BACKGROUND Years ago, Lev Landau taught us how to think about distinct phases of
matter through an order parameter that characterizes the symmetry-broken state relative to …

We review the interplay of frustration and strong electronic correlations in quasi-two-
dimensional organic charge transfer salts, such as (BEDT-TTF) 2 X and Et n Me 4− n Pn [Pd …

In the class of materials called spin liquids,–, a magnetically ordered state cannot be
attained even at millikelvin temperatures because of conflicting constraints on each spin; for …

YbMgGaO 4, a structurally perfect two-dimensional triangular lattice with an odd number of
electrons per unit cell and spin-orbit entangled effective spin-1/2 local moments for the Yb …

We present a theory of the thermal Hall effect in insulating quantum magnets, where the heat
current is totally carried by charge-neutral objects such as magnons and spinons. Two …

Doped Mott insulators exhibit some of the most intriguing quantum phases of matter,
including quantum spin liquids, unconventional superconductors and non-Fermi liquid …

In two-dimensional triangular lattices, geometric frustration prohibits the formation of
ordering even at the lowest temperatures, and therefore a liquid-like ground state is …

In metals, electrons in a magnetic field undergo cyclotron motion, leading to oscillations in
physical properties called quantum oscillations. This phenomenon has never been seen in a …

States of matter with a sharp Fermi surface but no well-defined Landau quasiparticles arise
in a number of physical systems. Examples include (i) quantum critical points associated …

We propose a realization of Kondo lattice physics in moiré superlattices at the interface
between a WX 2 homobilayer and Mo X 2 monolayer (X= S, Se). Under appropriate gating …