Journal article
(Letter)


Electron-Electron Interaction in the Magnetoresistance of Graphene


Publication Details
Author(s): Jobst J, Waldmann D, Gornyi I, Mirlin A, Weber HB
Publisher: American Physical Society
Publication year: 2012
Volume: 108
Journal issue: 10
ISSN: 0031-9007

Abstract

We investigate the magnetotransport in large area graphene Hall bars epitaxially grown on silicon carbide. In the intermediate field regime between weak localization and Landau quantization, the observed temperature-dependent parabolic magnetoresistivity is a manifestation of the electron-electron interaction. We can consistently describe the data with a model for diffusive ( magneto) transport that also includes magnetic-field-dependent effects originating from ballistic time scales. We find an excellent agreement between the experimentally observed temperature dependence of magnetoresistivity and the theory of electron-electron interaction in the diffusive regime. We can further assign a temperature-driven crossover to the reduction of the multiplet modes contributing to electron-electron interaction from 7 to 3 due to intervalley scattering. In addition, we find a temperature-independent ballistic contribution to the magnetoresistivity in classically strong magnetic fields.



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How to cite
APA: Jobst, J., Waldmann, D., Gornyi, I., Mirlin, A., & Weber, H.B. (2012). Electron-Electron Interaction in the Magnetoresistance of Graphene. Physical Review Letters, 108(10). https://dx.doi.org/10.1103/PhysRevLett.108.106601

MLA: Jobst, Johannes, et al. "Electron-Electron Interaction in the Magnetoresistance of Graphene." Physical Review Letters 108.10 (2012).

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