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High Field Quantum Hall Effect in Disordered Graphene Near the Dirac Point

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GraphITA 2011

Part of the book series: Carbon Nanostructures ((CARBON))

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Abstract

We investigate on the conductance properties of low mobility graphene in the quantum Hall regime at filling factor less than \({\textit v}=2.\) For this purpose, we compare the high-field longitudinal and Hall resistances of two graphene samples with different mobility. We show that the presence of “charge density puddles”, most probably due to charged impurities, particularly affect the fundamental high field electronic properties of graphene. In particular, the Hall resistance plateau at \(R_{XY}=h/2e^2\) is unstable and shows a non-monotonic behaviour when the system is driven close to the Dirac point. This phenomenon is ascribed to as Fermi level pinning in the Landau Level sub-bands of graphene, in the presence of disorder.

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Acknowledgements

This work was supported by the projects ANR-08-JCJC-0034-01, MEC FIS 2009-07880, PPT310000-2009-3, JCYL SA049A10-2, Cariplo “Quantdev” and EuroMagNET II.

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Authors and Affiliations

  1. LNCMI, Université de Toulouse, 143 Avenue de Rangueil, 31400, Toulouse, France

    W. Escoffier, J. M. Poumirol, A. Kumar, M. Goiran & B. Raquet

  2. GISC, Departamento de Física de Materiales, Universidad Complutense, 28040, Madrid, Spain

    M. Amado

  3. Laboratorio de Bajas Temperaturas, Universidad de Salamanca, E-37008, Salamanca, Spain

    M. Amado & E. Diez

  4. Dipartimento di Fisica “A. Volta”, Universitá di Pavia, via Bassi 6, 27100, Pavia, Italy

    F. Rossella & V. Bellani

Authors
  1. W. Escoffier
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  2. J. M. Poumirol
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  3. M. Amado
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  4. F. Rossella
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  5. A. Kumar
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  6. E. Diez
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  7. M. Goiran
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  8. V. Bellani
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  9. B. Raquet
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Corresponding author

Correspondence to W. Escoffier .

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Editors and Affiliations

  1. , Dipartimento di Fisica, FISICA Università dell’Aquila (ITALY), Via Vetoio 10, Coppito-L'Aquila, 67100, Italy

    Luca Ottaviano

  2. CNR - IMM Sezione di Bologna, via Gobetti 101, Bologna, 40129, Italy

    Vittorio Morandi

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© 2012 Springer-Verlag Berlin Heidelberg

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Escoffier, W. et al. (2012). High Field Quantum Hall Effect in Disordered Graphene Near the Dirac Point. In: Ottaviano, L., Morandi, V. (eds) GraphITA 2011. Carbon Nanostructures. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-20644-3_9

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