Electron kinetics in isolated mesoscopic rings driven out of equilibrium

TL;DR

This paper develops a kinetic theory for nonlinear current response in mesoscopic metal rings under non-equilibrium conditions, accounting for electron interactions and overheating effects.

Contribution

It introduces a comprehensive kinetic framework for analyzing non-equilibrium currents in mesoscopic rings, including electron-electron and electron-phonon interactions.

Findings

Derived general expressions for DC current in non-equilibrium regimes.

Quantified contributions of external fields and intrinsic interactions to current.

Estimated overheating effects in pumped electron systems.

Abstract

Kinetic theory of nonlinear current response to an external field is developed for mesoscopic normal metal rings threaded by a magnetic flux. General expressions for direct current (DC) are derived for a non-equilibrium regime. These expressions describe simultaneously a contribution to DC made by a non-equilibrium (external) field, as well as the contribution caused by interaction with intrinsic fields. Contributions of electron-electron and electron-phonon interactions to the direct current in a non-equilibrium systems are studied. The kinetic equation for electrons in a disordered metal ring is solved with taking into account the Coulomb and electron-phonon interactions. This gives an estimate of an overheating of the pumped electron system.