Quasi-ballistic transport of Dirac fermions in a Bi2Se3 nanowire

Abstract

Quantum coherent transport of Dirac fermions in a mesoscopic nanowire of the 3D topological insulator Bi2Se3 is studied in the weak-disorder limit. At very low temperatures, many harmonics are evidenced in the Fourier transform of Aharonov-Bohm oscillations, revealing the long phase-coherence length of surface states. Remarkably, from their exponential temperature dependence, we infer an unusual 1/T power law for the phase coherence length. This decoherence is typical for quasi-ballistic fermions weakly coupled to the dynamics of their environment.

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References in corpus (14)

• Topological Insulators with Inversion Symmetry
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Three dimensional topological invariants for time reversal invariant Hamiltonians and the three dimensional quantum spin Hall effect
• Topological origin of subgap conductance in insulating bilayer graphene
• Two-dimensional Dirac fermions in a topological insulator: transport in the quantum limit
• Bulk Band Gap and Surface State Conduction Observed in Voltage-Tuned Crystals of the Topological Insulator Bi${}_2$Se${}_3$
• Surface State Transport and Ambipolar Electric Field Effect in Bi2Se3 Nanodevices
• Direct measurement of the coherence length of edge states in the Integer Quantum Hall Regime
• Aharonov-Bohm oscillations in disordered topological insulator nanowires
• Quantum interference and Aharonov-Bohm oscillations in topological insulators
• Anomalous Aharonov-Bohm conductance oscillations from topological insulator surface states
• Noise dephasing in the edge states of the Integer Quantum Hall regime
• Dephasing due to electron-electron interaction in a diffusive ring
• Geometrical dependence of decoherence by electronic interactions in a GaAs/GaAlAs square network

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• Aharonov-Bohm interference and phase-coherent surface-state transport in topological insulator rings
• Topological Effects on the Magnetoconductivity in Topological Insulators
• Gate-induced decoupling of surface and bulk state properties in selectively-deposited Bi${}_2$Te${}_3$ nanoribbons
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• Quantum Interference Effects in Topological Nanowires In a Longitudinal Magnetic Field
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• Thermoelectric current in topological insulator nanowires with impurities
• Transport in topological insulator nanowires
• Theory of magnetotransport in shaped topological insulator nanowires
• Bulk effects on topological conduction on the surface of 3-D topological insulators
• Quantum transport through three-dimensional topological insulator p-n junction under magnetic field
• Fabry-Pérot interferometry with gate-tunable 3D topological insulator nanowires
• Quantum oscillations and nontrivial transport in (Bi0.92In0.08)2Se3
• Aharonov-Bohm and Altshuler-Aronov-Spivak oscillations in the quasi-ballistic regime in phase-pure GaAs/InAs core/shell nanowires
• Quantum Coherent Transport of 1D ballistic states in second order topological insulator Bi${}_4$Br${}_4$
• Engineering Dirac electrons emergent on the surface of a topological insulator
• In-plane magnetic field driven conductance modulations in topological insulator kinks
• Aharanov-Bohm oscillations and perfectly transmitted mode in amorphous topological insulator nanowires
• Anisotropic transport properties in prismatic topological insulator nanowires
• In-plane magnetic field-driven symmetry breaking in topological insulator-based three-terminal junctions
• Gate-Modulated Quantum Interference Oscillations in Sb-Doped Bi2Se3 Topological Insulator Nanoribbon