# Current enhancement due to field-induced dark carrier multiplication in graphene

## TL;DR

This paper investigates how dark carrier multiplication, driven by Auger processes in graphene, can enhance current beyond traditional expectations, especially under idealized conditions without scattering.

## Contribution

It introduces the concept of dark carrier multiplication in graphene and demonstrates its impact on current enhancement through a microscopic theoretical approach.

## Key findings

- Auger processes lead to current enhancement in graphene.
- Dark carrier multiplication prevents the carrier distribution from reaching equilibrium.
- Scattering with phonons restores a finite, yet increased, steady-state current.

## Abstract

We present a microscopic study on current generation in graphene in response to an electric field. While scattering is generally considered to reduce the current, we reveal that in graphene Auger processes give rise to a current enhancement via a phenomenon we denote dark carrier multiplication. Based on a microscopic approach, we show that, if other scattering channels are absent, this prevents the carrier distribution to reach a stationary value. Taking into account scattering with phonons a finite current is restored, however its value exceeds the stationary current without scattering.