Graphene, universality of the quantum Hall effect and redefinition of the SI system

Janssen, T J B M (author): National Phys Lab, England,National Physical Laboratory (NPL)

Fletcher, N E (author): Bur Int Poids and Mesures,BIPM Bureau International des Poids et Mesures

Goebel, R (author): Bur Int Poids and Mesures,BIPM Bureau International des Poids et Mesures

Williams, J M (author): National Phys Lab, England,National Physical Laboratory (NPL)

Tzalenchuk, A (author): National Phys Lab, England,National Physical Laboratory (NPL)

Yakimova, Rositsa (author): Linköpings universitet,Halvledarmaterial,Tekniska högskolan,Linköping University

Kubatkin, Sergey, 1959 (author): Chalmers,Chalmers tekniska högskola,Chalmers University of Technology

Lara Avila, Samuel, 1983 (author): Chalmers,Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

2011-09-16
2011
English.
In: New Journal of Physics. - : Institute of Physics. - 1367-2630. ; 13:9, s. 093026-

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Abstract Subject headings

The Systeme Internationale dunites (SI) is about to undergo its biggest change in half a century by redefining the units for mass and current in terms of the fundamental constants h and e, respectively. This change crucially relies on the exactness of the relationships that link these constants to measurable quantities. Here we report the first direct comparison of the integer quantum Hall effect (QHE) in epitaxial graphene with that in GaAs/AlGaAs heterostructures. We find no difference in the quantized resistance value within the relative standard uncertainty of our measurement of 8.6 x 10(-11), this being the most stringent test of the universality of the QHE in terms of material independence.

By the author/editor: Janssen, T J B M; Fletcher, N E; Goebel, R; Williams, J M; Tzalenchuk, A; Yakimova, Rosits ...; show more...; Kubatkin, Sergey ...; Lara Avila, Samu ...; Falko, V I; Fal'ko, V. I.; show less...

About the subject

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