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

I review my recent progress and develop a geometrical approach in the quantum with light
as a guide, from the vector potential in classical physics, revealing that topological …

It has been suggested that certain antiferromagnetic topological insulators contain axion
quasiparticles (AQs), and that such materials could be used to detect axion dark matter …

Emergent axion electrodynamics in magneto-electric media is expected to provide novel
ways to detect and control material properties with electromagnetic fields. However, despite …

Many experiments observed a metallic behavior at zero magnetic fields (antiferromagnetic
phase, AFM) in MnBi 2 Te 4 thin film transport, which coincides with gapless surface states …

Axion, first postulated as a hypothetical particle in high-energy physics, is now extended to
describe a novel topological magnetoelectric effect derived from the Chern–Simons theory …

What is" topological" about topological quantum states? How many types of topological
quantum phases are there? What is a zero-energy Majorana mode, how can it be realized in …

We study higher-form symmetries and a higher group in the low energy limit of a (3+ 1)-
dimensional axion electrodynamics with a massive axion and a massive photon. A …

The intrinsic magnetic topological insulator MnBi2Te4 provides a feasible pathway to the
high-temperature quantum anomalous Hall (QAH) effect as well as various novel topological …

Here, we show that space-time modulations provide an exciting route to realize complex
nonreciprocal couplings, and, in particular, the elusive axion response. We develop an …