Spin and charge transport through helical Aharonov-Bohm interferometer with strong magnetic impurity
arXiv:2101.08601 · doi:10.1103/PhysRevB.103.125428
Abstract
We discuss transport through an interferometer formed by helical edge states of the quantum spin Hall insulator. Focusing on effects induced by a strong magnetic impurity placed in one of the arms of interferometer, we consider the experimentally relevant case of relatively high temperature as compared to the level spacing. We obtain the conductance and the spin polarization in the closed form for arbitrary tunneling amplitude of the contacts and arbitrary strength of the magnetic impurity. We demonstrate the existence of quantum effects which do not show up in previously studied case of weak magnetic disorder. We find optimal conditions for spin filtering and demonstrate that the spin polarization of outgoing electrons can reach 100%.
arXiv comment6 pages, 4 figures
References in corpus (37)
- Topological Insulators
- Topological insulators and superconductors
- Quantum Spin Hall Effect in Graphene
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Quantum Spin Hall Insulator State in HgTe Quantum Wells
- Bismuthene on a SiC Substrate: A Candidate for a New High-Temperature Quantum Spin Hall Paradigm
- Evidence for Helical Edge Modes in Inverted InAs/GaSb Quantum Wells
- Nonlocal edge state transport in the quantum spin Hall state
- Observation of the Quantum Spin Hall Effect up to 100 Kelvin in a Monolayer Crystal
- Aharonov-Bohm interference in topological insulator nanoribbons
- Observation of Quantum Spin Hall States in InAs/GaSb Bilayers under Broken Time-Reversal Symmetry
- Spin polarization of the quantum spin Hall edge states
- Kondo effect in the helical edge liquid of the quantum spin Hall state
- Aharonov-Bohm oscillations in disordered topological insulator nanowires
- Quantum interference and Aharonov-Bohm oscillations in topological insulators
- Transport in disordered two-dimensional topological insulator
- Tomonaga-Luttinger liquid in the edge channels of a quantum spin Hall insulator
- Full electrical control of Charge and Spin conductance through Interferometry of Edge States in Topological Insulators
- Probing Spin Helical Surface States in Topological HgTe Nanowires
- A new paradigm for the quantum spin Hall effect at high temperatures
- Spin Aharonov-Bohm effect and topological spin transistor
- Magnetic field induced localization in 2D topological insulators
- Robustness of Quantum Spin Hall Effect in an External Magnetic Field
- Gate-tuned Aharonov-Bohm interference of surface states in a quasi-ballistic Dirac semimetal nanowire
- Edge states interferometry and spin rotations in zigzag graphene nanoribbons
- Coherent Oscillations and Giant Edge Magnetoresistance in Singly Connected Topological Insulators
- Helical edge transport in the presence of a magnetic impurity
- Aharonov-Bohm conductance through a single-channel quantum ring: Persistent-current blockade and zero-mode dephasing
- The effect of in-plane magnetic field and applied strain in quantum spin Hall systems: application to InAs/GaSb quantum wells
- Evidence on the macroscopic length scale spin coherence for the edge currents in a narrow HgTe quantum well
- Aharonov-Bohm conductance of a disordered single-channel quantum ring
- Aharonov Bohm effect in 2D topological insulator
- Topological surface states in thick partially relaxed HgTe film
- Coherent spin transport through helical edge states of topological insulator
- Tunneling Aharonov-Bohm interferometer on helical edge states
- Spin-charge separation in an Aharonov-Bohm interferometer
- Aharonov-Bohm effect in a helical ring with long-range hopping: Effects of Rashba spin-orbit interaction and disorder