Nonlocal transport near the charge neutrality point in a two-dimensional electron-hole system

G. M. Gusev; E. B. Olshanetsky; Z. D. Kvon; A. D. Levin; N. N. Mikhailov; S. A. Dvoretsky

doi:10.1103/PhysRevLett.108.226804

Nonlocal transport near the charge neutrality point in a two-dimensional electron-hole system

Mesoscale and Nanoscale Physics 2012-06-01 v1

Authors: G. M. Gusev , E. B. Olshanetsky , Z. D. Kvon , A. D. Levin , N. N. Mikhailov , S. A. Dvoretsky

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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 (CNP) in the presence of a perpendicular magnetic field. We attribute the observed nonlocality to the edge state transport via counter propagating chiral modes similar to the quantum spin Hall effect at zero magnetic field and graphene near Landau filling factor $\nu=0$

Keywords

nonlocal transport charge neutrality point two-dimensional electron-hole system HgTe quantum well edge state transport chiral modes quantum spin Hall effect

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@article{arxiv.1205.7070,
  title  = {Nonlocal transport near the charge neutrality point in a two-dimensional electron-hole system},
  author = {G. M. Gusev and E. B. Olshanetsky and Z. D. Kvon and A. D. Levin and N. N. Mikhailov and S. A. Dvoretsky},
  journal= {arXiv preprint arXiv:1205.7070},
  year   = {2012}
}

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5 pages, 4 figures

Nonlocal transport near the charge neutrality point in a two-dimensional electron-hole system

Abstract

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