Magnetic Response in Mesoscopic Rings and Moebius Strips: A Theoretical Study

TL;DR

This theoretical study explores how mesoscopic rings and Moebius strips respond magnetically to flux, analyzing persistent currents and susceptibility based on a tight-binding model.

Contribution

It provides a detailed numerical analysis of magnetic response in mesoscopic loop geometries, including Moebius strips, using a simple tight-binding framework.

Findings

Persistent current varies with magnetic flux and system parameters.

Magnetic susceptibility shows characteristic flux dependence.

Disorder affects the magnetic response significantly.

Abstract

We investigate magnetic response in mesoscopic rings and moebius strips penetrated by magnetic flux $\phi$. Based on a simple tight-binding framework all the calculations are performed numerically which describe persistent current and low-field magnetic susceptibility as functions of magnetic flux $\phi$, total number of electrons $N_e$, system size $N$ and disorder strength $W$. Our exact analysis may provide some important signatures to study magnetic response in nano-scale loop geometries.