Journal
APPLIED PHYSICS LETTERS
Volume 91, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2789673
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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 milliamperes through the graphene device, which is here typically a few microns wide. This ultrahigh 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. (C) 2007 American Institute of Physics.
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