Negative Viscosity and Eddy Flow of Imbalanced Electron-Hole Liquid in Graphene
arXiv:1807.04770 · doi:10.1103/PhysRevB.99.045434
Abstract
We present a hydrodynamic theory for electron-hole magnetotransport in graphene incorporating carrier-population imbalance, energy, and momentum relaxation processes. We focus on the electric response and find that the carrier and energy imbalance relaxation processes strongly modify the shear viscosity, so that an effective viscosity can be negative in the vicinity of charge neutrality. We predict an emergent eddy flow pattern of swirling currents and explore its manifestation in nonlocal resistivity oscillations in a strip of graphene driven by a source current.
10 pages, 4 figures
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- Non-local hydrodynamic transport and collective excitations in Dirac fluids
- Vorticity of viscous electronic flow in graphene
- Hydrodynamic approach to electronic transport in graphene: energy relaxation
- Anti-Poiseuille flow in neutral graphene
- Conformal maps of viscous electron flow in the Gurzhi crossover
- Corbino magnetoresistance in neutral graphene
- Giant nonlocality in nearly compensated 2D semimetals
- Hydrodynamic Inverse Faraday Effect in Two Dimensional Electron Liquid
- Giant magnetoresistance in weakly disordered non-Galilean invariant conductors
- Nonlocal thermoelectric resistance in vortical viscous transport
- Origins of Valley Current Reversal in Partially Overlapped Graphene Layers