Electronic viscosity and energy relaxation in neutral graphene
Mesoscale and Nanoscale Physics
2023-06-30 v2 Statistical Mechanics
Strongly Correlated Electrons
Abstract
We explore hydrodynamics of Dirac fermions in neutral graphene in the Corbino geometry. In the absence of magnetic field, the bulk Ohmic charge flow and the hydrodynamic energy flow are decoupled. However, the energy flow does affect the overall resistance of the system through viscous dissipation and energy relaxation that has to be compensated by the work done by the current source. Solving the hydrodynamic equations, we find that local temperature and electric potential are discontinuous at the interfaces with the leads as well as the device resistance and argue that this makes Corbino geometry a feasible choice for an experimental observation of the Dirac fluid.
Keywords
Cite
@article{arxiv.2206.07414,
title = {Electronic viscosity and energy relaxation in neutral graphene},
author = {Vanessa Gall and Boris N. Narozhny and Igor V. Gornyi},
journal= {arXiv preprint arXiv:2206.07414},
year = {2023}
}