Weak antilocalization in topological insulator Bi${}_2$Te${}_3$ microflakes

Abstract

We have studied the carrier transport in two topological insulator (TI) Bi${}_2$Te${}_3$ microflakes between 0.3 and 10 K and under applied backgate voltages ($V_{\mathrm{BG}}$). Logarithmic temperature dependent resistance corrections due to the two-dimensional electron-electron interaction effect in the presence of weak disorder were observed. The extracted Coulomb screening parameter is negative, which is in accord with the situation of strong spin-orbit scattering as is inherited in the TI materials. In particular, positive magnetoresistances (MRs) in the two-dimensional weak-antilocalization (WAL) effect were measured in low magnetic fields, which can be satisfactorily described by a multichannel-conduction model. Both at low temperatures of $T<1$ K and under high positive $V_{\mathrm{BG}}$, signatures of the presence of two coherent conduction channels were observed, as indicated by an increase by a factor of $\approx$ 2 in the prefactor which characterizes the WAL MR magnitude. Our results are discussed in terms of the (likely) existence of the Dirac fermion surface states, in addition to the bulk states, in the three-dimensional TI Bi${}_2$Te${}_3$ material.

7 pages, 4 figures, + Supplementary Material

References in corpus (9)

• Weak localisation magnetoresistance and valley symmetry in graphene
• Gate-Voltage Control of Chemical Potential and Weak Anti-localization in Bismuth Selenide
• Impurity effect on weak anti-localization in the topological insulator Bi2Te3
• Bulk Band Gap and Surface State Conduction Observed in Voltage-Tuned Crystals of the Topological Insulator Bi${}_2$Se${}_3$
• Tunable Surface Conductivity in Bi2Se3 Revealed in Diffusive Electron Transport
• Weak Localization and Antilocalization in Topological Insulator Thin Films with Coherent Bulk-Surface Coupling
• Electron-phonon scattering in topological insulators
• Electron dephasing in homogeneous and inhomogeneous indium tin oxide thin films
• Universal conductance fluctuations in indium tin oxide nanowires

Cited by in corpus (47)

• Colloquium: Topological Band Theory
• Dirac materials
• Finite-temperature conductivity and magnetoconductivity of topological insulators
• Granularity Controlled Non-Saturating Linear Magneto-resistance in Topological Insulator Bi2Te3 Films
• Observation of Anderson localization in ultrathin films of three-dimensional topological insulators
• Demonstration of surface transport in a hybrid Bi2Se3/Bi2Te3 heterostructure
• Weak localization and weak anti-localization in topological insulators
• Linear magneto-resistance versus weak antilocalization effects in Bi${}_2$Te${}_3$ films
• Enhanced electron dephasing in three-dimensional topological insulators
• Electronic conduction properties of indium tin oxide: single-particle and many-body transport
• Two-dimensional quantum transport of multivalley (111) surface state in topological crystalline insulator SnTe thin films
• Defect induced negative magnetoresistance and surface state immunity in topological insulator BiSbTeSe2
• Gate-tunable transport properties of in-situ capped Bi${}_2$Te${}_3$ topological insulator thin films
• Enhanced spin-orbit interaction and Kondo scattering in $\delta$-doped LaTiO${}_3$/SrTiO${}_3$ interfaces
• Conductivity Corrections for Topological Insulators with Spin-Orbit Impurities: A New Hikami-Larkin-Nagaoka Formula
• Weak Localization and Antilocalization in Topological Materials with Impurity Spin-Orbit Interactions
• Tunable interaction-induced localization of surface electrons in antidot nanostructured Bi2Te3 thin films
• Weak antilocalization effect due to topological surface states in Bi${}_2$Se${}_{2.1}$Te${}_{0.9}$
• Electron-Phonon Coupling and Quantum Correction to Topological Magnetoconductivity in Bi2GeTe4
• Magnetic interactions at the nanoscale in trilayer titanates LaTiO${}_3$/SrTiO${}_3$/YTiO${}_3$
• Observation of multichannel quantum coherent transport and electron-electron interaction in Bi2Te3 single crystal
• Quantum Transport and Potential of Topological States for Thermoelectricity in Bi${}_2$Te${}_3$ Thin Films
• Crossover Between Weak Antilocalization and Weak Localization and Electron-Electron Interaction in Few-Layer WTe${}_2$
• Low temperature Hall effect in bismuth chalcogenides thin films
• Prominent metallic surface conduction and the singular magnetic response of topological Dirac fermion in three-dimensional topological insulator Bi${}_{1.5}$Sb${}_{0.5}$Te${}_{1.7}$Se${}_{1.3}$
• Electron-electron interactions and weak anti-localization in few-layer ZrTe5 devices
• Signatures of dephasing by mirror-symmetry breaking in weak-antilocalization magnetoresistance across the topological transition in Pb${}_{1-x}$Sn${}_x$Se
• Gate tunable spin-orbit coupling and weak antilocalization effect in an epitaxial La${}_{2/3}$Sr${}_{1/3}$MnO${}_3$ thin film
• Shubnikov-de Haas oscillations in p and n-type topological insulator (Bi${}_x$Sb${}_{1-x}$)${}_2$Te${}_3$
• Signature of enhanced spin-orbit interaction in the magnetoresistance of LaTiO${}_3$/SrTiO${}_3$ interfaces on $\delta$-doping
• Universal conductance fluctuations and direct observation of crossover of symmetry classes in topological insulators
• Weak antilocalization effect and triply degenerate state in Cu-doped CaAuAs
• Phase-coherent transport in catalyst-free vapor phase deposited Bi${}_2$Se${}_3$ crystals
• Ultralow Thermal Conductivity and Thermoelectric Properties of Bi4GeTe7 with an Intrinsic van der Waal Heterostructure
• In-depth Analysis of Anisotropic Magnetoconductance in Bi${}_2$Se${}_3$ thin films with electron-electron interaction corrections
• Influence of magnetic and electric fields on universal conductance fluctuations in thin films of the Dirac semi-metal Cd3As2
• Kondo effect with tunable spin orbit interaction in LaTiO3/CeTiO3/SrTiO3 heterostructure
• Spin-Orbit Interaction and Kondo Scattering at the PrAlO${}_3$/SrTiO${}_3$ Interface: Effects of Oxygen Content
• Logarithmic singularities and quantum oscillations in magnetically doped topological insulators
• Boundary scattering effects on magnetotransport of narrow metallic wires and films
• Thickness dependence of electron-electron interactions in topological p-n junctions
• Accessing topological surface states and negative MR in sculpted nanowires of Bi2Te3 at ultra-low temperature
• Tracing Dirac points of topological surface states by ferromagnetic resonance
• The evaluation of non-topological components in Berry phase and momentum relaxation time in a gapped 3D topological insulator
• Surface-bulk coupling in a Bi${}_2$Te${}_3$ nanoplate grown by van der Waals epitaxy
• Influence of Device Geometry on Transport Properties of Topological Insulator Microflakes
• Phase-coherent loops in selectively-grown topological insulator nanoribbons