Experimental Proof of Universal Conductance Fluctuation in Quasi-1D Epitaxial Bi${}_2$Se${}_3$ Wires

Abstract

We report on conductance fluctuation in quasi-one-dimensional wires made of epitaxial Bi${}_2$Se${}_3$ thin film. We found that this type of fluctuation decreases as the wire length becomes longer and that the amplitude of the fluctuation is well scaled to the coherence, thermal diffusion, and wire lengths, as predicted by conventional universal conductance fluctuation (UCF) theory. Additionally, the amplitude of the fluctuation can be understood to be equivalent to the UCF amplitude of a system with strong spin-orbit interaction and no time-reversal symmetry. These results indicate that the conductance fluctuation in Bi${}_2$Se${}_3$ wires is explainable through UCF theory. This work is the first to verify the scaling relationship of UCF in a system with strong spin-orbit interaction.

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Cited by in corpus (11)

• Low temperature saturation of phase coherence length in topological insulators
• Dimensional crossover of transport characteristics in topological insulator nanofilms
• Indications of the topological transport by the universal conductance fluctuations in the Bi2Te2Se microflakes
• Conductance fluctuations in disordered 2D topological insulator wires: From quantum spin-Hall to ordinary quantum phases
• Quantum Interference Effects in Topological Nanowires In a Longitudinal Magnetic Field
• Transport in topological insulators with bulk-surface coupling: Interference corrections and conductance fluctuations
• Universal Conductance Fluctuations of Topological Insulators
• Engineering Dirac electrons emergent on the surface of a topological insulator
• Quantum Transport Reservoir Computing
• Phase-coherent loops in selectively-grown topological insulator nanoribbons
• Fermi energy sensitive universal conductance fluctuations in anisotropic materials