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 …

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 recent years, transition metal dichalcogenides (TMDs) have garnered great interest as
topological materials. In particular, monolayers of centrosymmetric β-phase TMDs have …

The quantum behaviour of electrons in materials is the foundation of modern electronics and
information technology,,,,,,,,,–, and quantum materials with topological electronic and optical …

Weyl semimetal is a new quantum state of matter,,,,,,,,,,, hosting the condensed matter
physics counterpart of the relativistic Weyl fermions originally introduced in high-energy …

Recently, a type-II Weyl fermion was theoretically predicted to appear at the contact of
electron and hole Fermi surface pockets. A distinguishing feature of the surfaces of type-II …

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 …

Three-dimensional (3D) topological semimetals represent a new class of topological
matters. The study of this family of materials has been at the frontiers of condensed matter …

Physicists have discovered a new topological phase of matter, the Weyl semimetal, whose
surface features a non-closed Fermi surface whereas the low-energy quasiparticles in the …

We use ultrahigh resolution, tunable, vacuum ultraviolet laser angle-resolved photoemission
spectroscopy (ARPES) to study the electronic properties of WTe 2, a material that was …