Magneto-Optical Signature of Massless Kane Electrons in Cd3As2

A. Akrap, M. Hakl, S. Tchoumakov, I. Crassee, J. Kuba, M. O. Goerbig, C. C. Homes, O. Caha, J. Novák, F. Teppe, W. Desrat, S. Koohpayeh, L. Wu, N. P. Armitage, A. Nateprov, E. Arushanov, Q. D. Gibson, R. J. Cava, D. Van Der Marel, B. A. PiotC. Faugeras, G. Martinez, M. Potemski, M. Orlita

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Abstract

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.

Original languageEnglish (US)
Article number136401
JournalPhysical review letters
Volume117
Issue number13
DOIs
StatePublished - Sep 21 2016

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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