Topological semimetals (TSMs) are characterized by bulk band crossings in their electronic
structures, which are expected to give rise to gapless electronic excitations and topological …

The study of classical wave physics has been reinvigorated by incorporating the concept of
the geometric phase, which has its roots in optics, and topological notions that were …

The topological phenomenon has been extensively studied in condensed matter physics
and has attracted much attention in many different fields. Like electrons, phonons can also …

Quantum materials hosting Weyl fermions have opened a new era of research in condensed
matter physics. First proposed in 1929 in the context of particle physics, Weyl fermions have …

Angle-resolved photoemission spectroscopy (ARPES)—an experimental technique based
on the photoelectric effect—is arguably the most powerful method for probing the electronic …

Chirality—the geometric property of objects that do not coincide with their mirror image—is
found in nature, for example, in molecules, crystals, galaxies and life forms. In quantum field …

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 …

Weyl semimetals (WSMs) exhibit phenomena such as Fermi arc surface states, pseudo-
gauge fields and quantum anomalies that arise from topological band degeneracy in …

Effective manipulation of phonons is crucial to modern energy‐information science and
technologies but limited by the charge neutral and spinless nature of phonons. Recently …

Chirality is a manifestation of the asymmetry inherent in nature. It has been defined as the
symmetry breaking of the parity of static objects, and the definition was extended to dynamic …