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  • Title: Nonlocal transport near charge neutrality point in a two-dimensional electron-hole system.
    Author: Gusev GM, Olshanetsky EB, Kvon ZD, Levin AD, Mikhailov NN, Dvoretsky SA.
    Journal: Phys Rev Lett; 2012 Jun 01; 108(22):226804. PubMed ID: 23003639.
    Abstract:
    Nonlocal resistance is studied in a two-dimensional system with a simultaneous presence of electrons and holes in a 20 nm HgTe quantum well. A large nonlocal electric response is found near the charge neutrality point in the presence of a perpendicular magnetic field. We attribute the observed nonlocality to the edge state transport via counterpropagating chiral modes similar to the quantum spin Hall effect at a zero magnetic field and graphene near a Landau filling factor ν=0.
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