|Magnetoabsorption of Dirac Fermions in InAs/GaSb/InAs "Three-Layer" Gapless Quantum Wells |
Auteur(s): Ruffenach S., Krishtopenko S., Bovkun L. s., Ikonnikov A. V., Marcinkiewicz M., Consejo C., Potemski M., Piot B., Orlita M., Semyagin B. r., Putyato M. a., Emel'yanov E. a., Preobrazhenskii V. v., Knap W., Gonzalez-Posada F., Boissier G., Tournié Eric, Teppe F., Gavrilenko V. I.
(Article) Publié: Jetp Letters / Sov Phys Jetp Lett, vol. 106 p.727-732 (2017)
Ref HAL: hal-01830516_v1
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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.