Viscous electron flow in mesoscopic two-dimensional electron gas

TL;DR

This paper demonstrates that hydrodynamic effects, specifically viscous electron flow, significantly influence transport properties in mesoscopic 2D electron gases, with experimental results aligning with theoretical predictions.

Contribution

It provides experimental evidence of viscous electron flow in mesoscopic 2D electron gases, confirming theoretical models of hydrodynamic transport.

Findings

Transport properties depend on probe configuration and geometry.

Hydrodynamic effects dominate electron transport in the studied devices.

Experimental results match theoretical predictions of viscous flow.

Abstract

We report electrical and magneto transport measurements in mesoscopic size, two-dimensional (2D) electron gas in a GaAs quantum well. Remarkably, we find that the probe configuration and sample geometry strongly affects the temperature evolution of local resistance. We attribute all transport properties to the presence of hydrodynamic effects. Experimental results confirm the theoretically predicted significance of viscous flow in mesoscopic devices.