Current-induced cleaning of graphene

Details Current-induced cleaning of graphene Current-induced cleaning of graphene

2007-09-05

arxiv.org/abs/0709.0607v1

Appl. Phys. Lett. 91, 163513 (2007)

Physics

Condensed Matter

Other Condensed Matter

Accepted for publication in Applied Physics Letters

Scientific paper

10.1063/1.2789673

A simple yet highly reproducible method to suppress contamination of graphene at low temperature inside the cryostat is presented. The method consists of applying a current of several mA through the graphene device, which is here typically a few $\mu$m wide. This ultra-high current density is shown to remove contamination adsorbed on the surface. This method is well suited for quantum electron transport studies of undoped graphene devices, and its utility is demonstrated here by measuring the anomalous quantum Hall effect.

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