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 …

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

Recent experiments have revealed spectacular transport properties in semimetals, such as
the large, non-saturating magnetoresistance exhibited by WTe2 (ref.). Topological …

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 …

A Dirac nodal-line semimetal phase, which represents a new quantum state of topological
materials, has been experimentally realized only in a few systems, including PbTaSe 2, PtSn …

A large negative magnetoresistance (NMR) is anticipated in topological semimetals in
parallel magnetic fields, demonstrating the chiral anomaly, a long-sought high-energy …

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 …

Dirac electronic materials beyond graphene and topological insulators have recently
attracted considerable attention. Cd3As2 is a Dirac semimetal with linear dispersion along …

In topological quantum materials,, the conduction and valence bands are connected at
points or along lines in the momentum space. A number of studies have demonstrated that …