The concept of topological energy bands and their manifestations have been demonstrated
in condensed matter systems as a fantastic paradigm toward unprecedented physical …

Phononic crystals (PnCs) control the transport of sound and heat similar to the control of
electric currents by semiconductors and metals or light by photonic crystals. Basic and …

Stable and efficient guided waves are essential for information transmission and processing.
Recently, topological valley-contrasting materials in condensed matter systems have been …

Stacking engineering in van der Waals (vdW) materials is a powerful method to control
topological electronic phases for quantum device applications. Atomic intercalation into the …

The last 20 years have witnessed growing impacts of the topological concept on the
branches of physics, including materials, electronics, photonics, and acoustics. Topology …

Inspired by the newly emergent valleytronics, great interest has been attracted to the
topological valley transport in classical metacrystals. The presence of nontrivial domain-wall …

The most useful property of topological materials is perhaps the robust transport of
topological edge modes, whose existence depends on bulk topological invariants. This …

We study acoustic topological edge modes in a honeycomb phononic crystal composed of
metallic nanopillars on a Li Nb O 3 substrate. Acoustic band calculations show that the …

In this paper, the viscoelastic effect on the topologically protected interface states in two-
dimensional (2D) solid phononic crystals (PnCs) is investigated. The valley topological …

Photonic topological insulators protected by the lattice spatial symmetry (eg, inversion and
rotation symmetry) mainly support single type edge state, interpreted by either valley or …