Work

Driving viscous hydrodynamics in bulk electron flow in graphene using micromagnets

Year: 2024

Type: article

Abstract: We consider the hydrodynamic flow of an electron fluid in a channel formed in a two-dimensional electron gas (2DEG) with no-slip boundary conditions. To generate vorticity in the fluid, the flow is influenced by an array of micromagnets on the top of the 2DEG. We analyze the viscous boundary layer, and we demonstrate anti-Poiseuille behavior in this region. Furthermore, we predict a longitudinal voltage modulation, where a periodic magnetic field generates a voltage term periodic in the direction of transport. From an experimental point of view, we propose a method for a boundary-independent measurement of the viscosity of different electron fluids. The results are applicable to graphene away from the charge-neutrality point and to semiconductors.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.109.195402

Authors: Jack N. Engdahl, Aydın Cem Keser, Thomas Schmidt, Oleg P. Sushkov

Institutions: UNSW Sydney, Commonwealth Scientific and Industrial Research Organisation, University of Luxembourg, Victoria University of Wellington

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Centre of Excellence in Future Low-Energy Electronics Technologies, Australian Research Council

Award: G2659024479