Charge and spin transport in edge channels of a $\nu =0$ quantum Hall system on the surface of topological insulators

Abstract

Three-dimensional topological insulators of finite thickness can show the quantum Hall effect (QHE) at the filling factor $\nu =0$ under an external magnetic field if there is a finite potential difference between the top and bottom surfaces. We calculate energy spectra of surface Weyl fermions in the $\nu =0$ QHE and find that gapped edge states with helical spin structure are formed from Weyl fermions on the side surfaces under certain conditions. These edge channels account for the nonlocal charge transport in the $\nu =0$ QHE which is observed in a recent experiment on (Bi${}_{1-x}$Sb${}_x$)${}_2$Te${}_3$ films. The edge channels also support spin transport due to the spin-momentum locking. We propose an experimental setup to observe various spintronics functions such as spin transport and spin conversion.

arXiv comment7 pages, 5 figures

References in corpus (18)

• The electronic properties of graphene
• Topological Insulators
• Topological insulators and superconductors
• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• Topological Field Theory of Time-Reversal Invariant Insulators
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• Seeing the magnetic monopole through the mirror of topological surface states
• Quantum Hall Effect from the Topological Surface States of Strained Bulk HgTe
• Spin Filtered Edge States and Quantum Hall Effect in Graphene
• Observation of topological surface state quantum Hall effect in an intrinsic three-dimensional topological insulator
• The zero-energy state in graphene in a high magnetic field
• Dissipative Quantum Hall Effect in Graphene near the Dirac Point
• Quantized Anomalous Hall Effect in Two-Dimensional Ferromagnets - Quantum Hall Effect from Metal -
• Gap opening in the zeroth Landau level of graphene
• The surface states of topological insulators - Dirac fermion in curved two dimensional spaces
• Magnetoresistance measurements of Graphene at the Charge Neutrality Point
• The enigma of the nu=0 quantum Hall effect in graphene
• Inverse spin Hall effect in a closed loop circuit

Cited by in corpus (14)

• Topological magneto-electric effects in thin films of topological insulators
• Quantum transport of two-species Dirac fermions in dual-gated three-dimensional topological insulators
• Edge states and integer quantum Hall effect in topological insulator thin films
• Two-Dimensional Lattice Model for the Surface States of Topological Insulators
• Two-dimensional topological insulator state in cadmium arsenide thin films
• Stepwise quantized surface states and delayed Landau level hybridization in Co cluster-decorated BiSbTeSe2 topological insulator devices
• Giant nonlocal edge conduction in the axion insulator state of MnBi2Te4
• Zeeman field-induced two-dimensional Weyl semimetal phase in cadmium arsenide
• Gate tunable quantum Hall effects in defect-suppressed Bi2Se3 films
• Surface Step Defect in 3D Topological Insulators: Electric Manipulation of Spin and Quantum Spin Hall Effect
• Ambipolar magneto-optical response of ultra-low carrier density topological insulators
• From classical to quantum regime of topological surface states via defect engineering
• Tunable Dirac points and zero-energy modes in periodic curved graphene superlattices
• Landau levels on a surface of weak topological insulators