Spin imaging of Poiseuille flow of viscous electronic fluid
arXiv:2205.02647 · doi:10.1103/PhysRevB.106.L081113
Abstract
Recent progress in fabricating high-quality conductors with small densities of defects has initiated the studies of the viscous electron fluid and has motivated the search for the evidences of the hydrodynamic regime of electron transport. In this work we come up with the spin imaging technique allowing us to attest to the emergence of electron hydrodynamic flows. Based on numerical calculations we demonstrate that the injected electron spin density is inhomogeneous across the channel when the viscous electron fluid forms the Poiseuille flow. We also argue that the Hanle curves at different positions across the channel acquire relative phase shifts resulting from the variation of the electron drift velocity in inhomogeneous hydrodynamic flows. The studied effects can be employed to evidence and study the viscous electron fluid non-invasively.
5 pages, 4 figures
References in corpus (14)
- Hydrodynamics of electrons in graphene
- Nanosecond spin lifetimes in single- and few-layer graphene-hBN heterostructures at room temperature
- Spin transport in high quality suspended graphene devices
- Magnetoresistance due to edge spin accumulation
- Non-local transport and the Hall viscosity of 2D hydrodynamic electron liquids
- Geometric control of universal hydrodynamic flow in a two dimensional electron fluid
- Colossal negative magnetoresistance in a 2D electron gas
- Theory of spin hydrodynamic generation
- Giant microwave photoresistivity in a high-mobility quantum Hall system
- Stokes paradox in electronic Fermi liquids
- Evidence for local spots of viscous electron flow in graphene at moderate mobility
- The photoresponse of a two-dimensional electron gas at the second harmonic of the cyclotron resonance
- Valley and spin accumulation in ballistic and hydrodynamic channels
- Spin hydrodynamic generation in graphene