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.
Related projects:	CEITEC 2020