Quantum magnets have occupied the fertile ground between many-body theory and low-
temperature experiments on real materials since the early days of quantum mechanics …

Magnetic van der Waals (vdW) materials have opened new frontiers for realizing novel many-
body phenomena. Recently NiPS3 has received intense interest since it hosts an excitonic …

Perturbation series expansion methods are sophisticated numerical tools used to provide
quantitative calculations in many areas of theoretical physics. This book gives a …

Measuring how the magnetic correlations evolve in doped Mott insulators has greatly
improved our understanding of the pseudogap, non-Fermi liquids and high-temperature …

The magnetic excitations of the quasi-2D spin-1/2 frustrated Heisenberg antiferromagnet Cs
2 CuCl 4 are explored throughout the 2D Brillouin zone using high-resolution time-of-flight …

We study the spin-excitation spectrum (dynamic structure factor) of the spin-1/2 square-
lattice Heisenberg antiferromagnet and an extended model (the JQ model) including four …

Inelastic neutron scattering is used to investigate the collective magnetic excitations of the
high-temperature superconductor-parent antiferromagnet La 2 CuO 4. We find that while the …

We use quantum Monte Carlo (stochastic series expansion) and finite-size scaling to study
the quantum critical points of two S= 1∕ 2 Heisenberg antiferromagnets in two dimensions …

Because electrons and ions form a coupled system, it is a priori clear that the dynamics of
the lattice should reflect symmetry breaking within the electronic degrees of freedom …

Cuprates and other high-temperature superconductors consist of two-dimensional layers
that are crucial to their properties. The dynamics of the quantum spins in these layers lie at …