Tunneling Planar Hall Effect in Topological Insulators: Spin-Valves and Amplifiers

Abstract

We investigate tunneling across a single ferromagnetic barrier on the surface of a three-dimensional topological insulator. In the presence of a magnetization component along the bias direction, a tunneling planar Hall conductance (TPHC), transverse to the applied bias, develops. Electrostatic control of the barrier enables a giant Hall angle, with the TPHC exceeding the longitudinal tunneling conductance. By changing the in-plane magnetization direction it is possible to change the sign of both the longitudinal and transverse differential conductance without opening a gap in the topological surface state. The transport in a topological insulator/ferromagnet junction can thus be drastically altered from a simple spin-valve to an amplifier.

13 pages, pages 6-13 contain supplemental material

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Cited by in corpus (23)

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• Chiral Spin Mode on the Surface of a Topological Insulator
• Direct comparison of current-induced spin polarization in topological insulator Bi2Se3 and InAs Rashba states
• Topological insulator spin transistor
• Finite transverse conductance in topological insulators under an applied in-plane magnetic field
• Anisotropic magnetotransport in Dirac-Weyl magnetic junctions
• Planar Josephson Hall effect in topological Josephson junctions
• Thermodynamics in topological Josephson junctions
• Transverse Josephson diode effect in tilted Dirac systems
• Transverse Cooper-Pair Rectifier
• Resonant Tunneling Anisotropic Magnetoresistance Induced by Magnetic Proximity
• Edge spin transport in the disordered two-dimensional topological insulator WTe${}_2$
• Topological bulk states and their currents
• Tunneling spin Hall effect induced by unconventional $p$-wave magnetism
• Coupled spin and valley Hall effects driven by coherent tunneling
• Rashba spin-orbit coupling enhanced magnetoresistance in junctions with one ferromagnet
• Seeing topological edge and bulk currents in time-of-flight images
• Transmission of charge and spin in a topological-insulator-based magnetic structure
• Spatial aspects of spin polarization of structurally split surface states in thin films with magnetic exchange and spin-orbit interaction
• Electric spin and valley Hall effects