Magneto-Optical Signature of Massless Kane Electrons in Cd3As2

• 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
• 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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