# Joule-Thomson Cooling in Graphene

## TL;DR

This paper explores how the Joule-Thomson effect influences electron temperature in graphene, showing cooling in the Fermi liquid regime and heating in the Dirac fluid, revealing complex thermodynamic behavior.

## Contribution

It demonstrates the occurrence of Joule-Thomson cooling and heating in graphene's electron fluid, highlighting the distinct behaviors in different regimes.

## Key findings

- Cooling in the Fermi liquid regime
- Heating in the Dirac fluid regime
- Identification of Joule-Thomson effect in graphene electrons

## Abstract

Electrons in graphene exhibit hydrodynamic behavior in a certain range of temperatures. We indicate that electric current in this regime can result in cooling of electron fluid due to the Joule-Thomson effect. Cooling occurs in the Fermi liquid regime, while for the Dirac fluid the effect results in heating.