Spin-polarized tunneling current through a thin film of topological insulator in a parallel magnetic field

Abstract

We calculate the tunneling conductance σbetween the surface states on the opposite sides of the ultra-thin film of a topological insulator in a parallel magnetic field B_y. The parallel magnetic produces a relative shift of the in-plane momenta of the two surfaces states. An overlap between the shifted Fermi circles and their spin structure define an unusual dependence of the tunneling conductance σ(B_y) on the magnetic field. Because the spin of the electronic surface states in topological insulators is locked with momentum, the spin-polarization of the tunneling current can be controlled by magnetic field B_y.

arXiv comment5 pages, 3 figures; Section V edited and extended

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• Parallel field magnetoresistance in topological insulator thin films
• Topological insulator based spin valve devices: evidence for spin polarized transport of spin-momentum-locked topological surface states
• Effect of Rashba splitting on RKKY interaction in topological insulator thin films
• Observation of Planar Hall Effect in Topological Insulator -- Bi${}_2$Te${}_3$
• Specular Andreev reflection in thin films of topological insulators
• Enhancement of crossed Andreev reflection in normal-superconductor-normal junction of thin topological insulator
• Impurity scattering on the surface of topological insulator thin films
• Valley filter from magneto-tunneling between single and bi-layer graphene
• Non-Linear Spin Susceptibility in Topological Insulators
• Magnetic Field Induced Weyl Semimetal from Wannier-Function-based Tight-Binding Model
• Optical responses and optical activity of ultrathin films of topological insulator
• Highly Tunable Spin-Orbit Torque and Anisotropic Magnetoresistance in a Topological Insulator Thin Film Attached to Ferromagnetic Layer
• Magneto-tunnelling spectroscopy of chiral two-dimensional electron systems
• Effects of a tilted magnetic field in a Dirac double layer
• Signature of surface state coupling in thin films of the topological Kondo insulator SmB${}_6$ from anisotropic magnetoresistance
• Effect of surface state hybridization on current-induced spin-orbit torque in thin topological insulator films
• Dynamical density response and collective modes of topological insulator ultra-thin films
• Promoted current-induced spin polarization in inversion symmetry broken topological insulator thin films
• Interlayer tunneling spectroscopy of graphite at high magnetic field oriented parallel to the layers