Diffusion driven by temperature or concentration gradients is a fundamental mechanism of
energy and mass transport that inherently differs from wave propagation in both physical …

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 …

Abstract In 1878, Lord Rayleigh observed the highly celebrated phenomenon of sound
waves that creep around the curved gallery of St Paul's Cathedral in London,. These …

Topological photonics has attracted increasing attention in recent years due to the unique
opportunities it provides to manipulate light in a robust way immune to disorder and defects …

Topological photonics has emerged as a promising field in photonics that is able to shape
the science and technology of light. As a significant degree of freedom, valley is introduced …

Topological nanophotonics is a new avenue for exploring nanoscale systems from visible to
THz frequencies, with unprecedented control. By embracing their complexity and fully …

Photonic and phononic topological insulators (TIs) offer numerous opportunities for
manipulating light and sound with high efficiency and resiliency. On the other hand, inverse …

Topological elastic metamaterials have emerged as a new frontier in the quest of topological
phases in condensed matter physics. Their exotic topological properties open a wealth of …

Electronic properties of crystals are inherently pertained to crystalline symmetry, so that
amorphization that lowers and breaks symmetry is detrimental. One important crystalline …

Phonons are an ideal platform for realizing stable spinless two-dimensional (2D) Dirac
points because they have a bosonic nature and hard-to-break time-reversal symmetry. It …