Abstract
A topological Dirac or Weyl semimetal is a topological phase of matter, in which the conduction and valence bands touch at a finite number of points, i.e., the Weyl nodes. Uniaxial rotation symmetries protect the nodes against gap formation. Topological Weyl semimetals host paired monopoles and antimonopoles of Berry curvature at the Weyl nodes and topologically protected Fermi arcs at certain surfaces. The chiral anomaly of the Weyl fermions , a pure quantum mechanical phenomenon, can be realized in solids, and is attributed to the exotic magneto-transport properties in Weyl and Dirac semimetals.
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Shen, SQ. (2017). Topological Dirac and Weyl Semimetals. In: Topological Insulators. Springer Series in Solid-State Sciences, vol 187. Springer, Singapore. https://doi.org/10.1007/978-981-10-4606-3_11
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DOI: https://doi.org/10.1007/978-981-10-4606-3_11
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