We review ground states and excitations of a quantum antiferromagnet on triangular and
other frustrated lattices. We pay special attention to the combined effects of magnetic field h …

We overview physical effects of exchange frustration and quantum spin fluctuations in (quasi-
) two dimensional (2D) quantum magnets (S= 1∕ 2) with square, rectangular and triangular …

The triangular lattice of S= 1/2 spins with XXZ anisotropy is a ubiquitous model for various
frustrated systems in different contexts. We determine the quantum phase diagram of the …

Magnetization plateaus in quantum magnets—where bosonic quasiparticles crystallize into
emergent spin superlattices—are spectacular yet simple examples of collective quantum …

We study the ground state properties of the Hubbard model on three-leg triangular cylinders
using large-scale density-matrix renormalization group simulations. At half-filling, we identify …

We report an excellent realization of the highly nonclassical incommensurate spin-density
wave (SDW) state in the quantum frustrated antiferromagnetic insulator Cs 2 CoBr 4. In …

Spin-1/2 Heisenberg antiferromagnets Cs 2 CuCl 4 and Cs 2 CuBr 4 with distorted triangular-
lattice structures are studied by means of electron spin resonance spectroscopy in magnetic …

We determine the quantum phase diagram of the antiferromagnetic spin-1/2 XXZ model on
the triangular lattice as a function of magnetic field and anisotropic coupling J z. Using the …

We study the excitation spectrum and dynamical response functions for several quasi-one-
dimensional spin systems in magnetic fields without dipolar spin order transverse to the …

Lattice Wigner crystal states stabilized by long-range Coulomb interactions have recently
been realized in two-dimensional moiré materials. We employ large-scale unrestricted …