This is a review of the Sachdev-Ye-Kitaev (SYK) model of compressible quantum many-
body systems without quasiparticle excitations, and its connections to various theoretical …

In traditional metals, the temperature (T) dependence of electrical resistivity vanishes at low
or high T, albeit for different reasons. Here, we review a class of materials, known as …

The anomalous Hall effect (AHE) occurs in solids with broken time-reversal symmetry,
typically in a ferromagnetic phase, as a consequence of spin-orbit coupling. Experimental …

Chiral spin textures such as skyrmions are of interest to the field of spintronics for their
potential use in future computing devices. Hall effect measurements are a simple and …

Strong electronic correlations are often associated with the proximity of a Mott-insulating
state. In recent years however, it has become increasingly clear that the Hund's rule …

SrRuO 3 is endowed with three remarkable features. First, it is a moderately correlated
material that exhibits several novel physical properties; second, it permits the epitaxial …

Metal-insulator transitions are accompanied by huge resistivity changes, even over tens of
orders of magnitude, and are widely observed in condensed-matter systems. This article …

Correlated electron fluids can exhibit a startling array of complex phases, among which one
of the more surprising is the electron nematic, a translationally invariant metallic phase with …

Strong correlations between electrons, spins and lattices—stemming from strong
hybridization between transition metal d and oxygen p orbitals—are responsible for the …

Resistivity saturation is observed in many metallic systems with large resistivities—when the
resistivity has reached a critical value, its further increase with temperature is substantially …