This is an introductory review of the physics of quantum spin liquid states. Quantum
magnetism is a rapidly evolving field, and recent developments reveal that the ground states …

Frustrated magnets are materials in which localized magnetic moments, or spins, interact
through competing exchange interactions that cannot be simultaneously satisfied, giving rise …

Two-dimensional triangular-lattice antiferromagnets are predicted under some conditions to
exhibit a quantum spin liquid ground state with no energy barrier to create emergent …

Recent theory and experiment have revealed that strong spin–orbit coupling can have
marked qualitative effects on the band structure of weakly interacting solids, leading to 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 devise a dimensional regularization scheme for quantum field theories with a Fermi
surface to study scaling behavior of non-Fermi liquid states in a controlled approximation …

A quantum spin liquid with a spinon Fermi surface is an exotic insulator that hosts neutral
Fermi surfaces inside the insulating gap. In an external magnetic field, it has been pointed …

We present a fractionalized metallic phase which is indistinguishable from the Fermi liquid in
conductivity and thermodynamics, but is sharply distinct in one-electron properties, such as …

In this work we investigate the phase diagram of heavy (4 d and 5 d) transition-metal oxides
on the pyrochlore lattice, such as those of the form A 2 M 2 O 7, where A is a rare-earth …

The Mott transition is one of the fundamental issues in condensed matter physics, especially
in the system with antiferromagnetic long-range order. However, such a transition is rare in …