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

In the recent years, the thermal Hall transport has risen as an important diagnosis of the
physical properties of the elementary excitations in various quantum materials, especially …

The honeycomb magnet α-RuCl3 has attracted considerable interest because it is proximate
to the Kitaev Hamiltonian whose excitations are Majoranas and vortices. The thermal Hall …

A key feature of quantum spin liquids is the predicted formation of fractionalized excitations.
They are expected to produce changes in the physical response, providing a way to observe …

In transition-metal compounds with partially filled 4 d and 5 d shells spin–orbit
entanglement, electronic correlations, and crystal-field effects conspire to give rise to a …

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 …

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 …

Antiferromagnetic skyrmion crystals are magnetic phases predicted to exist in
antiferromagnets with Dzyaloshinskii-Moriya interactions. Their spatially periodic …

Condensed matter systems admit topological collective excitations above a trivial ground
state, an example being Chern insulators formed by Dirac bosons with a gap at finite …

An external magnetic field can induce a transition in α-RuCl 3 from an ordered zigzag state
to a disordered state that is possibly related to the Kitaev quantum spin liquid. Here, we …