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

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2017

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Richter, Nils
Hernandez, Yenny R.
Kim, June Seo
Patra, Ajit Kumar
Englert, Jan
Lieberwirth, Ingo
Liscio, Andrea
Palermo, Vincenzo
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Physical Review Applied. 2017, 7(2), 024022. eISSN 2331-7019. Available under: doi: 10.1103/PhysRevApplied.7.024022

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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.

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ISO 690RICHTER, Nils, Yenny R. HERNANDEZ, Sebastian SCHWEITZER, June Seo KIM, Ajit Kumar PATRA, Jan ENGLERT, Ingo LIEBERWIRTH, Andrea LISCIO, Vincenzo PALERMO, Mathias KLÄUI, 2017. Robust Two-Dimensional Electronic Properties in Three-Dimensional Microstructures of Rotationally Stacked Turbostratic Graphene. In: Physical Review Applied. 2017, 7(2), 024022. eISSN 2331-7019. Available under: doi: 10.1103/PhysRevApplied.7.024022
BibTex
@article{Richter2017Robus-38848,
  year={2017},
  doi={10.1103/PhysRevApplied.7.024022},
  title={Robust Two-Dimensional Electronic Properties in Three-Dimensional Microstructures of Rotationally Stacked Turbostratic Graphene},
  number={2},
  volume={7},
  journal={Physical Review Applied},
  author={Richter, Nils and Hernandez, Yenny R. and Schweitzer, Sebastian and Kim, June Seo and Patra, Ajit Kumar and Englert, Jan and Lieberwirth, Ingo and Liscio, Andrea and Palermo, Vincenzo and Kläui, Mathias},
  note={Article Number: 024022}
}
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