Magneto-Optical Signature of Massless Kane Electrons in Cd3As2

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Authors

AKRAP A. HAKL M. TCHOUMAKOV S. CRASSEE I. KUBA J. GOERBIG M.O. HOMES C.C. CAHA Ondřej NOVÁK Jiří TEPPE F. DESRAT W. KOOHPAYEH S. WU L. ARMITAGE N.P. NATEPROV A. ARUSHANOV E. GIBSON Q.D. CAVA R.J. VAN DER MAREL D. PIOT B.A. FAUGERAS C. MARTINEZ G. POTEMSKI M. ORLITA M.

Year of publication 2016
Type Article in Periodical
Magazine / Source Physical Review Letters
MU Faculty or unit

Central European Institute of Technology

Citation
Web Paper on the web-page of the publisher
Doi http://dx.doi.org/10.1103/PhysRevLett.117.136401
Field Solid matter physics and magnetism
Keywords DIRAC SEMIMETAL CD3AS2; BAND-STRUCTURE; CADMIUM ARSENIDE; II3V2 COMPOUNDS; CRYSTAL; SEMICONDUCTORS; MOBILITY; GRAPHENE
Description We report on optical reflectivity experiments performed on Cd3As2 over a broad range of photon energies and magnetic fields. The observed response clearly indicates the presence of 3D massless charge carriers. The specific cyclotron resonance absorption in the quantum limit implies that we are probing massless Kane electrons rather than symmetry-protected 3D Dirac particles. The latter may appear at a smaller energy scale and are not directly observed in our infrared experiments.
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