Understanding the magnetic interactions is of fundamental importance in condensed-matter
physics as well as in the application of spintronic devices. In the past 13 years, the …

At sufficiently low temperatures, magnetic materials often enter correlated phases hosting
collective, coherent magnetic excitations such as magnons or triplons. Drawing on the …

The observation of ferromagnetic order in a monolayer of CrI 3 has been recently reported,
with a Curie temperature of 45 K and off-plane easy axis. Here we study the origin of …

The bosonic analogs of topological insulators have been proposed in numerous theoretical
works, but their experimental realization is still very rare, especially for spin systems …

In a collinear antiferromagnet with easy-axis anisotropy, symmetry guarantees that the spin
wave modes are doubly degenerate. The two modes carry opposite spin angular momentum …

Dissipation in mechanics, optics, acoustics, and electronic circuits is nowadays recognized
to be not always detrimental but can be exploited to achieve non-Hermitian topological …

Pursuing topological phases in natural and artificial materials is one of the central topics in
modern physical science and engineering. In classical magnetic systems, spin waves (or …

The Kitaev quantum spin liquid displays the fractionalization of quantum spins into Majorana
fermions. The emergent Majorana edge current is predicted to manifest itself in the form of a …

We study a spin Hamiltonian for spin-orbit-coupled ferromagnets on the honeycomb lattice.
At sufficiently low temperatures supporting the ordered phase, the effective Hamiltonian for …

Two-dimensional (2D) van der Waals (vdW) magnets have been a fertile playground for the
discovery and exploration of physical phenomena and new physics. In this Letter, we report …