Turbostratic graphitic microstructures: electronically decoupled multilayer graphene devices with robust high charge carrier mobility

Abstract

Carbon nanomaterials continue to amaze scientists due to their exceptional physical properties. Recently there have been theoretical predictions and first reports on graphene multilayers, where, due to the rotation of the stacked layers, outstanding electronic properties are retained while the susceptibility to degradation and mechanical stress is strongly reduced due to the multilayer nature. Here we show that fully turbostratic multilayer graphitic microstructures combine the high charge carrier mobilities necessary for advanced electronic and spintronic devices with the robustness of graphitic structures. Structural characterization of disk-shaped graphitic microstructures using Raman spectroscopy and Transmission Electron Microscopy (TEM) reveals Moiré and diffraction patterns corroborating their turbostratic nature. Electronic transport characterization yields reproducible high mobilities > 105 cm^2(Vs)^(-1) independent of the disks thickness, which is a direct consequence of the electronic decoupling induced by the turbostratic stacking.

References in corpus (17)

• Ultrahigh electron mobility in suspended graphene
• Raman spectroscopy as a versatile tool for studying the properties of graphene
• STM Spectroscopy of ultra-flat graphene on hexagonal boron nitride
• Strong suppression of weak (anti)localization in graphene
• Single Layer Behavior and Its Breakdown in Twisted Graphene Layers
• Approaching the Dirac point in high mobility multi-layer epitaxial graphene
• Weak antilocalization in epitaxial graphene: evidence for chiral electrons
• Novel highly conductive and transparent graphene based conductors
• Few layer graphene on SiC, pyrolitic graphite and graphene: a Raman scattering study
• Phase analysis of quantum oscillations in graphite
• How perfect can graphene be?
• Extreme sensitivity of graphene photoconductivity to environmental gases
• Dirac and Normal Fermions in Graphite and Graphene: Implications to the Quantum Hall Effect
• Inter-Layer Screening Length to Electric Field in Thin Graphite Film
• A consistent interpretation of the low temperature magneto-transport in graphite using the Slonczewski--Weiss--McClure 3D band structure calculations
• Atmospheric doping effects in epitaxial graphene: correlation of local and global electrical measurements
• Domain-wall depinning assisted by pure spin currents

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• Multiscale charge transport in van der Waals thin films: reduced graphene oxide as case study
• Scattering, weak localization and Shubnikov-de Haas oscillation in high carrier density AlInN/GaN heterostructures
• Bulk-scale synthesis of randomly stacked graphene with high crystallinity
• Nature of magnetism and transport in BxCyNz thin films: The intriguing role of nitrogen defects in the electronic structure