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 $\nu =0$

arXiv comment5 pages, 4 figures

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• Topological Insulators
• Topological insulators and superconductors
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• The quantum spin Hall effect and topological insulators
• Nonlocal edge state transport in the quantum spin Hall state
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• Transport in disordered two-dimensional topological insulator
• Giant Spin-Hall Effect induced by Zeeman Interaction in Graphene
• Quantum Hall effect near the charge neutrality point in two-dimensional electron-hole system

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• Persistence of two-dimensional topological insulator state in wide HgTe quantum well
• Insulating state and giant non-local response in an InAs/GaSb quantum well in the quantum Hall regime
• Linear magnetoresistance in HgTe quantum wells
• Scale-invariant large nonlocality in polycrystalline graphene
• Robust helical edge transport at $\nu =0$ quantum Hall state
• Quantum Hall effect in n-p-n and n-2D Topological Insulator-n junctions
• Macroscopic transverse drift of long current-induced spin coherence in two-dimensional electron gases
• Magnetotransport in Double Quantum Well with Inverted Energy Spectrum: HgTe/CdHgTe
• Signatures of Helical Edge Transport in Millimetre-Scale Thin Films of Na3Bi
• Chaotic Quantum Transport near the Charge Neutrality Point in Inverted Type-II InAs/GaSb Field-Effect Transistors
• The effect of electron--hole scattering on the transport properties of a 2D semimetal in a HgTe quantum well
• Unconventional Hall effect near charge neutrality point in a two-dimensional electron-hole system
• Conductance oscillations in quantum point contacts of InAs/GaSb heterostructures
• Thermopower of a Two-Dimensional Semimetal in a HgTe Quantum Well
• Thermal transport driven by charge imbalance in graphene in magnetic field, close to the charge neutrality point at low temperature: Non local resistance
• Photo-induced SU(3) topological material of spinless fermions
• Spin current in an electron waveguide tunnel-coupled to topological insulator
• Transformation of an energy spectrum and wave functions in the crossover from two- to three-dimensional topological insulator in HgTe quantum wells: long and thorny way
• Andreev reflection at the edge of a two-dimensional electron system with strong spin-orbit coupling
• Two-dimensional semimetal in HgTe quantum well under hydrostatic pressure
• Signatures of non-local conductivity in near-field microscopy
• Helical liquid of snake states
• Spin mixing between subbands and extraordinary Landau levels shift in wide HgTe quantum wells