Weyl and Dirac semimetals are three-dimensional phases of matter with gapless electronic
excitations that are protected by topology and symmetry. As three-dimensional analogs of …

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 physics of quantum materials is dictated by many-body interactions and mathematical
concepts such as symmetry and topology that have transformed our understanding of matter …

Weyl semimetals are crystalline solids that host emergent relativistic Weyl fermions and
have characteristic surface Fermi-arcs in their electronic structure. Weyl semimetals with …

Topological insulators and topological semimetals are both new classes of quantum
materials, which are characterized by surface states induced by the topology of the bulk …

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 …

In a type I Dirac or Weyl semimetal, the low-energy states are squeezed to a single point in
momentum space when the chemical potential μ is tuned precisely to the Dirac/Weyl …

Topological Weyl semimetal (TWS), a new state of quantum matter, has sparked enormous
research interest recently. Possessing unique Weyl fermions in the bulk and Fermi arcs on …

Exotic massless fermionic excitations with nonzero Berry flux, other than the Dirac and Weyl
fermions, could exist in condensed matter systems under the protection of crystalline …

Broadband, efficient and fast conversion of light to electricity is crucial for sensing and clean
energy. The bulk photovoltaic effect (BPVE) is a second-order nonlinear optical effect that …