Helical edge transport in the presence of a magnetic impurity

Abstract

We consider the effects of electron scattering off a quantum magnetic impurity on the current-voltage characteristics of the helical edge of a two-dimensional topological insulator. We compute the backscattering contribution to the current along the edge for a general form of the exchange interaction matrix and arbitrary value of the magnetic impurity spin. We find that the differential conductance is a non-monotonous function of the voltage with several extrema.

7 pages, 1 figure, to appear in JETP Letters

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Cited by in corpus (24)

• Helical edge transport in the presence of a magnetic impurity: the role of local anisotropy
• Unrestricted electron bunching at the helical edge
• Coherent spin transport through helical edge states of topological insulator
• Optical properties of helical edge channels in zinc-blende-type topological insulators: Selection rules, circular and linear dichroism, circular and linear photocurrents
• Noise insights into electronic transport
• Finite frequency backscattering current noise at a helical edge
• Noise in the helical edge channel anisotropically coupled to a local spin
• Protection of Edge transport in Quantum Spin Hall samples: Spin-Symmetry Based General Approach and Examples
• Spin and charge transport through helical Aharonov-Bohm interferometer with strong magnetic impurity
• Analytical and Numerical study of the out-of-equilibrium current through a helical edge coupled to a magnetic impurity
• Tunneling Aharonov-Bohm interferometer on helical edge states
• Localization of the Helical Edge States in the Absense of External Magnetic Field
• The effect of magnetic impurity scattering on transport in topological insulators
• Suppression of ballistic helical transport by isotropic dynamical magnetic impurities
• Robustness of Helical Edge States Under Edge Reconstruction
• Formation of bound states from the edge states of 2D topological insulator by macroscopic magnetic barriers
• RKKY to Kondo crossover in Helical Edge of a Topological Insulator
• Effects of electron-hole asymmetry on electronic structure of helical edge states in HgTe/HgCdTe quantum wells
• Suppressing backscattering of helical edge modes with a spin bath
• Comment on "Noise in the helical edge channel anisotropically coupled to a local spin"
• Dynamic impurities in two-dimensional topological insulator-edge states
• Reply to comment on "Noise in the helical edge channel anisotropically coupled to a local spin"
• Edge Reconstruction in a Quantum Spin Hall Insulator
• Finite-frequency admittance and noise of a helical edge coupled to a magnet