Magneto-Optical Signature of Massless Kane Electrons in Cd_{3} As_{2}

A. Akrap (1) , M. Hakl (2) , S. Tchoumakov (3) , I. Crassee (4) , J. Kuba (2, 5) , M. Goerbig (6) , C. c. Homes (7) , O. Caha (8) , J. Novák (8) , F. Teppe (9) , W. Desrat (9) , S. Koohpayeh (10) , L. Wu (10, 11) , N. p. Armitage (10) , A. Nateprov (12) , E. Arushanov (12) , Q. d. Gibson (13) , J. Cava (13) , D. van Der Marel (1) , B. A. Piot (2) , C. Faugeras (2) , Gines Martinez Garcia (2) , M. Potemski (2) , M. Orlita (2)

1 DQMP - Department of Quantum Matter Physics [Geneva]
2 LNCMI-G - Laboratoire national des champs magnétiques intenses - Grenoble
3 LPS - Laboratoire de Physique des Solides
4 GAP-Biophotonics - Group of Applied Physics - Biophotonics [Geneva]
5 CEITEC BUT, Brno University of Technology, Purkynova 123, 612 00 Brno, Czech Republic
6 LPS - Laboratoire de Physique des Solides
7 CMPMS - Department of Condensed Matter Physics and Materials Science [TIFR]
8 CEITEC MU - Central European Institute of Technology [Brno]
9 L2C - Laboratoire Charles Coulomb
10 JHU - Johns Hopkins University
11 UC Berkeley - University of California [Berkeley]
12 Academy of Sciences of Moldova
13 DPPU - Department of Physics, Princeton University

We report on optical reflectivity experiments performed on Cd3As2 over a broad range of photonenergies 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 weare 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.

Domaines: Autre [cond-mat.other]; Science des matériaux [cond-mat.mtrl-sci]; Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

A. Akrap, M. Hakl, S. Tchoumakov, I. Crassee, J. Kuba, et al.. Magneto-Optical Signature of Massless Kane Electrons in Cd_{3} As_{2}. Physical Review Letters, 2016, 117 (13), ⟨10.1103/PhysRevLett.117.136401⟩. ⟨hal-01986067⟩