The description of phonon heat conduction has typically been based on Fourier diffusion
theory. However, over the past three decades, a host of interesting phonon transport …

Generic interacting many-body quantum systems are believed to behave as classical fluids
on long time and length scales. Due to rapid progress in growing exceptionally pure crystals …

Vortices are the hallmarks of hydrodynamic flow. Strongly interacting electrons in ultrapure
conductors can display signatures of hydrodynamic behaviour, including negative non-local …

Abstract Electron–electron (e–e) collisions can impact transport in a variety of surprising and
sometimes counterintuitive ways,,,,,. Despite strong interest, experiments on the subject …

The “flow” of electric currents and heat in standard metals is diffusive with electronic motion
randomized by impurities. However, for ultraclean metals, electrons can flow like water with …

Highly efficient conductors are strongly desired because they can lead to higher working
performance and less energy consumption in their wide range applications. However, the …

Electrical resistance usually originates from lattice imperfections. However, even a perfect
lattice has a fundamental resistance limit, given by the Landauer conductance caused by a …

We study relativistic hydrodynamics in the presence of a non vanishing spin chemical
potential. Using a variety of techniques we carry out an exhaustive analysis, and identify the …

In metallic samples of small enough size and sufficiently strong momentum-conserving
scattering, the viscosity of the electron gas can become the dominant process governing …

Viscous electron fluids have emerged recently as a new paradigm of strongly-correlated
electron transport in solids. Here we report on a direct observation of the transition to this …