Elasticity typically refers to a material's ability to store energy, whereas viscosity refers to a
material's tendency to dissipate it. In this review, we discuss fluids and solids for which this is …

As high-quality single-crystal materials used in electronic devices approach the microscale
and nanoscale, charge-transport phenomena in these devices result in inhomogeneous …

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 …

An electrical conductor subjected to a magnetic field exhibits the Hall effect in the presence
of current flow. Here, we report a qualitative deviation from the standard behavior in electron …

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 …

Quasiparticles with fractional charge and fractional statistics are key features of the fractional
quantum Hall effect. We discuss in detail the definitions of fractional charge and statistics …

Broken time-reversal and parity symmetries in active spinner fluids imply a nondissipative
“odd viscosity,” engendering phenomena unattainable in traditional passive or active fluids …

The recent realization of twisted, two-dimensional, bilayers exhibiting strongly correlated
states has created a platform in which the relation between the properties of the electronic …

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 …

In common fluids, viscosity is associated with dissipation. However, when time-reversal
symmetry is broken a new type of nondissipative “viscosity” emerges. Recent theories and …