Magnetoabsorption of Dirac Fermions in InAs/GaSb/InAs "Three-Layer" Gapless Quantum Wells

Sandra Ruffenach (1) , Sergey S. Krishtopenko (1) , L. S. Bovkun , A. V. Ikonnikov (2) , M. Marcinkiewicz , Christophe Consejo (1) , M. Potemski (3) , B. Piot (3) , M. Orlita (3) , B. R. Semyagin , M. A. Putyato , E. A. Emel'Yanov , V. V. Preobrazhenskii , Wojciech Knap (1) , F. Gonzalez-Posada , G. Boissier (4) , Eric Tournié (4) , Frederic Teppe (1) , V. I. Gavrilenko (2)

1 L2C - Laboratoire Charles Coulomb
2 Institute for Physics of Microstructures of the RAS
3 LNCMI-G - Laboratoire national des champs magnétiques intenses - Grenoble
4 IES - Institut d’Electronique et des Systèmes

Cyclotron resonance spectra in high magnetic fields up to 34 T in InAs/GaSb/InAs “three-layer” quantum wells with gapless Dirac fermions have been studied. In quantizing magnetic fields, an absorption line associated with transitions from the lower Landau levels of electrons in a subband with a “conical” dispersion relation has been detected. Experimental energies of the transitions have been compared to theoretical calculations with the eight-band Kane Hamiltonian. The results confirm the gapless band structure of the studied samples.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Sandra Ruffenach, Sergey S. Krishtopenko, L. S. Bovkun, A. V. Ikonnikov, M. Marcinkiewicz, et al.. Magnetoabsorption of Dirac Fermions in InAs/GaSb/InAs "Three-Layer" Gapless Quantum Wells. JETP Letters, 2017, 106 (11), pp.727-732. ⟨10.1134/S0021364017230102⟩. ⟨hal-01830516⟩