Persistent current in one-dimensional non-superconducting mesoscopic rings: effects of single hopping impurity, in-plane electric field and foreign atoms

TL;DR

This paper investigates persistent currents in one-dimensional mesoscopic rings under various conditions, including impurities, electric fields, and foreign atoms, using a tight-binding model to understand their effects on current behavior.

Contribution

It introduces a detailed analysis of how impurities, electric fields, and foreign atoms influence persistent currents in mesoscopic rings within a tight-binding framework.

Findings

Impurities significantly alter current magnitude and phase.

Electric fields modulate the persistent current strength.

Foreign atoms introduce localized states affecting current flow.

Abstract

Persistent current in one-dimensional non-superconducting mesoscopic rings threaded by a slowly varying magnetic flux $\phi$ is studied based on the tight-binding model. The behavior of the persistent current is discussed in three aspects: (a) single hopping impurity, (b) in-plane electric field and (c) in presence of some foreign atoms.