title: Experimental realization of a three-dimensional Dirac semimetal.
abstract: We report the direct observation of the three-dimensional (3D) Dirac semimetal phase in cadmium arsenide (Cd(3)As(2)) by means of angle-resolved photoemission spectroscopy. We identify two momentum regions where electronic states that strongly disperse in all directions form narrow conelike structures, and thus prove the existence of the long sought 3D Dirac points. This electronic structure naturally explains why Cd(3)As(2) has one of the highest known bulk electron mobilities. This realization of a 3D Dirac semimetal in Cd(3)As(2) not only opens a direct path to a wide spectrum of applications, but also offers a robust platform for engineering topologically nontrivial phases including Weyl semimetals and quantum spin Hall systems.
authors: Institute for Solid State Research, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany.
authors: Sergey
authors: S
authors: Borisenko
authors: Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.
authors: Quinn
authors: Q
authors: Gibson
authors: Institute for Solid State Research, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany.
authors: Danil
authors: D
authors: Evtushinsky
authors: Institute for Solid State Research, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany.
authors: Volodymyr
authors: V
authors: Zabolotnyy
authors: Institute for Solid State Research, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany and Institut fur Festkörperphysik, Technische Universität Dresden, D-01171 Dresden, Germany.
authors: Bernd
authors: B
authors: Büchner
authors: Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.
authors: Robert J
authors: RJ
authors: Cava