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Originally published in Science Express on 15 February 2007
Science 9 March 2007:
Vol. 315. no. 5817, p. 1379
DOI: 10.1126/science.1137201
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Brevia

Room-Temperature Quantum Hall Effect in Graphene

K. S. Novoselov,1 Z. Jiang,2,3 Y. Zhang,2 S. V. Morozov,1 H. L. Stormer,2 U. Zeitler,4 J. C. Maan,4 G. S. Boebinger,3 P. Kim,2* A. K. Geim1*

The quantum Hall effect (QHE), one example of a quantum phenomenon that occurs on a truly macroscopic scale, has attracted intense interest since its discovery in 1980 and has helped elucidate many important aspects of quantum physics. It has also led to the establishment of a new metrological standard, the resistance quantum. Disappointingly, however, the QHE has been observed only at liquid-helium temperatures. We show that in graphene, in a single atomic layer of carbon, the QHE can be measured reliably even at room temperature, which makes possible QHE resistance standards becoming available to a broader community, outside a few national institutions.

1 Department of Physics, University of Manchester, Manchester M13 9PL, UK.
2 Department of Physics, Columbia University, New York, NY 10027, USA.
3 National High Magnetic Field Laboratory, Tallahassee, FL 32310, USA.
4 High Field Magnet Laboratory, Radboud University Nijmegen, 6525 ED Nijmegen, Netherlands.

* To whom correspondence should be addressed. E-mail: pkim{at}phys.columbia.edu (P.K.); geim{at}man.ac.uk (A.K.G.)

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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