Topological acoustics is an emerging field that lies at the intersection of condensed matter
physics, mechanical structural design and acoustics engineering. It explores the design and …

Light and sound are the most ubiquitous forms of waves, associated with a variety of
phenomena and physical effects such as rainbows and echoes. Light and sound, both …

The topological properties of an object, associated with an integer called the topological
invariant, are global features that cannot change continuously but only through abrupt …

Phonons, as the most fundamental emergent bosons in condensed matter systems, play an
essential role in the thermal, mechanical, and electronic properties of crystalline materials …

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

Discovering new topological phases of matter is a major theme in fundamental physics and
materials science. Dirac semimetal provides an exceptional platform for exploring …

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

We propose and experimentally demonstrate the first example of Chern fractal insulators in
an acoustic Sierpinski lattice. Through introducing fractality into the well-known Haldane …

Unconventional Weyl phonons with higher topological charges in crystalline solids have
attracted increasing attention. By symmetry analysis and a low-energy k· p effective …

We propose topological metamaterials working in Hertz frequency range, constituted of
concrete pillars on the soil ground in a honeycomb lattice. Based on the analog of the …