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Robust Two-Dimensional Electronic Properties in Three-Dimensional Microstructures of Rotationally Stacked Turbostratic Graphene

Title
Robust Two-Dimensional Electronic Properties in Three-Dimensional Microstructures of Rotationally Stacked Turbostratic Graphene
Authors
Richter, NilsHernandez, Yenny R.Schweitzer, SebastianKim, June-SeoPatra, Ajit KumarEnglert, JanLieberwirth, IngoLiscio, AndreaPalermo, VincenzoFeng, XinliangHirsch, AndreasMuellen, KlausKlaeui, Mathias
DGIST Authors
Kim, June-Seo
Issue Date
2017-02-23
Citation
Physical Review Applied, 7(2)
Type
Article
Article Type
Article
Keywords
Carbon NanotubesEpitaxial GrapheneGasGraphiteMicroscopyPerformanceQuantum Linear MagnetoresistanceRaman SpectroscopyWeak Localization
ISSN
2331-7019
Abstract
We report on the electronic properties of turbostratic graphitic microdisks, rotationally stacked systems of graphene layers, where interlayer twisting leads to electronic decoupling resulting in charge-transport properties that retain the two dimensionality of graphene, despite the presence of a large number of layers. A key fingerprint of this reduced dimensionality is the effect of weak charge-carrier localization that we observe at low temperatures. The disks' resistivity measured as a function of magnetic field changes its shape from parabolic at room temperature to linear at a temperature of 2.7 K indicating further this type of two-dimensional transport. Compared to Bernal stacked graphite, turbostratic graphene is mechanically much more robust, and it exhibits almost negligible variations of the electrical properties between samples. We demonstrate a reproducible resistivity of (3.52±0.11)×10-6 Ω m, which is a particularly low value for graphitic systems. Combined with large charge-carrier mobilities demonstrated at low temperatures of up to 7×104 cm2/V s, typical for carbon-based crystalline conductors, such disks are highly interesting from a scientific point of view and, in particular, for applications where robust electronic properties are required. © 2017 American Physical Society.
URI
http://hdl.handle.net/20.500.11750/4234
DOI
10.1103/PhysRevApplied.7.024022
Publisher
American Physical Society
Files:
There are no files associated with this item.
Collection:
DGIST-LBNL Research Center for Emerging Materials1. Journal Articles


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