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

Symmetry breaking in 2D layered materials plays a significant role in their macroscopic
electrical, optical, magnetic and topological properties, including, but not limited to, spin …

The past decade has witnessed an explosion in the field of quantum materials, headlined by
the predictions and discoveries of novel Landau-symmetry-broken phases in correlated …

The concept of valley pseudospin, labelling quantum states of energy extrema in momentum
space, is attracting attention,,,,,,,,,,,, because of its potential as a new type of information …

Moiré superlattices in twisted van der Waals materials have recently emerged as a
promising platform for engineering electronic and optical properties. A major obstacle to fully …

Graphene is an atomically thin plasmonic medium that supports highly confined plasmon
polaritons, or nano-light, with very low loss. Electronic properties of graphene can be …

Recently, we witnessed a tremendous effort to conquer the realm of acoustics as a possible
playground to test with topologically protected sound wave propagation. In this article, we …

Recently discovered, valley photonic crystals (VPCs) mimic many of the unusual properties
of two-dimensional (2D) gapped valleytronic materials,,,,,,. Of the utmost interest to optical …

Electron valley, a degree of freedom that is analogous to spin, can lead to novel topological
phases in bilayer graphene. A tunable bandgap can be induced in bilayer graphene by an …

Topological phases with insulating bulk and gapless surface or edge modes have attracted
intensive attention because of their fundamental physics implications and potential …