Modification and Control of Topological Insulator Surface States Using Surface Disorder

Abstract

We numerically demonstrate a practical means of systematically controlling topological transport on the surface of a three dimensional topological insulator, by introducing strong disorder in a layer of depth $d$ extending inward from the surface of the topological insulator. The dependence on $d$ of the density of states, conductance, scattering time, scattering length, diffusion constant, and mean Fermi velocity are investigated. The proposed control via disorder depth $d$ requires that the disorder strength be near the large value which is necessary to drive the TI into the non-topological phase. If $d$ is patterned using masks, gates, ion implantation, etc., then integrated circuits may be fabricated. This technique will be useful for experiments and for device engineering.

References in corpus (39)

• The electronic properties of graphene
• Topological Insulators
• Quantum Spin Hall Effect in Graphene
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• First observation of Spin-Momentum Helical Locking in Bi2Se3 and Bi2Te3, demonstration of Topological-Order at 300K and a realization of topological-transport-regime
• The Kernel Polynomial Method
• Model Hamiltonian for Topological Insulators
• Control over topological insulator photocurrents with light polarization
• Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi2Se3
• Bulk Fermi surface coexistence with Dirac surface state in Bi${}_2$Se${}_3$: a comparison of photoemission and Shubnikov-de Haas measurements
• Theory of the topological Anderson insulator
• First Principles Studies on 3-Dimentional Strong Topological Insulators: Bi2Te3, Bi2Se3 and Sb2Te3
• Rapid Surface Oxidation as a Source of Surface Degradation Factor for Bi2Se3
• Controlling bulk conductivity in topological insulators: Key role of anti-site defects
• Robust Surface Hall Effect and Nonlocal Transport in SmB6: Indication for an Ideal Topological Insulator
• Crystal Structure and Chemistry of Topological Insulators
• THz response and colossal Kerr rotation from the surface states of the topological insulator Bi${}_2$Se${}_3$
• The strong side of weak topological insulators
• Topological Anderson Insulator in Three Dimensions
• Van der Waals epitaxy of Bi2Se3 on Si(111) vicinal surface: An approach to prepare high-quality thin films of topological insulator
• Random Network Models and Quantum Phase Transitions in Two Dimensions
• Quantum transport of disordered Weyl semimetals at the nodal point
• Fractional topological insulators in three dimensions
• Density of States Scaling at the Semimetal to Metal Transition in Three Dimensional Topological Insulators
• Transport in three-dimensional topological insulators: theory and experiment
• Correlated Topological Insulators and the Fractional Magnetoelectric Effect
• Topological states in two-dimensional optical lattices
• Disordered weak and strong topological insulators
• Reconciling Conductance Fluctuations and the Scaling Theory of Localization
• Surface versus bulk state in topological insulator Bi2Se3 under environmental disorder
• The fate of topological-insulator surface states under strong disorder
• Effects of Smooth Boundaries on Topological Edge Modes in Optical Lattices
• Disorder-induced metal-insulator transitions in three-dimensional topological insulators and superconductors
• Phase Structure of the Topological Anderson Insulator
• Surface state reconstruction in ion-damaged SmB_6
• Evolutions of helical edge states in disordered HgTe/CdTe quantum wells
• Spin Response of Electrons on the Surface of a Topological Insulator
• Robust topological insulator surface conduction under strong surface disorder
• Bulk effects on topological conduction on the surface of 3-D topological insulators

Cited by in corpus (11)

• Observation of half-integer level shift of vortex bound states in an iron-based superconductor
• Materials analysis and focused ion beam nanofabrication of topological insulator Bi2Se3
• Emergent vortex Majorana zero mode in iron-based superconductors
• Comparative study of Weyl semimetal, topological and Chern insulators: thin-film point of view
• Non-Hermiticity induced Exceptional Points and Skin Effect in the Dice-Haldane Model
• Spatially varying electronic dephasing in three dimensional topological insulators
• Topological insulators in random potentials
• Quantum Interference Effects in Topological Nanowires In a Longitudinal Magnetic Field
• Surface excitations relaxation in the Kondo insulator Sm${}_{1-x}$Gd${}_x$B${}_6$
• Effect of surface disorder on the chiral surface states of a three-dimensional quantum Hall system
• Interplay of Disorder and Point-Gap Topology: Chiral Modes, Localization and Non-Hermitian Anderson Skin Effect in One Dimension