Tunable Surface Conductivity in Bi2Se3 Revealed in Diffusive Electron Transport

Abstract

We demonstrate that the weak antilocalization effect can serve as a convenient method for detecting decoupled surface transport in topological insulator thin films. In the regime where a bulk Fermi surface coexists with the surface states, the low field magnetoconductivity is described well by the Hikami-Larkin-Nagaoka equation for single component transport of non-interacting electrons. When the electron density is lowered, the magnetotransport behavior deviates from the single component description and strong evidence is found for independent conducting channels at the bottom and top surfaces. The magnetic-field-dependent part of corrections to conductivity due to the Zeeman energy is shown to be negligible despite non-negligible electron-electron interactions.

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• Topological Insulator Materials
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• Thickness-independent transport channels in topological insulator Bi2Se3 thin films
• Manifestation of Topological Protection in Transport Properties of Epitaxial Bi2Se3 Thin Films
• Electrically tunable surface-to-bulk coherent coupling in topological insulator thin films
• Thickness-dependent bulk properties and weak anti-localization effect in topological insulator Bi2Se3
• THz response and colossal Kerr rotation from the surface states of the topological insulator Bi${}_2$Se${}_3$
• Weak localization of bulk channels in topological insulator thin film
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• Linear magnetoresistance in topological insulators: Quantum phase coherence effects at high temperatures
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• Transport in three-dimensional topological insulators: theory and experiment
• Weak antilocalization in topological insulator Bi${}_2$Te${}_3$ microflakes
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• Finite-temperature conductivity and magnetoconductivity of topological insulators
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• Magneto-resistance up to 60 Tesla in Topological Insulator Bi2Te3 Thin Films
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• Observation of Anderson localization in ultrathin films of three-dimensional topological insulators
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• Weak Antilocalization and Conductance Fluctuation in a Sub-micrometer-sized Wire of Epitaxial Bi2Se3
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• Synthesis of SnTe Nanoplates with {100} and {111} Surfaces
• Spin-helical transport in normal and superconducting topological insulators
• Demonstration of surface transport in a hybrid Bi2Se3/Bi2Te3 heterostructure
• Parallel field magnetoresistance in topological insulator thin films
• 2D layered transport properties from topological insulator Bi${}_2$Se${}_3$ single crystals and micro flakes
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• Ambipolar Surface Conduction in Ternary Topological Insulator Bi_2(Te_{1-x}Se_x)_3 Nanoribbons
• Large-Area and Transferred High-Quality Three-Dimensional Topological Insulator Bi2-xSbxTe3-ySey Ultrathin Film by Catalyst-Free Physical Vapor Deposition
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• Gate-tunable transport properties of in-situ capped Bi${}_2$Te${}_3$ topological insulator thin films
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• Ambipolar transport in bulk crystals of a topological insulator by gating with ionic liquid
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• Linear magnetoresistance and surface to bulk coupling in topological insulator thin films
• Linear response theory of interacting topological insulators
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• Spin-orbit scattering in quantum diffusion of massive Dirac fermions
• Local photocurrent generation in thin films of the topological insulator Bi2Se3
• Electron-Phonon Coupling and Quantum Correction to Topological Magnetoconductivity in Bi2GeTe4
• Tunable interaction-induced localization of surface electrons in antidot nanostructured Bi2Te3 thin films
• Weak antilocalization in HgTe quantum well with inverted energy spectrum
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• Chemical Potential Fluctuations in Topological Insulator (Bi${}_{0.5}$Sb${}_{0.5}$)${}_2$Te${}_3$ Films Visualized by Photocurrent Spectroscopy
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• Topological Effects on the Magnetoconductivity in Topological Insulators
• Charge puddles in a completely compensated topological insulator
• Weak localization of Dirac fermions in graphene beyond the diffusion regime
• Spatially varying electronic dephasing in three dimensional topological insulators
• Ultralow Thermal Conductivity and Thermoelectric Properties of Bi4GeTe7 with an Intrinsic van der Waal Heterostructure
• Quantum corrections to the magnetoconductivity of surface states in three-dimensional topological insulators
• Switchable quantized conductance in topological insulators revealed by the Shockley-Ramo theorem
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• Topologically localized insulators
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• Magnetic Proximity Effect in an Antiferromagnetic Insulator/Topological Insulator Heterostructure with Sharp Interface
• Anomalous Temperature Dependence of Quantum Correction to the Conductivity of Magnetic Topological Insulators
• Designer topological insulator with enhanced gap and suppressed bulk conduction in Bi2Se3/Sb2Te3 ultra-short period superlattices
• From classical to quantum regime of topological surface states via defect engineering
• Weak anti-localization in spin-orbit coupled lattice systems
• Effect of gallium doping on structural and transport properties of the topological insulator Bi2Se3 grown by molecular beam epitaxy
• Surface states induced weak anti-localization effect in Bi0.85Sb0.15 topological single crystal
• Weak localization of holes in high-mobility heterostructures
• Thickness dependence of electron-electron interactions in topological p-n junctions
• Synchrotron-radiation studies of topological insulators
• Observation of the surface hybridization gap in the electrical transport properties of the ultrathin topological insulator (Bi${}_{1-x}$Sb${}_x$)${}_2$Te${}_3$
• Tracing Dirac points of topological surface states by ferromagnetic resonance
• Accessing topological surface states and negative MR in sculpted nanowires of Bi2Te3 at ultra-low temperature
• A Green's function approach to Topological Insulator junctions with magnetic and superconducting regions
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• Quantum Coherent Transport of 1D ballistic states in second order topological insulator Bi${}_4$Br${}_4$
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• Structural and transport properties of 4f electron doped Y1-x(Dy)xPdBi topological semi-metallic thin films
• Extended Einstein diffusion-mobility equation for two-dimensional Schrödinger-type quantum materials
• Phase-coherent loops in selectively-grown topological insulator nanoribbons
• Tuning Chemical Potential in the Dirac Cone by Compositional Engineering
• Weak anti-localization in spin-orbit coupled lattice systems: effect of non-adiabatic transitions and estimation of spin relaxation length
• Influence of Device Geometry on Transport Properties of Topological Insulator Microflakes