TL;DR
This paper reviews recent progress in understanding how electrons in certain materials behave as viscous fluids, revealing hydrodynamic effects that could impact future electronic technologies.
Contribution
It introduces the emerging field of electron hydrodynamics, highlighting recent experimental and theoretical advances in viscous electron fluids.
Findings
Electrons can behave as viscous fluids under specific conditions.
Hydrodynamic effects influence electronic transport properties.
Recent experiments demonstrate viscous electron flow in materials.
Abstract
Recent advances in materials science have made it possible to achieve conditions under which electrons in metals start behaving as highly viscous fluids, "thicker than honey", and exhibit fascinating hydrodynamic effects. In this short review we provide a popular introduction to the emerging field of electron hydrodynamics.
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