Experimental Realization of a Three-Dimensional Dirac Semimetal

Author(s): Borisenko, Sergey; Gibson, Quinn; Evtushinsky, Danil; Zabolotnyy, Volodymyr; Büchner, Bernd; et al

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Abstract:	We report the direct observation of the three-dimensional (3D) Dirac semimetal phase in cadmium arsenide (Cd3As2) 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 Cd3As2 has one of the highest known bulk electron mobilities. This realization of a 3D Dirac semimetal in Cd3As2 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. © 2014 American Physical Society.
Publication Date:	Jul-2014
Electronic Publication Date:	8-Jul-2014
Citation:	Borisenko, Sergey, Gibson, Quinn, Evtushinsky, Danil, Zabolotnyy, Volodymyr, Büchner, Bernd, Cava, Robert J. (2014). Experimental Realization of a Three-Dimensional Dirac Semimetal. Physical Review Letters, 113 (2), 10.1103/PhysRevLett.113.027603
DOI:	doi:10.1103/PhysRevLett.113.027603
ISSN:	0031-9007
EISSN:	1079-7114
Pages:	113.2:027603-1 - 027603-5
Type of Material:	Journal Article
Journal/Proceeding Title:	Physical Review Letters
Version:	Final published version. Article is made available in OAR by the publisher's permission or policy.
Notes:	Physical Review Letters. Volume 113, Issue 2, 8 July 2014, Article number 027603.