes a novel method to control local magnetic fields in molecular junctions by modulating circular currents through electrode coupling, offering a robust and experimentally verifiable approach.

Contribution

It introduces a new approach to regulate circular current and magnetic field in molecular junctions by adjusting electrode coupling without affecting other parameters.

Findings

Circular current can be controlled by electrode coupling strength.

Magnetic field at the molecular ring center is tunable over a wide range.

The proposed method is robust and experimentally feasible.

Abstract

A new proposal is given to control local magnetic field in a molecular junction. In presence of finite bias a net circular current is established in the molecular ring which induces a magnetic field at its centre. Allowing a direct coupling between two electrodes, due to their close proximity, and changing its strength we can regulate circular current as well as magnetic field for a wide range, without disturbing any other physical parameters. We strongly believe that our proposal is quite robust compared to existing approaches of controlling local magnetic field and can be verified experimentally.