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Temperature dependence of the quantum Hall effect in graphene

✍ Scribed by A.J.M. Giesbers; U. Zeitler; M.I. Katsnelson; L.A. Ponomarenko; T.M.G. Mohiuddin; J.C. Maan

Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 201 KB
Volume: 40
Category: Article
ISSN: 1386-9477
DOI: 10.1016/j.physe.2007.08.111

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✦ Synopsis

We have measured the temperature dependence of the quantum Hall effect in single layer graphene for temperatures ranging from 4 to 300 K in magnetic fields up to 32 T. The gap between higher Landau levels measured at n ¼ 6 follows the classically expected behavior for broadened Landau levels. In contrast, the n ¼ AE2 gap, corresponding to excitations between the zeroth and first Landau level of electrons and holes, behaves totally different and is strongly temperature and field dependent. At high magnetic fields and T4100 K it approaches the theoretical gap for very sharp Landau levels.

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