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 …

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 …

The past decade has witnessed a surge of interest in exploring emergent particles in
condensed matter systems. Novel particles, emerged as excitations around exotic band …

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 semimetals have recently attracted extensive research interests as host
materials to condensed matter physics counterparts of Dirac and Weyl fermions originally …

The realization of Weyl systems with the minimum nonzero number of Weyl points (WPs)
and full spin polarization remains challenging in topology physics and spintronic. In this …

In quantum field theory, Weyl fermions are relativistic particles that travel at the speed of light
and strictly obey the celebrated Lorentz symmetry. Their low-energy condensed matter …

A nodal loop appears when two bands, typically one electronlike and one holelike, are
crossing each other linearly along a one-dimensional manifold in reciprocal space. Here, we …

Owing to the chirality of Weyl nodes, the Weyl systems can support one-way chiral zero
modes under a strong magnetic field, which leads to nonconservation of chiral currents—the …

Abstract Td-WTe2 (non-centrosymmetric and orthorhombic), a type-II Weyl semimetal, is
expected to have higher-order topological phases with topologically protected, helical one …