On the way to meet the experimental observation of persistent current in a mesoscopic cylinder: A mean field study

TL;DR

This study uses a Hartree-Fock mean field approach to analyze how second-neighbor hopping and Hubbard correlations influence persistent currents in disordered mesoscopic cylinders, aligning theoretical results with experimental observations.

Contribution

It introduces a combined effect of second-neighbor hopping and Hubbard correlation in modeling persistent currents, addressing previous limitations of nearest-neighbor models.

Findings

Enhanced current amplitude with second-neighbor hopping and correlations

Current amplitude comparable to experimental results

Significant impact of disorder on persistent current

Abstract

The behavior of persistent current in a mesoscopic cylinder threaded by an Aharonov-Bohm flux $\phi$ is carefully investigated within a Hartree-Fock mean field approach. We examine the combined effect of second-neighbor hopping integral and Hubbard correlation on the enhancement of persistent current in presence of disorder. A significant change in current amplitude is observed compared to the traditional nearest-neighbor hopping model and the current amplitude becomes quite comparable to experimental realizations. Our analysis is found to exhibit several interesting results which have so far remained unaddressed.