Weak antilocalization and electron-electron interaction in coupled multiple-channel transport in a Bi${}_2$Se${}_3$ thin film

Abstract

Electron transport properties of a topological insulator Bi${}_2$Se${}_3$ thin film are studied in Hall-bar geometry. The film with a thickness of 10 nm is grown by van der Waals epitaxy on fluorophlogopite mica and Hall-bar devices are fabricated from the as-grown film directly on the mica substrate. Weak antilocalization and electron-electron interaction effects are observed and analyzed at low temperatures. The phase-coherence length extracted from the measured weak antilocalization characteristics shows a strong power-law increase with decreasing temperature and the transport in the film is shown to occur via coupled multiple (topological surface and bulk states) channels. The conductivity of the film shows a logarithmically decrease with decreasing temperature and thus the electron-electron interaction plays a dominant role in quantum corrections to the conductivity of the film at low temperatures.

12 pages, 5 figures

References in corpus (3)

• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Quantum interference and Aharonov-Bohm oscillations in topological insulators
• Top gating of epitaxial (Bi_{1-x}Sb_x)2Te3 topological insulator thin films

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• Large-Area and Transferred High-Quality Three-Dimensional Topological Insulator Bi2-xSbxTe3-ySey Ultrathin Film by Catalyst-Free Physical Vapor Deposition
• Observation of multichannel quantum coherent transport and electron-electron interaction in Bi2Te3 single crystal
• Universal conductance fluctuations and phase-coherent transport in a semiconductor Bi${}_2$O${}_2$Se nanoplate with strong spin-orbit interaction
• Signatures of dephasing by mirror-symmetry breaking in weak-antilocalization magnetoresistance across the topological transition in Pb${}_{1-x}$Sn${}_x$Se
• Dephasing in strongly anisotropic black phosphorus
• Influence of an anomalous temperature-dependence of the phase coherence length on the conductivity of magnetic topological insulators
• Spatially varying electronic dephasing in three dimensional topological insulators
• Single-Electron Transistor Made of a 3D Topological Insulator Nanoplate
• Enhanced coherence and decoupled surface states in topological insulators through structural disorder
• Anomalous Temperature Dependence of Quantum Correction to the Conductivity of Magnetic Topological Insulators
• Thickness dependence of electron-electron interactions in topological p-n junctions
• Effects of disorder on the quantum transport properties in topologically nontrivial metal PbTaSe${}_2$
• Surface-bulk coupling in a Bi${}_2$Te${}_3$ nanoplate grown by van der Waals epitaxy