title: Nonlocal transport near charge neutrality point in a two-dimensional electron-hole system.
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.
authors.affiliation: Instituto de Física da Universidade de São Paulo, 135960-170, São Paulo, SP, Brazil.
authors.forename: G M
authors.initials: GM
authors.lastname: Gusev
authors.forename: E B
authors.initials: EB
authors.lastname: Olshanetsky
authors.forename: Z D
authors.initials: ZD
authors.lastname: Kvon
authors.forename: A D
authors.initials: AD
authors.lastname: Levin
authors.forename: N N
authors.initials: NN
authors.lastname: Mikhailov
authors.forename: S A
authors.initials: SA
authors.lastname: Dvoretsky