Weyl-semimetals-final.pdf (4.19 MB)
Download fileFrom graphene and topological insulators to Weyl semimetals
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posted on 2017-09-28, 13:19 authored by Romilly D.Y. Hills, Matej Brada, Yang Liu, Michael P. Pierpoint, Binoy Sobnack, Wai M. Wu, Feodor KusmartsevHere we present a short introduction into physics of Dirac materials. In particular we
review main physical properties of various two-dimensional crystals such as graphene, sil-
icene, germanene and others.We comment on the origin of their buckled two-dimensional
shape, and address the issues created by Mermin-Wagner theorem prohibiting the exis-
tence of strictly two-dimensional,
at crystals. Then we describe main ideas which were
leading to the discovery of two and three-dimensional topological insulators and Weyl
fermions. We describe some of their outstanding electronic properties which have been
originating due to the existence of the Dirac gapless spectrum. We also compare simplest
devices made of Dirac materials. Analogies and di erences between Dirac materials and
optics are also discussed.
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