Discovery of Weyl Fermion Semimetals and Topological Fermi Arc States
Discovery of Weyl Fermion Semimetals and Topological Fermi Arc States
Weyl semimetals are conductors whose low-energy bulk excitations are Weyl fermions, whereas their surfaces possess metallic Fermi arc surface states. These Fermi arc surface states are protected by a topological invariant associated with the bulk electronic wave functions of the material. Recently, it has been shown that the TaAs and …