%0 Conference Paper %F Oral %T Magnetospectroscopy of double HgTe/CdHgTe quantum wells %+ Laboratoire Charles Coulomb (L2C) %A Bovkun, L. S. %A Krishtopenko, Sergey S. %A Ikonnikov, A. V. %A Aleshkin, V. Ya. %A Kadykov, Aleksandr %A Ruffenach, Sandra %A Consejo, Christophe %A Teppe, Frederic %A Knap, Wojciech %A Orlita, M. %A Piot, B. %A Potemski, M. %A Mikhailov, N. N. %A Dvoretskii, S. A. %A Gavrilenko, V. I. %< avec comité de lecture %Z L2C:16-194 %B XX International Symposium “Nanophysics and Nanoelectronics” %C Nizhny Novgorod, Russia %I MAIK Nauka/Interperiodica %V 50 %N 11 %P 1532-1538 %8 2016-03-14 %D 2016 %R 10.1134/S1063782616110063 %Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Conference papers %X The magnetoabsorption spectra in double HgTe/CdHgTe quantum wells (QWs) with normal and inverted band structures are investigated. The Landau levels in symmetric QWs with a rectangular potential profile are calculated based on the Kane 8 × 8 model. The presence of a tunnel-transparent barrier is shown to lead to the splitting of states and “doubling” of the main magnetoabsorption lines. At a QW width close to the critical one the presence of band inversion and the emergence of a gapless band structure, similar to bilayer graphene, are shown for a structure with a single QW. The shift of magnetoabsorption lines as the carrier concentration changes due to the persistent photoconductivity effect associated with a change in the potential profile because of trap charge exchange is detected. This opens up the possibility for controlling topological phase transitions in such structures. %G English %L hal-01406356 %U https://hal.science/hal-01406356 %~ CNRS %~ L2C %~ MIPS %~ UNIV-MONTPELLIER %~ UM-2015-2021