Plateau insulator transition in graphene

The quantum Hall effect in a single-layer graphene sample is studied in strong magnetic fields up to 28 T. Our measurements reveal the existence of a metal- insulator transition from filling factor \(\nu=-2\) to \(\nu=0\). The value of the universal scaling exponent is found to be \(\kappa=0.57 \) i...

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Bibliographic Details
Published in:arXiv.org 2010-03
Main Authors: Amado, M, Diez, E, López-Romero, D, Rossella, F, Caridad, J M, Dionigi, F, Bellani, V, Maude, D K
Format: Article
Language:English
Subjects:
Graphene
Quantum Hall effect
Online Access:Get full text
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Summary:The quantum Hall effect in a single-layer graphene sample is studied in strong magnetic fields up to 28 T. Our measurements reveal the existence of a metal- insulator transition from filling factor \(\nu=-2\) to \(\nu=0\). The value of the universal scaling exponent is found to be \(\kappa=0.57 \) in graphene and therefore in a truly two-dimensional system. This value of \(\kappa\) is in agreement with the accepted universal value for the plateau-insulator transitions in standard quasi two-dimensional electron and hole gases.
ISSN:2331-8422
DOI:10.48550/arxiv.0907.1492