Physics (Internal)

Hydrodynamic transport properties of graphene

This event is part of the Condensed Matter Theory Seminar Series.

Abstract:
We theoretically investigate the role of inelastic electron-electron scattering in transport properties in clean and slightly disordered graphene. We point out the similarity of graphene in the vicinity of its charge neutrality point with a quantum critical system and derive its hydrodynamic transport properties from a microscopic starting point. Using a microscopic approach we describe crossover behavior from the physics of the Dirac point to more conventional Fermi liquid behavior in transport properties and relations between transport coefficients, such as the Wiedemann-Frantz law, and determine the range of validity of the relativistic hydrodynamic description. Finally we comment on charge neutral graphene coming very close to the notion of a perfect fluid.