On the electronic viscosity of a Dirac fluid in deformed graphene

摘要

We discuss the properties of the electronic viscosity of a Dirac fluid in deformed graphene by introducing a strain epsilon and a velocity gradient del v, as equivalent to a pseudo- magnetic B-d proportional to h epsilon and a pseudoelectric E-d proportional to h del v field respectively into the Dirac equation. It is thereby analytically established that the dynamic shear viscosity coefficient eta substantially decreases with the applied strain as eta(epsilon) = eta(0)(1 + 2 epsilon)(-3/2), reaching as much as [eta(0) - eta(epsilon)]/eta(0) similar or equal to 30% for epsilon = 0.5.