The last few years have seen an explosion of interest in hydrodynamic effects in interacting
electron systems in ultra-pure materials. One such material, graphene, is not only an …

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 …

In this work we consider the hydrodynamic behavior of a coupled electron–phonon fluid,
focusing on electronic transport under the conditions of strong phonon drag. This regime …

In an idealized infinite crystal, the material properties are constrained by the symmetries of
the unit cell. The point-group symmetry is broken by the sample shape of any finite crystal …

Metallic delafossites are fascinating layered materials with exceptionally high electrical
conductivity and surface polarity. The high conductivity is produced by the two-dimensional …

The observation of extraordinarily high conductivity in delafossite-type PdCoO2 is of great
current interest, and there is some evidence that electrons behave like a fluid when flowing …

We construct and analyze a lattice generalization of the Yukawa-Sachdev-Ye-Kitaev model,
where spinful fermions experience onsite, random, all-to-all interactions with an Einstein …

Geometric electron optics may be implemented in solids when electron transport is ballistic
on the length scale of a device. Currently, this is realized mainly in 2D materials …

A wide range of unconventional transport phenomena has recently been observed in single-
crystal delafossite metals. Here, we present a theoretical framework to elucidate electron …

The electrodynamic response of ultrapure materials at low temperatures becomes spatially
nonlocal. This nonlocality gives rise to phenomena such as hydrodynamic flow in transport …