Conformation dependent magnetotransport in a single handed helical geometry

TL;DR

This paper explores how the conformation of a single-handed helical structure influences magnetotransport properties, demonstrating that mechanical deformation can control circular current, with implications for nanoscale device design.

Contribution

It introduces a conformation-dependent model of circular current in a helical geometry using a Hartree-Fock approach, highlighting the control of current via mechanical deformation.

Findings

Circular current varies significantly with geometric stretching and compression.

Proximity effects between atomic sites show notable influence on current behavior.

The system can be used to design nano-scale current-controlled devices.

Abstract

Conformation dependent circular current is investigated in a single handed helical geometry in presence of magnetic flux $\phi$ within a Hartree-Fock mean field approach. The helical model is described by a set of non-planar rings connected by some vertical bonds where each ring is formed by introducing a non-zero hopping between the atoms $a$ and $b$ as shown in Fig.1. By stretching and compressing the geometry, circular current can be regulated significantly and thus the system can be exploited to design current controlled device at the nano-scale level. The proximity effect between the atomic sites $a$ and $b$ is also discussed in detail which exhibits interesting results.