Nonlocal transport near the 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 (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 $\nu =0$

5 pages, 4 figures

References in corpus (5)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Nonlocal edge state transport in the quantum spin Hall state
• Giant Nonlocality near the Dirac Point in Graphene
• Dissipative Quantum Hall Effect in Graphene near the Dirac Point

Cited by in corpus (8)

• Spin-helical transport in normal and superconducting topological insulators
• Persistence of two-dimensional topological insulator state in wide HgTe quantum well
• Linear magnetoresistance in HgTe quantum wells
• Robust helical edge transport at $\nu =0$ quantum Hall state
• Quantum Hall effect in n-p-n and n-2D Topological Insulator-n junctions
• Unconventional Hall effect near charge neutrality point in a two-dimensional electron-hole system
• Thermal transport driven by charge imbalance in graphene in magnetic field, close to the charge neutrality point at low temperature: Non local resistance
• Spin current in an electron waveguide tunnel-coupled to topological insulator