Limit current density in 2D metallic granular packings

TL;DR

This study investigates the electrical conduction in 2D metallic pentagon packings, revealing two conduction regimes, a transition with memory effects, and a limit current density, advancing understanding of granular metallic systems.

Contribution

It introduces the characterization of electrical conduction regimes and identifies a limit current density in 2D metallic granular packings, highlighting the role of contact improvements.

Findings

Two distinct conduction regimes identified

Memory effects observed at the transition line

A limit current density is established

Abstract

The electrical properties 2D of packed metallic pentagons have been studied. The characterization of such metallic pentagon heaps (like $i-V$ measurements) has been achieved and has allowed to point out two distinct conduction regimes. They are separated by a transition line along which the system exhibits a memory effect behavior due to the irreversible improvement of electrical contacts between pentagons (hot spots). A limit current density has been found.