Unidirectional magneto-transport of linearly dispersing topological edge states
arXiv:2108.05378 · doi:10.1103/PhysRevB.104.L081406
Abstract
Quantum spin-Hall edges are envisaged as next-generation transistors, yet they exhibit dissipationless transport only over short distances. Here we show that in a diffusive sample, where charge puddles with odd spin cause back-scattering, a magnetic field drastically increases the mean free path and drives the system into the ballistic regime with a Landauer-Buttiker conductance. A strong non-linear non-reciprocal current emerges in the diffusive regime with opposite signs on each edge, and vanishes in the ballistic limit. We discuss its detection in state-of-the-art experiments.
4 pages, 4 figures, Accepted for publication in Phys. Rev. B Rapid Communications
References in corpus (21)
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Topological Field Theory of Time-Reversal Invariant Insulators
- The Quantum Spin Hall Effect: Theory and Experiment
- The Helical Liquid and the Edge of Quantum Spin Hall Systems
- Quantum Spin Hall Effect and Enhanced Magnetic Response by Spin-Orbit Coupling
- Conductance of a helical edge liquid coupled to a magnetic impurity
- Resistance of helical edges formed in a semiconductor heterostructure
- Magneto-resistance up to 60 Tesla in Topological Insulator Bi2Te3 Thin Films
- Carrier screening, transport, and relaxation in 3D Dirac semimetals
- Anisotropic and strong negative magneto-resistance in the three-dimensional topological insulator Bi2Se3
- Helical edge states coupled to a spin bath: Current-induced magnetization
- Resonant photovoltaic effect in doped magnetic semiconductors
- Charge puddles in the bulk and on the surface of the topological insulator BiSbTeSe studied by scanning tunneling microscopy and optical spectroscopy
- Surface and Edge States in Topological Semi-metals
- Progress in epitaxial thin-film Na3Bi as a topological electronic material
- Current noise from a magnetic moment in a helical edge
- Finite frequency backscattering current noise at a helical edge
- Quantum Transport in Air-stable Na3Bi Thin Films
- Importance of interactions for the band structure of the topological Dirac semimetal Na3Bi
- Second-order topological insulator under strong magnetic field: Landau levels, Zeeman effect, and magnetotransport
- Dynamical response of dissipative helical edge states