THz magnetospectroscopy of double HgTe quantum well

M. Marcinkiewicz (1) , Sergey S. Krishtopenko (1) , Sandra Ruffenach (1) , Christophe Consejo (1) , Dmitry But (1) , Aleksandr Kadykov (1) , M. A. Fadeev , S. V. Morozov , N. N. Michailov , S. A. Dvoretskii , V. Gavrilenko , Wojciech Knap (1) , Frederic Teppe (1)

1 L2C - Laboratoire Charles Coulomb

We report on the first THz magnetospectroscopy of double HgTe quantum well in magnetic fields up to 16 T. Very recently, specific metal phase, which holds some properties of natural bilayer graphene, was predicted in this system. In this work, we focus on the double HgTe QW with parameters, corresponding to such `bilayer graphene' phase. In our experiments we clearly observe THz optical transitions from double-degenerated zero-mode Landau level. A good agreement between experimental and theoretical transition energies confirms previous prediction of `bilayer graphene' phase in double HgTe quantum wells.

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

M. Marcinkiewicz, Sergey S. Krishtopenko, Sandra Ruffenach, Christophe Consejo, Dmitry But, et al.. THz magnetospectroscopy of double HgTe quantum well. 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), Sep 2016, Copenhagen, Denmark. ⟨10.1109/IRMMW-THz.2016.7758790⟩. ⟨hal-01932629⟩