Electrical and Thermal Transport at the Planckian Bound of Dissipation in the Hydrodynamic Electron Fluid of WP2

Understand

Materials with strongly-correlated electrons exhibit interesting phenomena such as metal-insulator transitions and high-temperature superconductivity.

• In stark contrast to ordinary metals, electron transport in these materials is thought to resemble the flow of viscous fluids.
• Despite their differences, it is predicted that transport in both, conventional and correlated materials, is fundamentally limited by the uncertainty principle applied to energy dissipation.
• Here we discover hydrodynamic electron flow in the Weyl-semimetal tungsten phosphide (WP2).