The quantum Hall (QH) effect, quantized Hall resistance combined with zero longitudinal
resistance, is the characteristic experimental fingerprint of Chern insulators—topologically …

The Hall effect, in which a current flows perpendicular to an electrical bias, has been
prominent in the history of condensed matter physics. Appearing variously in classical …

The intricate interplay between non-trivial topology and magnetism in two-dimensional
materials can lead to the emergence of interesting phenomena such as the quantum …

The “magnetoelectric effect” arises from the coupling between magnetic and electric
properties in materials. The Z 2 invariant of topological insulators (TIs) leads to a quantized …

Axions are hypothetical particles that were proposed to solve the strong charge–parity
problem in high-energy physics. Although they have long been known in quantum field …

An axion insulator is a correlated topological phase, which is predicted to arise from the
formation of a charge-density wave in a Weyl semimetal,—that is, a material in which …

A quantum anomalous Hall (QAH) insulator coupled to an s-wave superconductor is
predicted to harbor chiral Majorana modes. A recent experiment interprets the half …

Materials in which quantum mechanical effects lead to novel properties on the macroscopic
scale are of interest both fundamentally and for applications. For such quantum materials …

Antiferromagnetically doped topological insulators (ATI) are among the candidates to host
dynamical axion fields and axion polaritons, weakly interacting quasiparticles that are …

The long fascination that antiferromagnetic materials has exerted on the scientific community
over about a century has been entirely renewed recently with the discovery of several …