Can Dirac fluid in graphene be made more perfect?

TL;DR

This paper investigates how applying strain to graphene affects its electronic viscosity, revealing that strain reduces viscosity and could enable turbulence in graphene's electron fluid, advancing understanding of Dirac fluid behavior.

Contribution

It introduces a model linking strain and velocity gradients to viscosity changes in graphene's Dirac fluid, highlighting potential for turbulence.

Findings

Viscosity decreases with applied strain

Reynolds number increases significantly under strain

Potential for turbulence manifestation in strained graphene

Abstract

To answer this question, we discuss the properties of electronic viscosity in deformed graphene by introducing strain and velocity gradient as pseudo-magnetic and pseudo-electric fields, respectively, into the Dirac model. We found that viscosity decreases with applied strain, simultaneously leading to a rather significant increase of the Reynolds number and enabling a real possibility for manifestation of noticeable turbulent effects in strained graphene.