Dispersion relations govern wave behaviors, and tailoring them is a grand challenge in
wave manipulation. We demonstrate the inverse design of phononic dispersion using …

A theoretical paper based on chiral micropolar effective‐medium theory suggested the
possibility of unusual roton‐like acoustical‐phonon dispersion relations in 3D elastic …

Longer-range interactions, or couplings beyond the second nearest neighbors, have long
been overlooked in topological models for either topological insulators or semimetals. For …

Previous theory and experiment has shown that introducing strong (nonlocal) beyond-
nearest-neighbor interactions in addition to (local) nearest-neighbor interactions into …

Topological insulators hold promises to realize exotic quantum phenomena in electronic,
photonic, and phononic systems. Conventionally, topological indices, such as winding …

In many cases, the hybridization of two or more excitation modes in solids has led to new
and useful dispersion relations of waves. Well‐studied examples are phonon polaritons …

We report a new method to tailor the entire two-dimensional (2D) dispersion relation based
on nonlocal phononic crystals, where beyond-nearest-neighbor (BNN) interactions are used …

Topological protection has opened new possibilities for unconventional wave guiding,
object cloaking, improved energy transport, as well as surface, edge, or corner mode …

We have performed magnetization, specific heat, and muon spin relaxation (μ SR)
measurements on single crystals of the noncentrosymmetric superconductor Ir 2 Ga 9. The …

Some popular mechanisms for restricting the diffusion of waves include introducing disorder
(to provoke Anderson localization) and engineering topologically non-trivial phases (to allow …