Journal
SOLID STATE COMMUNICATIONS
Volume 146, Issue 9-10, Pages 351-355Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2008.02.024
Keywords
graphene; nanofabrication; electronic transport
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We have achieved mobilities in excess of 200,000 cm(2) V(-1)s(-1) at electron densities of similar to 2x10(11) cm(-2) by suspending single layer graphene. Suspension similar to 150 nin above a Si/SiO2 gate electrode and electrical contacts to the graphene was achieved by a combination of electron beam lithography and etching. The specimens were cleaned in situ by employing current-induced heating, directly resulting in a significant improvement of electrical transport. Concomitant with large mobility enhancement, the widths of the characteristic Dirac peaks are reduced by a factor of 10 compared to traditional, nonsuspended devices. This advance should allow for accessing the intrinsic transport properties of graphene. (C) 2008 Elsevier Ltd. All rights reserved.
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