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 …

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In a Dirac semimetal, each Dirac node is resolved into two Weyl nodes with opposite
“handedness” or chirality. The two chiral populations do not mix. However, in parallel electric …

Abstract The Dirac and Weyl semimetals are unusual materials in which the nodes of the
bulk states are protected against gap formation by crystalline symmetry,,,. The chiral …

Recent experimental evidence for the quantum spin Hall (QSH) state in monolayer WTe2
has linked the fields of two-dimensional materials and topological physics,,,,,–. This two …

Weyl semimetals provide the realization of Weyl fermions in solid-state physics. Among all
the physical phenomena that are enabled by Weyl semimetals, the chiral anomaly is the …

Weyl metal is the first example of a conducting material with a nontrivial electronic structure
topology, making it distinct from an ordinary metal. Unlike in insulators, the nontrivial …

Topology, a mathematical concept, has recently become a popular and truly
transdisciplinary topic encompassing condensed matter physics, solid state chemistry, and …

We provide a pedagogical review article on fundamentals and applications of the quantum
dynamics in strong electromagnetic fields in QED and QCD. The fundamentals include the …