%0 Journal Article
%T Quantum Hall states in inverted HgTe quantum wells probed by transconductance fluctuations
%+ Laboratoire Charles Coulomb (L2C)
%+ TQNS
%+ Spectroscopie Térahertz
%+ Institut d’Electronique et des Systèmes (IES)
%+ Térahertz, hyperfréquence et optique (TéHO)
%+ Axe Physique Appliquées
%+ Institute for Physics of Microstructures of the RAS
%+ Rzhanov Institute of Semiconductor Physics (ISP)
%A Mantion, S.
%A Avogadri, Colin
%A Krishtopenko, Sergey S.
%A Gebert, S.
%A Ruffenach, Sandra
%A Consejo, Christophe
%A Morozov, S.
%A Mikhailov, N. N.
%A Dvoretskii, S. A.
%A Knap, Wojciech
%A Nanot, Sébastien
%A Teppe, Frederic
%A Jouault, Benoit
%< avec comité de lecture
%Z L2C:20-093
%@ 2469-9950
%J Physical Review B
%I American Physical Society
%V 102
%N 7
%P 075302
%8 2020
%D 2020
%R 10.1103/PhysRevB.102.075302
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
%Z Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]
%Z Engineering Sciences [physics]/Optics / PhotonicJournal articles
%X We investigated quantum Hall states in an inverted HgTe quantum well (QW) close to the critical thickness using transconductance fluctuation (TF) measurements. In the conduction band, several integer quantum Hall states were observed, corresponding to filling factors ν=1,2,3,4. For magnetic fields above 2 T, quantum Hall states ν=0 were observed in the normal gap. These observations agreed well with the previous studies of quantum Hall states on GaAs QWs and graphene. Interestingly, TFs corresponding to anomalous positive filling factor ν were clearly observed in the valence band. We attribute the emergence of those TFs to the localization and charging of the heavy holes located in the side maxima of the valence band.
%G English
%2 https://hal.science/hal-02919868/document
%2 https://hal.science/hal-02919868/file/FinalFile_transconductance_v7_resub_final.pdf
%L hal-02919868
%U https://hal.science/hal-02919868
%~ CNRS
%~ IES
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ ANR
%~ UM-2015-2021