Time-reversal invariant resonant backscattering on a topological insulator surface driven by a time-periodic gate voltage

Abstract

We study the scattering of the Dirac electrons by a point-like nonmagnetic impurity on the surface of a topological insulator, driven by a time-periodic gate voltage. It is found that, due to the doublet degenerate crossing points of different Floquet sidebands, resonant backscattering can happen for the surface electrons, even without breaking the time-reversal (TR) symmetry of the topological surface states (TSSs). The energy spectrum is reshuffled in a way quite different from that for the circularly polarized light, so that new features are exhibited in the Friedel oscillations of the local charge and spin density of states. Although the electron scattering is dramatically modified by the driving voltage, the $1/\rho$ scale law of the spin precession persists for the TSSs. The TR invariant backscattering provides a possible way to engineer the Dirac electronic spectrum of the TSSs, without destroying the unique property of spin-momentum interlocking of the TSSs.

References in corpus (32)

• Topological insulators and superconductors
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Non-Abelian Anyons and Topological Quantum Computation
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Topological Insulators in Three Dimensions
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Photonic Floquet Topological Insulators
• Floquet Topological Insulator in Semiconductor Quantum Wells
• Observation of Floquet-Bloch states on the surface of a topological insulator
• Model Hamiltonian for Topological Insulators
• Driven quantum transport on the nanoscale
• Majorana Fermions in Equilibrium and Driven Cold Atom Quantum Wires
• Magnetic impurities on the surface of a topological insulator
• A topological insulator surface under strong Coulomb, magnetic and disorder perturbations
• Floquet-Bloch theory and topology in periodically driven lattices
• Hedgehog Spin-texture and Berry's Phase tuning in a Magnetic Topological Insulator
• Disorder-induced Floquet Topological Insulators
• Impurity-induced states on the surface of 3D topological insulators
• Transport signatures of Floquet Majorana fermions in driven topological superconductors
• Photoemission Spectroscopy of Magnetic and Non-magnetic Impurities on the Surface of the Bi${}_2$Se${}_3$ Topological Insulator
• Modulated Floquet Topological Insulators
• Topological Floquet Spectrum in Three Dimensions via a Two-Photon Resonance
• Floquet multi-Weyl points in crossing-nodal-line semimetals
• Electrostatically Controlled Magnetization Rotation in Ferromagnet-Topological Insulator Planar Structures
• Photon Inhibited Topological Transport in Quantum Well Heterostructures
• Filling of magnetic-impurity-induced gap in topological insulators by potential scattering
• Off-resonant polarized light-controlled thermoelectric transport in ultrathin topological insulators
• Inelastic Electron Tunneling Spectroscopy for Topological Insulators
• Charge-Induced Spin Torque in Anomalous Hall Ferromagnets
• Engineered Near-Perfect Back-Scattering on Surface of Topological Insulator with Non-Magnetic Impurities
• Topological insulators in random potentials
• Quasiparticle Interference Patterns in a Topological Superconductor